Plenary geomorphology division session and ECS award lecture. This session will consist of the Geomorphology Early Career Scientist Award winner’s lecture, talks from the GM OSPP winners, and additional invited talks.

This is a poster-only session that welcomes contributions about any topic related to geomorphology. If you do not find a GM session that is a good fit for your abstract, this is the place for you. We also particularly welcome contributions about the discipline of geomorphology in general, history of science analyses, interdisciplinary research, career pathways and opportunities, equality-diversity-inclusion (EDI) stories, educational and outreach topics.

Soil erosion is a key driver of land degradation, leading to a cascade of impacts from on-site soil loss and reduced agricultural yields to off-site consequences such as flooding and sediment and contaminant pollution of aquatic environments. The environmental, economic, and societal impacts of soil erosion require a comprehensive scientific understanding of the physical processes controlling soil detachment, transport, storage, and redistribution from hillslopes to catchments, lakes, and estuaries.
This cross-disciplinary session covers the latest scientific developments in soil erosion and sediment delivery. By integrating hydrology, geomorphology, soil sciences, and biogeosciences, we aim to unify all driving forces of land degradation and catchment particle-bound transport.
Our goal is to bridge the gap between plot-scale soil loss and catchment sediment routing, linking short-term monitoring with long-term observations. Advancing this process knowledge connects methodological developments to conceptual frameworks, promoting sustainable management.

The following topics will form the core areas of presentation and discussion:
• Measurements and Tracing: Field and lab experiments developing process understanding (e.g., interrill to gully erosion) and catchment sediment tracing techniques.
• Monitoring: Short- to long-term assessments tracking landscape changes via local field assessments, UAS, and broad-scale remote sensing.
• Modelling Approaches: Innovative simulation techniques, from empirical and process-based to data-driven, addressing runoff, gully erosion, sediment transport, and catchment sediment budgets from plot to global scales under current and future climate scenarios.
• Sediment and Contaminant Dynamics: Quantification of sediment transit or residence times, storage, remobilisation, and the biogeochemical controls of associated contaminant transport impacting riverine and lacustrine ecosystems.
• Mitigation, Restoration and Impacts: Evaluation of conservation strategies, including successes and failures in addressing the on-site and off-site impacts of land use change and disturbances (e.g., agriculture, forestry, mining, urbanisation, wildfires).
Ultimately, we explore conservation strategies that support stakeholders and global initiatives, including the EU Soil Monitoring Law, Land Degradation Neutrality by 2030, and the UN Decade on Ecosystem Restoration (2021-2030).

Sitting under a tree, you feel the spark of an idea, and suddenly everything falls into place. The following days and tests confirm: you have made a magnificent discovery — so the classical story of scientific genius goes…

But science as a human activity is error-prone, and might be more adequately described as "trial and error". Handling mistakes and setbacks is therefore a key skill of scientists. Yet, we publish only those parts of our research that did work. That is also because a study may have better chances to be accepted for scientific publication if it confirms an accepted theory or reaches a positive result (publication bias). Conversely, the cases that fail in their test of a new method or idea often end up in a drawer (which is why publication bias is also sometimes called the "file drawer effect"). This is potentially a waste of time and resources within our community, as other scientists may set about testing the same idea or model setup without being aware of previous failed attempts.

Thus, we want to turn the story around, and ask you to share 1) those ideas that seemed magnificent but turned out not to be, and 2) the errors, bugs, and mistakes in your work that made the scientific road bumpy. In the spirit of open science and in an interdisciplinary setting, we want to bring the BUGS out of the drawers and into the spotlight. What ideas were torn down or did not work, and what concepts survived in the ashes or were robust despite errors?

We explicitly solicit Blunders, Unexpected Glitches, and Surprises (BUGS) from modeling and field or lab experiments and from all disciplines of the Geosciences.

In a friendly atmosphere, we will learn from each other’s mistakes, understand the impact of errors and abandoned paths on our work, give each other ideas for shared problems, and generate new insights for our science or scientific practice.

Here are some ideas for contributions that we would love to see:
- Ideas that sounded good at first, but turned out to not work.
- Results that presented themselves as great in the first place but turned out to be caused by a bug or measurement error.
- Errors and slip-ups that resulted in insights.
- Failed experiments and negative results.
- Obstacles and dead ends you found and would like to warn others about.

For inspiration, see the collection of BUGS - ranging from clay bricks to atmospheric temperature extremes - at https://meetingorganizer.copernicus.org/EGU25/session/52496

The Quaternary Period (the last 2.6 million years) is characterized by frequent and abrupt climate swings and rapid environmental change. Studying these changes requires accurate, precise dating methods that can be applied effectively to environmental archives. Different methods or a combination of various dating techniques can be used depending on the archive, time range, and research question. Varve counting and dendrochronology allow for the construction of high-resolution chronologies. In contrast, radiometric methods (radiocarbon, cosmogenic in-situ, U-Th, and even Pb-210 for the Anthropocene), luminescence dating, and electron spin resonance dating provide independent anchors for chronologies that span longer timescales. We particularly welcome contributions that aim to (1) reduce, quantify, and express dating uncertainties in any dating method, including high-resolution radiocarbon approaches; (2) use established geochronological methods to answer new questions; (3) use new methods including recognizing and critically examine their limitations to address longstanding issues, or; (4) combine different chronometric techniques for improved results, including the analysis of chronological datasets with novel methods, e.g., Bayesian age-depth modeling; (5) we also welcome contributions integrating multiple chronological and provenance tools including U-Pb geochronology and apatite fission track thermochronology to constrain sediment provenance and source to sink dynamics. Applications may aim to understand long-term landscape evolution, quantify rates of geomorphological processes, or provide chronologies for records of climate change and anthropogenic effects on Earth's system.

Environmental seismology has matured into a key discipline for exploring Earth surface dynamics across a broad range of spatial and temporal scales. Physical, chemical, and biological processes leave measurable imprints in seismic records, whether as discrete events or continuous signatures. By sensing continuously to processes that are hard to observe by other measurements, environmental seismology methods are increasingly refined to capture these signals with high resolution, scalable deployment, and integration across diverse observational platforms. As a community of geophysicists, geomorphologists, glaciologists, hydrologists, volcanologists, engineers, and ecologists, we advance theory, develop methods, and apply seismic observations to pressing questions in Earth-surface research and natural hazards, including when and how mountains and volcanoes destabilize, how glaciers and frozen ground respond to warming, how sediment transport shapes rivers, and how water input alters the subsurface.
We invite contributions on methodological and theoretical developments, field and laboratory experiments, and innovative applications. We particularly welcome work that combines seismic observations with complementary data streams (e.g., remote sensing, in-situ monitoring, fiber-optic networks, or meteorological records), as well as studies leveraging data-intensive approaches (e.g., large-scale arrays, distributed acoustic sensing, machine learning, physics-informed modeling). We anticipate a lively discussion on current challenges in understanding Earth surface processes, opportunities for community-based research and open data initiatives, and the role of seismic methods in addressing urgent questions related to climate change, natural hazard resilience, and coupled Earth system dynamics.

Sediment transport is a fundamental component of all geomorphic systems (including fluvial, aeolian, coastal, hillslopes and glacial), yet it is something that we still find surprisingly difficult both to monitor and to model. Robust data on where and how sediment transport occurs are needed to address outstanding research questions, including the spatial and temporal controls on critical shear stress, the influence of varying grain size distributions, and the impact of large magnitude events. Recent developments have provided a) new opportunities for measuring sediment transport in the field; and b) new ways to represent sediment transport in both physical laboratory models and in numerical models. These developments include (but are not limited to) the application of techniques such as seismic and acoustic monitoring, 3D imaging (e.g. CT and MRI scanning), deployment of sensors such as accelerometers, replication of field topography using 3D printing, use of luminescence as a sediment tracer, remote sensing of turbidity, discrete numerical modelling, and new statistical approaches.

In this session we welcome contributions from all areas of geomorphology that develop new methods for monitoring and modelling all types of sediment transport, or that showcase an application of such methods. Contributions from ECRs and underrepresented groups are particularly encouraged.

Geochronological techniques such as cosmogenic nuclides, thermochronology, radiocarbon and luminescence dating continue to improve in accuracy, precision and temporal range. Developments in combining geochronological methods, data treatment and landscape evolution models have provided new insights into the timing, rates and magnitude of Earth surface processes. Integrating geochronological datasets from different techniques with tectonic, geomorphic, and landscape evolution models offers enormous potential for understanding how tectonics, climate, erosion, and sediment transport interact to shape landscapes across a wide range of spatial and temporal scales. This session includes studies ranging from erosion rates, sediment provenance, burial and transport times, geomorphic response to active deformation, cooling histories and landscape dynamics. and technical developments and novel applications of Quaternary geochronometers. We invite studies that apply novel geochronological methods, combine geochronological and geochemical techniques with numerical modeling or landscape evolution analyses, and that highlight the latest developments and open questions in the application of geochronometers in geomorphology.

We are looking herein for new methodological, new techniques, new processing and new applications using UAS / drones to study any Earth Science processes.
We would like first to share our various knowledge, techniques, processing, methodologies, and experience in the use of UAS. Then we would like to illustrate the so many applications existing nowadays in Earth Sciences.
Moreover, we would like to insist on the importance to get a whole high resolution - pluri centimetric Ground Resolution – multitemporal dataset of aerial photographs coverage of a studied area at a so low price. An UAS acquisition provides after processing orthophotos as well as a high resolution Digital Surface Model from which we may process a high resolution Digital Terrain Model with many applications.
Consequently, we would expect various examples and applications from very different field in Earth Sciences such as geological and geomorphological mapping, geomorphometry, geodesy, natural hazards such as volcanic and seismic hazards, or landslide monitoring, floods, or other applications such as neotectonics and active tectonics, structural geology, tectonics, sedimentology and mapping of inaccessible outcrops, monitoring of fluvial or marine terrasses in order to get their evolutions, climate changes, and so on...
Finally we hope by this session and with time to create an « UAS community of the different colleagues who use UAS with applications in Earth Sciences » in order to optimize our practise, our results and our knowledge.

Imaging the Earth’s surface and reconstructing its topography to study the landscape and (sub-)surface processes have advanced rapidly over the past two decades, sometimes separately within different geoscientific disciplines. Developments in satellite, airborne, uncrewed aerial vehicle (UAV), and ground-based sensing, alongside advances in photogrammetry, Structure-from-Motion (SfM), LiDAR, computer vision, and automated processing, have transformed our ability to reconstruct and monitor the Earth’s surface in 2D, 3D, and 4D (time series).
The spatial, temporal, and spectral resolutions of current measurements offer the opportunity to study the surface evolution from local to regional scale at unprecedented detail. Equipped with optimized workflows, either digitizing analogue data, such as historical aerial photographs, or processing near-continuous records of topographic change, geoscientists now have a variety of tools to better understand our rapidly changing environment and disentangle anthropogenic from natural drivers.
Yet, challenges still exist at both methodological and application levels. How can reliable data be acquired in harsh, remote, or non-ideal environments? How can observations from different time periods, scales, and platforms be reconstructed, co-registered, and compared? How should measurement precision, systematic errors, and uncertainty be quantified and propagated into estimates of surface change? And how can computer-vision, machine-learning, and automation extract meaningful information from large and complex 3D and 4D datasets?
In this session, we invite contributions from across the geosciences (e.g., geomorphology, glaciology, volcanology, hydrology, soil sciences) on the opportunities, limitations, and challenges of surface imaging, topographic reconstruction, and change analysis across diverse environments.
We especially welcome contributions addressing (1) novel data acquisition in complex, remote, or rapidly changing environments; (2) image and point-cloud processing, including image matching, reconstruction, co-registration, and correction of sensor distortions; (3) precision and uncertainty assessment, including systematic errors; (4) construction and analysis of multitemporal and 4D datasets, from historical records to high-frequency and near-continuous observations; (5) automated processing, analysis, and information extraction from large and complex datasets; and (6) innovative applications in geosciences.

Over the past several decades, topographic measurement techniques have undergone significant advancement, evolving toward increasingly sophisticated instruments capable of higher precision and spatial resolution. This technological progression has enabled diverse applications across Earth sciences, particularly in territorial analysis for monitoring and quantifying geomorphological processes and their associated changes at varying temporal and spatial scales.

The intersection between geomatics and geomorphology represents a fundamental pathway for quantifying landscape evolution, assessing geohazards, improving cartographic representation, and informing land management decisions. From debris flow channel activation to glacial retreat monitoring, and from geomorphic signature of active tectonics to landslide hazard mapping, integrated geomatics approaches provide critical insights into surface processes.

This session invites researchers to present work employing integrated methodologies across diverse environmental settings. We encourage submissions utilizing topographic surveying, GPS/GNSS data analysis, photogrammetry (including UAV-based approaches), remote sensing imagery, geomorphometric analyses, InSAR data analysis, and machine learning applications. Contributions demonstrating multi-scale and multi-temporal approaches are particularly welcomed.

The study on superficial grain size dynamics has been a fundamental tool in comprehending surface processes such as erosion, fluvial geomorphology, landslides, volcanic activity, coastal dynamics, and glacial areas, particularly in the context of changing climate. Traditional techniques for grain characterization are related to a high time and labour costs and have been reinventing for decades. This session aims to present various methodologies applied to grain size characterization across different geomorphological subjects.

Hydrogeomorphic processes emerge from interactions among fluid motion, sediment and granular materials, and evolving landforms. They span spatial and temporal scales from the entrainment and collective motion of individual grains to sediment-laden flows, reach-scale morphodynamics and landscape evolution. Although dynamic grain-scale mechanisms are increasingly resolved through high-resolution imaging, embedded sensing and particle-resolved simulations, translating this understanding into continuum representations and reliable field-scale forecasts remains a fundamental challenge in riverine geomorphology, hydrology, fluvial hydraulics and environmental fluid mechanics.

This session brings together field observations, physical experiments, theory, numerical modelling and data-driven approaches that advance process measurement, mechanistic understanding, scale bridging and prediction. We particularly welcome studies developing or integrating novel instrumentation and sensing, imaging and remote sensing, particle tracking, laboratory experiments, particle-resolved and discrete-element simulations, continuum modelling, data assimilation, uncertainty quantification, and model calibration, verification and validation.

Contributions may address particle entrainment and granular dynamics; grain–fluid and grain–grain interactions; stochastic sediment transport and size segregation; particle-laden, debris and granular flows; erosion, deposition and evolving boundaries; bedform development and morphodynamics; extreme or rapidly varying flows; and the representation of these processes across particle, reach and landscape scales. Applications may include rivers, hillslopes, infrastructure, environmental management, natural hazards and forecasting. Studies that connect observations to grain-scale mechanisms, upscale those mechanisms into reduced-order or continuum representations, and evaluate predictive capability across environments and scales are especially encouraged.

Mountains are home to over 1 billion people and one of the most hazardous landscapes on Earth. The combination of steep topography, active tectonics, shifting orographic rainfall patterns and changing glacier equilibrium lines mean hazards in mountain landscapes are highly dynamic.

In these high-elevation landscapes, processes such as landslides, debris flows and floods, often originate at high altitude and propagate downstream, amplifying the impacts and affecting downstream communities. These events may be widespread or highly localized, and are typically triggered by earthquakes, intense storms, or sequences of compounding factors such as rapid snowpack warming, rain on frozen ground, moraine-dam failures, avalanches, or landslides that initiate further mass mobilization. The cascading nature of these processes means that not only the triggering conditions, but also downstream channel morphology and characteristics (e.g., sediment availability and composition) play a role in shaping the magnitude and frequency of such hazards.

In this session, we are keen to include contributions that cover any or all aspects of the mountain, multi-hazard chain across various spatial and temporal scales, such as those that investigate:
· catastrophic sediment mobilization and cascading hazard chains
· processes and hazards linked to deposition and runout
· concepts of compounding and cascading dynamics
· connectivity between hillslopes and river networks
· controls on the downstream evolution of floods and flows.

We welcome presentations employing observational, conceptual, methodological, or modeling approaches, individually or in combination, across diverse mountain environments. Early-career scientists are particularly encouraged to contribute.

Recent years have seen extraordinarily large events and disasters originating from the high-mountain cryosphere in the Himalaya and beyond. Some of those events in the last five years include the 2021 Melamchi debris flow in Nepal, the 2021 rock-ice avalanche in Chamoli, Uttarakhand, India, or the 2023 South Lhonak GLOF, Sikkim, India.
The most devastating was the 26 August 2026 Rasuwa disaster in Nepal. A very large rock slope failure occurred on the northern slopes of Langtang Lirung (7240 m asl), together with the overlying glacier with an estimated failure volume of 110 to 130 million m3; it produced a rock-ice avalanche that rushed into the Lendhe valley and gradually transformed into a debris flood that devastated the Bhote-Koshi and Trishuli valleys on a length of more than 100 km, through Rasuwa, Nuwakot, Dhading, Gorkha, and Chitwan districts and across the border into Gyirong County, Tibet Autonomous Region. The path of destruction down the valleys is far beyond any historical monsoon-type flood. More than 1,500 people have confirmed dead, around 5,000 are missing, many have been injured, and large number of infrastructures have been damaged or lost. About 10% of Nepal’s hydropower production was wiped away. Total estimated loss as per preliminary estimate is USD 2.7 Billion (6.7% of Nepal’s GDP) and estimated cost for re-building is USD 4.8 Billion (11.8% of Nepal’s GDP).
In this context, understanding the processes behind increasing cases of cryosphere-originated disasters risks in the Himalayan region in South Asia, assessing hazards and residual risks, and identifying ways forward to minimize future risk is critical to support resilient development and planning of societies in the Himalayan region and beyond.
This session aims to bring together the various multi-disciplinary research that has been conducted in the weeks and months after the disaster. It includes but is not limited to aspects such as pre-disaster development in the source area, conditioning and potential preparatory or triggering factors of the initial rock slope failure, attribution to climate change, flow processes and dynamics of the avalanche and debris flood, landscape impact and longer term change, loss and damage estimates, implications for hazard and risk analysis in the region and related recommendations.
We also invite contributions on analysis of other recent large events in the region that can foster insights into the above outlined aspects.

Climate change will lead to periods of intense rainfall, along with increased drought and heatwaves. This stresses landscapes in ways not experienced in our living memory. The critical zone, from tree canopy to unfractured bedrock, is likely compartmentalized, and the interactions between each compartment will evolve under climate extremes. The subsurface will control how landscapes respond, erode, and recover from extreme events (for example, how soils erode, gullies form, landslides initiate, and how rivers incise and transport sediment). In turn, these geomorphic changes further modify infiltration, groundwater recharge, subsurface flow paths, rock fracturing and weathering. Human activities and infrastructure such as dams, irrigation, deforestation, and urbanization further reshape these interactions by altering water and sediment connectivity. We propose a session that will explore the connectivity and feedbacks among the geosphere, hydrosphere, biosphere and technosphere, and how their interactions shape landscape response to change. We invite contributions that seek to model, measure, and observe the functioning of the surface and subsurface as well as interactions between the surface and subsurface, from soils to groundwater and from hillslopes and intermittent streams to rivers. 

Past climate variability and extreme events cannot be understood from any single source of information. Climate-model simulations provide physically consistent representations of past climate states and the processes governing variability and extremes, but they cannot reproduce the unique sequence of events that actually occurred. Geological and biological proxies, historical documents, archaeological records and other event-based archives instead preserve evidence of the realised past, but with heterogeneous temporal resolution, spatial coverage, sensitivity, preservation and uncertainty. This session invites contributions that combine, compare or jointly interpret multiple sources of information to investigate past climate change, variability and extremes.

We particularly welcome studies integrating climate-model simulations with geological, palaeoenvironmental, documentary, historical or archaeological evidence; approaches addressing rare or high-impact events such as storms, floods, droughts and heat extremes; statistical or probabilistic methods designed to account explicitly for dating uncertainty, proxy sensitivity, observational thresholds, preservation biases and model uncertainty.

Of particular interest are approaches that move beyond simple model–data comparison towards a process-based understanding of what different sources can reveal about past climate states and events. Contributions exploring data assimilation, probabilistic inference, multi-proxy synthesis, event attribution, high-resolution palaeoclimate modelling, machine learning, or methods for identifying convergence and disagreement among heterogeneous evidence are encouraged.

The session aims to foster dialogue across traditionally separate communities and to explore how complementary information from models and archives can be combined to produce more physically grounded and uncertainty-aware reconstructions of past climate variability and extremes.

Glacial Lake Outburst Floods (GLOFs)—the sudden release of water from lakes dammed by moraines, ice, or bedrock—are among the most dynamic perturbations of Earth’s surface. Their geomorphic signatures can persist for hundreds to thousands of years, while recent events in mountainous regions have demonstrated their potential to cause damage and loss of life when floods reach downstream communities that may be unprepared. Major uncertainties remain in understanding where and when GLOFs occur, how they are triggered and propagate, how landscapes respond, and how these processes may change in the future.

This session explores links between glacial-lake evolution, outburst-flood processes, geomorphic legacies, and societal impacts, with the aim of advancing our understanding of landscape evolution and future hazard and risk. We particularly welcome contributions using sedimentary and geochronological evidence to reconstruct paleo-lakes and paleo-GLOFs, constrain their magnitude and frequency, quantify sediment fluxes, and investigate how outburst floods establish, reorganise, or abandon drainage systems. Contributions addressing the processes controlling GLOF initiation are also encouraged, including ice–lake interactions, dam failure, and triggering and preconditioning mechanisms. A particular focus is the changing abundance and size of glacial lakes, and potential feedbacks on GLOF frequency and magnitude, as well as downstream geomorphic and ecological impacts. We invite studies examining the role of anthropogenic climate warming in GLOF activity, as well as approaches for incorporating dynamically evolving lake populations into flood, hazard, and risk models. We therefore welcome new insights from field observations, remote sensing, and process-based modelling that can improve lake monitoring, early warning, risk management, and assessments of downstream vulnerability.

This session seeks to cover the full breadth of glacial-lake research, spanning paleo-lake and paleo-flood reconstruction, state-of-the-art glacial-lake mapping and remote sensing, field observations, process-based modelling, and assessments of the geomorphological, hydraulic, and ecological impacts of GLOFs. We therefore aim to synthesize studies connecting observations across timescales and spatial scales, from individual lake and flood processes to regional and global changes, in order to provide new perspectives on the future evolution of glacial lakes and GLOF hazards.

Natural hazards rarely occur independently. Earthquakes can trigger landslides, landslides can dam rivers and generate floods, volcanic eruptions can induce mass movements and tsunamis, wildfires can alter hydrological and sediment transport processes, and changes in glaciers and permafrost can initiate sequences of slope failure, debris flow, and flooding. In such cascades, an initial process modifies the physical state of the system and controls the initiation, magnitude, timing, or propagation of subsequent hazards. Risk evolves with these cascades, as exposure and vulnerability are reshaped by each successive event. Damaged infrastructure, depleted response capacity, displaced populations, and altered land use can amplify the consequences of later hazards, so that dynamic vulnerability becomes a first-order control on cascading risk.
Despite increasing attention to multi-hazard risk, the mechanisms governing these interactions remain poorly understood. Key questions concern how energy, mass, water, sediment, and stress are transferred between processes; how these processes interact; how antecedent conditions and event history influence subsequent hazards; and how feedbacks, nonlinearities, and differences in spatial and temporal scales control whether a disturbance attenuates or develops into a cascade. Answering these questions requires long-term observations to capture the slow preconditioning, relaxation, and recovery phases that link successive events, and allow rare but high-impact cascades to be placed in a meaningful statistical and process-based context.
This session brings together research on the physical processes governing cascading natural hazards. We welcome observational, experimental, theoretical, numerical, and data driven studies addressing topics including:
•Multiphysics modelling of triggering, coupling, amplification, and attenuation between hazard processes;
•Transfer of mass, momentum, energy, stress, water, and sediment between interacting processes;
•Reconstruction and analysis of well documented cascading events across different environments and spatial and temporal scales.
•Field observations, Earth observation, geodetic, seismological, hydrological monitoring, and other measurements used to resolve process interactions;
•Methods for identifying causal relationships and separating triggering from coincident or common forcing;
•Effects of environmental and climatic change on the physical conditions controlling hazard cascades;

Geomorphic systems are increasingly exposed to interacting climatic, environmental and anthropogenic changes that alter the magnitude, frequency and spatial organisation of Earth-surface processes. Understanding landscape responses requires moving beyond individual process domains and viewing geomorphic systems as interconnected networks in which changes can propagate across spatial and temporal scales. Connectivity provides a framework for assessing system structure and its changes, interactions between processes and structural properties, and geomorphic sensitivity—the strength of system responses to internal and external forcing. Responses may be gradual or, when thresholds are crossed, involve abrupt transformations.

This session invites contributions examining geomorphic and hydrological connectivity and its role in the propagation of change, or “transmission sensitivity”, within and across fluvial, hillslope, aeolian, coastal, glacial and periglacial environments. We welcome studies on how material, energy and process connectivity influence geomorphic responses to climate change, land-use change and other human impacts, and how feedbacks between process domains generate cascading or compound responses. Contributions may address sediment, water, ice, wind or biogeomorphic connectivity, including structural, functional and temporal dimensions.

Particular emphasis is placed on gradual versus abrupt geomorphic change, including thresholds, tipping points, regime shifts, extreme events and cascading hazards. We encourage contributions combining observations, monitoring, remote sensing, modelling, experiments and conceptual approaches to identify controls on geomorphic sensitivity and transitions between alternative states.

The session also seeks to link fundamental geomorphic understanding with management and societal challenges. Contributions addressing natural hazards and risks, landscape resilience, river and coastal management, sediment management, ecosystem restoration, nature-based solutions, adaptation and decision-making under environmental change are particularly encouraged.

By bringing together researchers across traditionally separated geomorphic domains, the session aims to foster an integrated understanding of how connectivity controls geomorphic sensitivity, how disturbances propagate through landscapes, and how geomorphic systems evolve under accelerating environmental change.

Recent advances in digital technologies, including remote sensing, digital mapping, mobile applications, extended reality (XR) and artificial intelligence (AI), have created new opportunities for geodiversity and geoheritage research, assessment, mapping and monitoring as well as for outreach and geotourism.
For instance, Augmented Reality (AR) can overlay digital content onto real sites and objects, revealing features that cannot be directly observed. Its applications include reconstructing past landscapes, enriching museum collections, and supporting on-site geoheritage interpretation. Virtual Reality (VR), meanwhile, immerses users in a fully simulated environment, providing remote access to geosites, virtual outcrops, museums and field activities.
AI-based methods are also increasingly being explored in geodiversity and geoheritage studies and applications. At the same time, their use raises important questions concerning scientific reliability, data quality, accessibility, inclusivity, intellectual property, and ethical practice.
The session contributions examine the development, applications and critical evaluation of emerging digital and AI-based approaches in geodiversity and geoheritage research. Topics may include, but are not limited to, extended reality, virtual field experiences, 3D modelling and visualisation, digital inventories and mapping, remote sensing, citizen science, AI-assisted assessment and monitoring, mobile applications, digital interpretation, education, outreach, geoconservation, and geotourism.

Human activity became a major player of global climatic and environmental change in the course of the late Quaternary, during the Anthropocene. Consequently, it is crucial to understand these changes through the study of former human-environmental interactions at different spatial and temporal scales. Documenting the diversity of human responses and adaptations to climate, landscapes, ecosystems, natural disasters and the changing natural resources availability in different regions of our planet, provides valuable opportunities to learn from the past. To do so, cross-disciplinary studies in Geoarchaeology offer a chance to better understand the archaeological records and landscapes in context of human culture and the hydroclimate-environment nexus over time. This session seeks related interdisciplinary papers and specific geoarchaeological case-studies that deploy various approaches and tools to address the reconstruction of former human-environmental interactions from the Palaeolithic period through the modern. Topics related to records of the Anthropocene from Earth and archaeological science perspectives are welcome. Furthermore, contributions may include (but are not limited to) insights about how people have coped with environmental disasters or abrupt changes in the past; defining sustainability thresholds for farming or resource exploitation; distinguishing the baseline natural and human contributions to environmental changes. Ultimately, we would like to understand how strategies of human resilience and innovation can inform our modern policies for addressing the challenges of the emerging Anthropocene, a time frame dominated by human modulation of surface geomorphological processes and hydroclimate.

Assessing multi-temporal coastal evolution across contrasting morpho-dynamic settings remains a central challenge in reconstructing how coastal landscapes have responded to environmental change over the long term, shaping in turn the patterns of human occupation they supported. Relative sea-level history, sediment supply, and shoreline dynamics have varied considerably from one coastal context to another, and disentangling these trajectories provides the long-term perspective needed to interpret both the coastal changes observed today and those anticipated as sea level continues to rise.
The study of past coastal environments requires the integration of different types of evidence, including sedimentary archives, geomorphological features, palaeoecological proxies, archaeological remains, historical sources, and instrumental data. These records provide complementary information on the evolution of coastal systems and allow us to investigate environmental changes over a wide range of temporal scales, from millennial and centennial timescales to more recent and historical periods. Combined, these records also document how coastal landscapes have influenced human occupation, particularly for earlier periods, and how populations have in turn modified these landscapes through their activities.
This session aims to bring together work on the palaeoenvironmental evolution and human occupation of coastal areas, at whatever temporal or spatial scale, from a single stratigraphic sequence to an entire coastal system. We welcome contributions that cross disciplinary lines, drawing on geoarchaeology, geomorphology, Quaternary science, palaeoecology, and archaeology.
The main topics include:
- Reconstruction of past coastal environments and landscapes from sedimentary and geomorphological records;
- Human occupation and transformation of coastal environments through time;
- Geoarchaeological approaches to coastal landscape evolution;
- Interactions between relative sea-level change, coastal dynamics, and human societies;
- Evolution of deltas, estuaries, lagoons, wetlands, and other coastal environments;
- Palaeoenvironmental reconstruction of ancient harbours and coastal settlements;
- Coastal responses to climatic variability and extreme events at different timescales;
- Multi-proxy and interdisciplinary approaches to reconstructing past coastal environments;
- New methodological approaches for investigating long-term human–environment interactions in coastal areas.

Why do past climatic changes produce different societal outcomes across regions and through time? This session focuses on the pathways and feedbacks linking climate change, water availability, ecosystem productivity, resource landscapes, human agency, and societal changes during the Holocene and beyond. We invite empirical, theoretical, and modelling studies that identify these processes across past and present human-environment systems. Of particular interest are studies that integrate palaeoclimate and environmental records with archaeological, historical, or societal evidence; examine thresholds, feedbacks, and nonlinear responses; or use process-based, agent-based, network, complex-systems, and data-driven approaches to connect environmental forcing with human decision-making and societal change. By bridging together climate, environmental, and social perspectives, this session aims to advance a process-based understanding of why climatic changes produce diverse societal trajectories under different environmental and social context.

Indigenous Peoples have lived with active landscapes and environmental change for millennia, developing sophisticated knowledge systems grounded in long-term observation, oral traditions, cultural practices, and enduring relationships with place. These knowledge systems provide important insights into Earth surface processes, including volcanic activity, earthquakes, landslides, floods, coastal hazards, environmental change, and the stewardship of culturally significant landscapes.

Addressing complex geohazard and geoheritage challenges increasingly requires approaches that move beyond knowledge sharing towards ethical, reciprocal, and sustained partnerships. This session explores how Indigenous communities, researchers, practitioners, and decision-makers can work together to co-produce knowledge and co-develop solutions that are meaningful, locally relevant, and respectful of Indigenous rights, values, governance, and data sovereignty.

We invite contributions that examine ethical engagement practices at the interface of Indigenous knowledge and geoscience, including collaborative research design, community-led monitoring, participatory hazard assessment, geoheritage stewardship, Indigenous governance, and approaches that foster mutual learning and benefit. We particularly welcome case studies that highlight how equitable partnerships and the respectful weaving of Indigenous and scientific knowledge systems can strengthen understanding of dynamic Earth processes, support disaster risk reduction, enhance geoheritage outcomes, and build trust across knowledge communities.

By focusing on ethical and reciprocal engagement, this session aims to advance more inclusive geoscience practices and showcase pathways for co-developed geohazard and geoheritage solutions that are scientifically robust, culturally appropriate, and socially just.

The transfer of sediments and associated contaminants plays an important role in catchment ecosystems as they directly influence water quality, habitat conditions, and biogeochemical cycles. Contaminants may include heavy metals, pesticides, nutrients, radionuclides, and various organic, as well as organometallic compounds. The environmental risk posed by sediment-bound contaminants is largely determined by the sources and rate at which sediments are delivered to surface water bodies, the residence time in catchments, lakes, and river systems, as well as biogeochemical transformation processes. However, the dynamics of sediment and contaminant redistribution is highly variable in space and time due to the complex non-linear processes involved. This session focuses on sources, transport pathways, storage, re-mobilization, and travel times of sediments and contaminants across temporal and spatial scales, as well as their impact on freshwater ecosystems.

This session particularly addresses the following key themes:
1) Sources and Pathways of Sediment and Contaminant Transfer
Understanding how sediments and contaminants originate from natural and human sources (e.g., agriculture, urban areas, mining, industry) and move through the land, river, lake, and reservoir continuum.
2) Transport Dynamics and Environmental Controls
Investigating the transport, retention, remobilization, and transformation of sediments and contaminants, including the influence of biogeochemical processes, human activities (such as hydropower and flood management), and changing environmental conditions.
3) Innovative and Cost-effective Monitoring and Modelling Methods
Developing and applying novel, low-cost, and open-source methods to quantify sediment and pollutant fluxes across different spatial and temporal scales.
4) Impacts on Ecosystems and Landscapes
Assessing how sediment and contaminant dynamics affect river systems, floodplains, riparian zones, in-stream ecosystems, landforms, and geomorphological processes.
5) Long-term Change and Human Influence:
Using sediment archives, sediment budgets, and catchment-scale analyses to evaluate historical trends and understand the effects of human activities and environmental change on sediment and contaminant dynamics over time.

Rapid environmental change and increasing pressures on land and water systems highlight the need to better understand sediment dynamics across river basins. This session brings together research spanning the source-to-sink continuum, from soil erosion and sediment generation on hillslopes and uplands to sediment transport, connectivity, deposition, river processes, and reservoir sedimentation.
We welcome contributions that advance understanding through experiments, observations, monitoring, remote sensing, modelling, and data-driven approaches, including sediment tracing and fingerprinting. We particularly encourage studies addressing sediment dynamics under climate and land-use change, including extreme sediment-mobilizing events such as sediment-laden floods, debris flows, landslide-generated sediment pulses, and their downstream consequences.
Contributions addressing river and catchment management, reservoir sedimentation, restoration, nature-based solutions, and sustainable sediment management are also encouraged. The session aims to connect fundamental process understanding with practical applications and foster interaction among researchers working across hydrology, geomorphology, sediment transport, environmental engineering, and related disciplines. We particularly welcome contributions from early-career researchers alongside established scientists and practitioners.

Mountain ranges experience some of the fastest rates of physical erosion and chemical weathering around the world, making them one of the best places to observe sediment production and transport processes. These dynamic environments host a wide range of processes, such as rockfall, debris flow, hillslope failure, glacial and periglacial erosion, fluvial erosion, transport and deposition, and chemical weathering, that often operate simultaneously, across diverse temporal and spatial scales.

As a result, tracking the interactions between denudation, climatic forcing, tectonic activity, vegetation and land use is complex. Yet, these feedbacks affect both long- and short-term natural surface processes, landscape evolution, and human-environment interactions. Many of these processes are further intensified by climate change, posing increasing threats to the biosphere, mountain settlements and infrastructure. Understanding and quantifying rates of erosion, weathering, transport and deposition within mountain landscapes is a challenging, but crucial research topic in Earth surface processes.

We welcome contributions that (1) investigate the processes of production, mobilisation, transport, and deposition of sediment in mountain landscapes, (2) explore feedbacks between erosion and weathering due to natural and anthropogenic forcings, including climate change, and (3) examine how these processes contribute to natural hazards specific to mountain regions. We invite presentations that employ observational, analytical or modeling approaches in mountain environments across a variety of temporal and spatial scales. We particularly encourage early-career scientists to apply for this session.

River basins worldwide are increasingly confronted by a twin challenge whereby excess sediment from accelerated erosion threatens water quality, aquatic ecosystems, infrastructure and reservoir capacity (too much), whilst sediment deficits downstream compromise river, delta and coastal resilience (too little). These challenges are being amplified by climate change, land-use change, infrastructure development, pollution, resource extraction and increasing pressures on food, water and energy security. While advances in sediment science have greatly improved knowledge, significant challenges remain in translating evidence into effective policies, governance frameworks and management actions.

This session aims to advance dialogue on how scientific understanding of river basin sediment dynamics, and associated contaminants, can better support governance and decision making across the source-to-sink continuum. It interconnects with the International Sediment Initiative (ISI), a flagship initiative of the UNESCO Intergovernmental Hydrological Programme (IHP), which was established to strengthen the links between sediment science, policy and management and to promote sustainable sediment management at local, regional and global scales.

Focusing on the science-policy-practice interface for erosion & sedimentation within river basin and channel processes, we invite contributions that demonstrate how sediment science is supporting policy development, environmental regulation, river basin management, disaster risk reduction, climate adaptation and ecosystem restoration at local, national and international scales. We welcome contributions that move beyond process understanding and methodological development to examine the uptake, application and impact of sediment knowledge in decision-making contexts.

Relevant to researchers, practitioners, policymakers and international organisations, the session will provide a forum to share experiences, lessons learned and emerging approaches for translating sediment science into policy and practice, with the aim of strengthening sustainable sediment management across local to global scales.

Environmental DNA (eDNA) has become a popular biological survey tool, but its potential as a tracer of water and sediment transport remains underexplored. Understanding how eDNA signals are generated, mobilized, degraded, and preserved in water is essential not only for tracking biodiversity, but might reveal flow paths, residence time, sediment origin, and connectivity across hydrological and geophysical systems. This session is dedicated to exploring eDNA as a tracer of transport, discussing it alongside the established toolkit of hydrological tracers, including stable water isotopes, hydrochemistry, and particles such as fluorescent microspheres, bacteriophages, and spores. Recent work has demonstrated the feasibility of using eDNA to characterize flow paths and catchment response in Alpine and urban systems, and of incorporating eDNA sampling directly into hydrological monitoring and time series studies. Our primary focus is on recent-time eDNA signals in freshwater and surface waters, but we also welcome contributions that link present-day eDNA patterns to longer-term records preserved in sediment archives. Beyond rivers, we are interested in studies from wetlands, groundwater, and even lakes, coastal waters, and oceans.

Presentations in this session will address the methodologies, applications, and implications of eDNA for understanding the movement, persistence, and transformation of genetic tracer material within hydrological and geophysical systems. We encourage contributions that investigate how eDNA distribution is shaped by transport mechanisms, degradation kinetics, and environmental drivers such as flow, sediment, and biogeochemistry and what that knowledge can reveal about the underlying physical processes. Studies that integrate laboratory analyses, modeling, or sediment archives to connect scales and processes are particularly welcome. We also seek contributions that push the boundaries of how eDNA is observed. This includes innovative sampling strategies such as custom-built sensors and passive samplers, automated or distributed collection networks, and citizen science approaches that expand the spatial and temporal characterization of eDNA signal transport, concentration, and decay. By bringing together diverse systems and approaches, this session aims to advance eDNA as a tool for tracing physical transport processes, fostering new interdisciplinary collaborations between hydrology, sedimentology, and molecular methods.

Landscape evolution models (LEMs) have matured into powerful and widely used tools in the geomorphologist’s toolbox. Increasingly robust representations of weathering, erosion, sediment transport and hillslope processes allow LEMs to function as digital laboratories in which hypotheses about landscape dynamics can be explored across spatial and especially temporal scales that are impossible to directly observe.
LEMs have been used to investigate a wide range of questions, including the response of landscapes to climate and tectonic forcing; river incision and sediment transport; hillslope evolution and landslide dynamics; glacial and periglacial processes; soil formation and weathering; drainage-network development; interactions between geomorphic processes and ecosystems; and the propagation of disturbances through coupled Earth-surface systems. Their ability to represent interacting processes also offers opportunities to explore cascading natural hazards, from landslide–river interactions to chains of sediment, flooding and slope instability, making LEMs increasingly relevant to a key societal concern.
At the same time, the field is entering an exciting period of methodological tension. As process-based models, LEMs seek to encode physical mechanisms and study their emerging interactions explicitly, while AI and data-driven approaches offer powerful alternatives for identifying patterns and emulating processes. Rather than treating these approaches as competing paradigms, this tension raises fundamental questions about what we expect models to represent, how we evaluate them, and how process understanding can be combined with emerging computational methods.
This session welcomes contributions from researchers who use, modify, or develop landscape evolution models, as well as those whose research questions could benefit from the application of LEMs.

Karst areas and cave networks represent both dynamic systems and palaeoenvironmental archives, preserving records of palaeoclimate, geomorphological evolution, geodynamics, and broader palaeoenvironmental change across timescales ranging from decades to millions of years. Cave sediments, speleothems, endokarst morphologies, and associated biological and archaeological material collectively constitute a uniquely diverse and durable repository of Earth surface history.
Yet karst systems are inherently heterogeneous and complex environments. Their present-day hydrological functioning and their response to environmental change depend on this long-term evolution, which affects connectivity and flow paths within these systems. Furthermore, interpreting karst archives in terms of palaeoenvironmental reconstruction relies on understanding modern and ancient karst system processes and behaviour. Karstological and geomorphological analysis is therefore essential to decipher the complexity of the functioning and evolution of these systems, and the external forcings that control them (climate, tectonics, cryosphere, among others).
This session invites contributions that consider karst systems both as palaeoenvironmental archives and as dynamic systems, with particular attention to studies linking external forcings to karst system response. This session is explicitly interdisciplinary and welcomes contributions from palaeoclimatology, geomorphology, karst hydrology, palaeoanthropology, cryosphere research, and geodynamics. Relevant methodological approaches include, but are not limited to spatial analysis, cave monitoring, geochronology, geochemistry, geophysics, sedimentology and stratigraphy, and numerical modelling.

The action of a fluid moving over a mobile surface often generates bedforms which in turn influence the flow and how particles are transported. On Earth, bedforms are found in many environments: deserts, rivers, estuaries, continental shelves, deep seas, volcanic regions and glacial environments. Bedforms have also been observed in extra-terrestrial environments, such as on Mars and Venus.

Understanding the links between flow, particle transport, and bedform morphodynamics and stratigraphy is of interest for a wide range of applied and fundamental research. For example, this knowledge is used to manage contemporary environments, such as rivers and coastal seas. Recently, the societal relevance of bedform research has been highlighted, as bedforms are shown to interact with offshore structures. Furthermore, bedform morphology and sedimentology can provide insights into fluid movement across modern and ancient, otherwise unknown, landscapes.

This session aims to highlight many aspects of the complex interaction between flow, sediment transport, stratigraphy and bedforms in terrestrial and planetary environments. The session welcomes contributions from theoretical, field, laboratory and numerical approaches related to bedforms found in aeolian, shallow and deep waters, glacial and planetary environments. The session intends to advance our knowledge of how to decipher information contained in terrestrial and extra-terrestrial bedforms and help foster fruitful discussions on understanding bedform morphodynamics and stratigraphy.

This session welcomes all studies on Mars science and exploration. With many active missions, Mars research is as active as ever, and new data come in on a daily basis. The aim of this session is to bring together disciplines as various as geology, geomorphology, geophysics, and atmospheric science. We look forward to receiving contributions covering both past and present processes, either pure Mars science or comparative planetology (including fieldwork on terrestrial analogues), as well as modeling approaches and laboratory experiments (or any combination of those). New results on Mars science obtained from recent in situ and orbital measurements are particularly encouraged, as well as studies related to upcoming missions and campaigns (e.g., ExoMars).

The Planetary Geomorphology and Surface Processes session brings together scientists studying the formation, evolution, and erosion of landscapes on Earth and other planetary bodies in the Solar System.
Our session will provide a platform for cross-planetary discussion of the processes that generate and erode landscapes, create stratigraphy, and couple planetary surface dynamics to climatic and tectonic drivers. Considered processes could include aeolian, volcanic, tectonic, fluvial, glacial, periglacial, or as-yet "undetermined" ones.
We welcome contributions on Mars, Venus, Mercury, the Moon, icy satellites of the outer solar system, comets, and/or asteroids, to submit to our session. We believe that an interdisciplinary approach through sharing and discussing ideas across planetary borders is key in answering current problems and for the formation of new ideas. We particularly welcome contributions from early-career scientists and geomorphologists who are new to planetary science.

Currently arid to sub-humid regions are home to >40% of the world’s population, and many prehistoric and historic cultures developed in these regions. Due to the high sensitivity of drylands to also small-scale environmental changes and anthropogenic activities, ongoing geomorphological processes under the intensified climatic and human pressure of the Anthropocene, but also the Late Quaternary geomorphological and paleoenvironmental evolution as recorded in sediment archives, are becoming increasingly relevant for geological, geomorphological, paleoenvironmental, paleoclimatic and geoarchaeological research. Dryland research is constantly boosted by methodological advances, and especially by emerging linkages with other climatic and geomorphic systems that allow using dryland areas as indicator-regions of global environmental changes.
This session aims to pool contributions dealing with past to recent geomorphological processes and environmental changes spanning the entire Quaternary until today, as well as with all types of sedimentary and morphological archives in dryland areas (dunes, loess, slope deposits, fluvial sediments, alluvial fans, lake and playa sediments, desert pavements, soils, palaeosols etc.) studied on different spatial and temporal scales. Besides case studies on archives and landscapes from individual regions and review studies, cross-disciplinary, methodical and conceptual contributions are especially welcome in this session, e.g., dealing with the special role of aeolian, fluvial, gravitational and biological processes in dryland environments and their preservation in deposits and landforms, the role of such processes for past and present societies, methods to obtain chronological frameworks and process rates, and emerging geo-technologies.

Aeolian processes operate across a myriad of spatial and temporal scales both on Earth and other planetary bodies. Interactions among geochemical, atmospheric, hydrologic, biological, cyrospheric, and soil processes shape aeolian dynamics and landforms, generating feedbacks that influence evolution across scales. Yet the controls governing aeolian transport, soil erosion, dust emission, and the resulting landforms are complex, interconnected, and remain incompletely understood. Bridging observations and understanding across spatial and temporal scales is therefore critical to advancing our understanding of aeolian systems and their evolution. This session brings together research traversing the spectrum of scale, from long term landscape evolution modelling to small-scale process studies. It will be of interest to researchers that study wind-driven processes and associated bedforms in a range of environments, including, coastal, arid and hyper arid regions, vegetated landscapes, icy beds, and planetary environments. Contributions employing novel instrumentation in field or laboratory studies, remote sensing, innovative numerical modelling, theoretical approaches, or combinations of these methods are encouraged.

While African mountain terrain above 2000 m represents only 1% of the continent, it is highly diverse, extending across the Northern and Southern Hemispheres and spanning a wide range of climate zones, from tropical rainforests to arid deserts. These mountain environmental refuges signify some of the continent’s most dynamic geoecological and socio-ecological systems, encompassing important water towers, complex geomorphologies, and local communities that depend on high-altitude ecosystem services.
The long- and short-term geo-ecological evolution of African mountain areas has received limited scientific attention, including from the European geoscience community. Past and present landscape evolution and climatic change, including cryosphere development, soil processes, vegetation shifts, and slope geomorphological dynamics, have reshaped Africa’s high mountains. These changes in high-elevation environments have influenced the socio-ecological services and resources available to populations now facing increasing climate change related risks under ongoing global warming.
In this session, we invite contributions on these and related topics in African mountains, particularly those addressing past and recent landscape evolution, including millennial-, centennial-, and decadal-scale changes. We also welcome datasets from experimental areas, chronological databases, climate and environmental modeling, community-based approaches, remote sensing (satellite, InSAR, UAV) studies, and other multidisciplinary approaches that integrate the topics outlined above.

The evolution of orogens and sedimentary basins is driven by the complex interplay between crustal deformation, mantle dynamics, and climate-driven surface processes. Despite longstanding recognition of their importance, the feedback mechanisms linking erosion, sediment transport and deposition, to crustal tectonics, and mantle dynamics — including magmatism — remain an area of intense research. In particular, the overall source to sink system from eroding orogens to subsiding lacustrine or marine basins and their sedimentary infill remains elusive.

Advancing our understanding of these coupled systems requires an interdisciplinary approach. A major challenge lies in quantifying uplift, erosion, subsidence, and sedimentation, while distinguishing the respective roles of crustal deformation, mantle flow, and climate-driven processes — each acting across different spatial and temporal scales and often leaving overlapping signals in the geological record.

This session brings together comprehensive studies that integrate observational data (e.g., field studies, geophysical and well data, thermochronology), theoretical frameworks, and both analogue and numerical modelling. Our goal is to foster dialogue between disciplines and highlight innovative approaches that bridge mantle, lithospheric, crustal, and surface processes.
We welcome contributions that explore the coupling of tectonics and surface processes, including the roles of climate, erosion, sedimentation, and deep Earth dynamics in shaping the Earth's surface over time.

Earth topography and its subsurface are the result of complex interactions between tectonics and climate. Sediments in the shallow subsurface contain resources including water and energy that are vital for mankind. They also provide temporary and long-term waste and energy storage. At the same time active deformation and rapid climate change interact posing significant risk for natural hazards such as debris flow, hillslope instabilities, and active faulting. To address these pressing challenges in the realm of Earth-climate interactions, it is imperative to enhance our expertise in connecting extensive datasets with deterministic forward models. This session aims to bring together research on climate - surface processes - tectonics interactions across a wide range of spatial and temporal scales using big-data informed models focussing on fundamental questions: (1) What are the short- and long-term interactions of the tectonic-surface process feedback system? (2) What is the influence of on-going climate change on the frequency and magnitude of rapid geomorphic events such as landslides and debris flow and how is this influenced by surface morphology and environmental conditions? (3) How is the subsurface responding to short-term climate variability including anthropogenic climate change and how does this affect water and energy resources? (4) How do tectonic processes such as mountain building, continental rifting, and mantle flow respond to changes in global climatic events and surface-mass transfers and how do inherited structures control this response? (5) How can we integrate and exploit big data in the Earth sciences to better constrain coupled geodynamic, surface process, and climate models?

Interactions between tectonics, climate, and surface processes govern the evolution of mountain belts and sedimentary basins, yet the strength, timescales, and consequences of these couplings remain poorly constrained. Robust first-order quantitative constraints are therefore needed. These can be derived from geomorphic and sedimentary archives such as longitudinal river profiles, fluvial and marine terraces, landslides, downstream fining trends, growth strata, sediment provenance, sequence stratigraphy, and shifts in depositional environments. Complementary insights can be gained from geodetic analyses (e.g., GPS, UAV, satellite imagery) and innovative geoinformatic approaches. Increasingly, the integration of geochronological methods for quantifying erosion rates and source-to-sink sediment fluxes with landscape evolution, stratigraphic, climatic, and tectonic models is advancing our understanding of how these systems interact across scales.

We invite contributions that use geomorphic, geochronologic and/or sedimentary records to understand tectonic deformation, climate histories, and surface processes, and welcome studies that address their interactions and couplings at a range of spatial and temporal scales. In particular, we encourage coupled catchment-basin studies that take advantage of numerical/physical modelling, geochemical tools for quantifying rates of surface processes (cosmogenic nuclides, low-temperature thermochronology, luminescence dating) and high resolution digital topographic and subsurface data. We invite contributions that address the role of surface processes in modulating rates of deformation and tectonic style, or of tectonics modulating the response of landscapes to climate change.

We encourage contributions from researchers with diverse expertise, backgrounds, and career stages. We particularly welcome interdisciplinary approaches that bring together different fields, methods, and research communities.

In seismically active regions, landscape evolution and Quaternary geology give rates of crustal deformation averaged over long time intervals: marine terraces and palaeoshorelines, fluvial terraces and river profiles yield uplift and fault throw rates and, through fault geometry, extension or shortening rates. Shorter intervals are covered by other records. Palaeoseismology, coastal geology and archaeoseismology span centuries to millennia and, like the geological rates, record permanent deformation on identified structures. GNSS and InSAR geodesy span years to decades and measure ongoing strain loading, part of which may never become permanent offset.

This session brings these timescales together and asks whether, where and why the resulting rates are comparable. Several explanations are possible and rarely tested against one another: the long-term rate may contain a regional component the fault did not produce; the geodetic rate may include elastic strain never released as permanent offset; deformation may be distributed across structures a fault-based model does not include; or the slip rate may genuinely have changed, because clustering, fault interaction and fault growth make rates non-steady over exactly the intervals being compared. Distinguishing between these explanations, rather than documenting the discrepancy, is what the session asks for.
We invite contributions that derive long-term deformation rates from landscape evolution and Quaternary geology, compare them with palaeoseismological and geodetic rates in the same region, and diagnose the reasons for agreement or disagreement.

Studies from all tectonic settings are welcome, from landscape evolution modelling to seismic hazard applications. Early career scientists are strongly encouraged to submit.

Deltas and estuaries are dynamic landscapes shaped by interactions among river flow, tides, waves, sediment transport, and biota. Their hydrology and geomorphology support ecosystems and human activities, while interactions with ecological and biogeochemical processes influence their physical evolution. Accelerating sea-level rise, changes in river discharge and sediment supply, extreme storms and floods, subsidence, and human interventions are reshaping the delicate balance of processes that sustain these environments. Understanding how landscapes respond to these pressures, including nonlinear responses and thresholds of change, is essential for assessing their future trajectories and developing effective adaptation and management strategies.
This session brings together research on the biophysical processes shaping deltaic and estuarine landscapes and on strategies for their adaptation, restoration, and sustainable management. It aims to connect understanding of hydrological and biogeomorphological responses to climatic and anthropogenic pressures with the assessment of management interventions.
We welcome research on the hydrology, morphodynamics, and biogeomorphology of deltas and estuaries, for example addressing river–marine interactions, sediment transport and budgets, feedback between biota and sediment dynamics, and morphological change. Contributions may address the effects of sea-level rise, changing river discharge, storms and floods, subsidence, and human activities, including nonlinear landscape responses and the implications of crossing thresholds. Contributions on adaptation, restoration, and management are equally welcome, including studies of nature-based solutions and conventional engineering approaches grounded in an understanding of physical processes, biogeomorphological interactions, and landscape dynamics. The session embraces theoretical, numerical, and data-driven approaches, including AI, as well as field observations, remote sensing, and experimental studies. We encourage interdisciplinary contributions that connect understanding of physical and biogeomorphological processes with decisions about the future of deltas and estuaries.

Coastal and submarine environments are among the most dynamic landscapes on Earth, continuously reshaped by the interplay of hydrodynamic processes, sediment transport, tectonics, land subsidence, sea-level change, climate variability, and anthropogenic activities. Understanding the evolution of these interconnected systems is increasingly important in the face of accelerating climate change, growing coastal populations, and expanding offshore development. Recent advances in remote sensing, marine geophysics, bathymetric mapping, LiDAR, InSAR, unmanned aerial systems (UAS), numerical modelling, and field observations have substantially enhanced our ability to investigate geomorphic processes and landscape evolution across the land–sea continuum.
This session welcomes contributions investigating the evolution, morphodynamics, and sedimentary processes of coastal and submarine environments across a wide range of spatial and temporal scales. We encourage studies focusing on beaches, deltas, estuaries, tidal flats, coastal dunes, rocky coasts, cliffs, barrier systems, continental shelves, submarine canyons, submarine landslides, and other coastal and marine landforms. Contributions addressing shoreline evolution, land subsidence, relative sea-level rise, sediment budgets, coastal erosion and accretion, sediment connectivity, and interactions between terrestrial and marine geomorphic processes are particularly encouraged.
We especially welcome multidisciplinary studies integrating field observations with remote sensing, satellite data, LiDAR, InSAR, bathymetric surveys, seismic reflection, magnetic and other geophysical datasets, GIS analyses, machine learning, and process-based numerical modelling to improve our understanding of geomorphic evolution and sediment dynamics. Contributions exploring climate change impacts, coastal hazards, ecosystem resilience, nature-based solutions, and sustainable coastal management are also encouraged.
The session aims to provide a platform for coastal geomorphologists, marine geologists, geophysicists, remote sensing specialists, natural hazard scientists, and numerical modellers to exchange ideas, foster interdisciplinary collaborations, and advance our understanding of the processes shaping coastal and submarine landscapes across the land–sea continuum.

Global coastal zones are of high ecological and societal values. As the dynamic interface between land, sea, and air, they are heavily impacted by a combination of climate-driven environmental change and human interventions. Approaches to sustainably manage the coastal zone increasingly seek to provide co-benefits of risk mitigation, climate regulation, preserving biodiversity, and supporting coastal community resilience. These require scientific evidence and discourse that integrate across disciplines.
This session invites multi- and inter-disciplinary contributions focusing on coastal processes, their dynamic interactions, and their role in exchanges across coastal interfaces (e.g. land-sea, air-sea, river-sea, …) under a changing climate and changing human activities. We welcome observational, modelling and theoretical studies reporting on processes linked to coastal hydrodynamics, coastal biogeochemistry, coastal ecology, or coastal sediment dynamics and geomorphology. Studies may span the wide range of spatial and temporal scales characteristic of existing and projected change in coastal seascapes and landscapes from the inner shelf shoreward to reefs, seagrass meadows, beaches and dunes, estuaries, intertidal flats, mangrove forests, saltmarshes and coastal wetlands. We encourage the submission of holistic Earth system studies that explore the role of the coastal zone in coastal sea dynamics including exchanges across coastal interfaces under the impact of climate change and human activities. We also encourage studies that focus on impacts of coastal management or coastal adaptation approaches on coastal processes and dynamics, spanning engineered, hybrid, and nature-based options related to dynamic anthropogenic activities such as coastal protection, tourism, shipping, fisheries and aquaculture, and the expansion of renewable energies and other coastal infrastructure.

The growing demands on marine space for energy security and renewable infrastructure, such as offshore wind farms, are complicated by the challenges of climate change-induced hazards and the need for environmentally sustainable development. Addressing these challenges requires a holistic and interdisciplinary approach that integrates ocean and marine sciences, marine and geotechnical engineering, geomorphology, natural hazards, and environmental science. Such an approach is essential for improving our understanding of the interactions between climate change, seabed processes, infrastructure performance, and ecosystem health across the entire life cycle of offshore assets.
This session invites contributions that advance our collective capacity to plan, design and manage offshore infrastructure that is both climate-resilient and environmentally sustainable. Key themes include, but are not limited to:
• Marine geomorphology and seabed processes: characterization of seabed morphology, sediment dynamics, erosion and deposition, and their evolution in offshore environments.
• Offshore geohazards identification: mapping and assessing geohazard potential, towards a holistic geological understanding of submarine mass movement initiation and evolution, particularly landslides.
• Geohazards and infrastructure modelling, monitoring and characterization: application of state-of-the-art data science, hydroacoustic, geophysical and in-situ monitoring approaches, and development of novel physical/numerical modelling to predict initiation, development and runout of sediments and performance of offshore infrastructure.
• Climate-resilient design: novel approaches and case studies coupling engineering optimisation with ecological and geomorphological considerations for building and retrofitting critical offshore infrastructure to withstand climate-induced hazards.
We particularly encourage contributions showcasing cross-disciplinary research, including those developed within intersectoral and international consortia. By bringing together diverse perspectives, this session aims to foster a new vision for a sustainable and resilient future for the coexistence of offshore infrastructures and the marine environment.

Coastal wetlands, such as salt marshes, mangroves, seagrass beds, and tidal flats provide numerous ecosystem services, including coastal protection, biodiversity provision and climate change mitigation. However, coastal wetlands are under pressure from both natural and anthropogenic drivers of coastal change, and shifting climatic boundary conditions, hence are declining in area and habitat quality globally. At the same time, these environments are increasingly in the focus of restoration and nature-based solutions for coastal adaptation, where the aim is to work with, rather than against, the natural processes to build and maintain wetlands. Understanding how sedimentation, vegetation establishment, and self-organisation sustain these systems is therefore essential to designing interventions that remain functional over decadal timescales. This is the case for pristine, natural, managed, and restored systems alike.
This session will bring together studies of coastal wetlands across different climates and geomorphological settings to enhance the understanding of ecosystem service provisioning, interactions between hydrodynamics, sediment, and ecology, and to identify best future management practices and effective nature-based solutions. Studies of all processes occurring within coastal wetlands are invited. This includes, but is not limited to, hydro- and morphodynamics, bio-morphodynamics, bio-geochemistry, ecological change and evolution, and impacts and management implications of climate change, sea level rise, and anthropogenic pressures. We equally invite social science and interdisciplinary contributions, including stakeholder participation and co-design in wetland restoration, governance and institutional arrangements, public perception and acceptance of coastal nature-based solutions, and the distribution of costs, benefits and ecosystem services among coastal communities. This session aims to enhance our understanding of basic processes governing coastal wetland dynamics and to propose sustainable management solutions for contemporary environmental pressures.

Underwater landscapes, from shallow coastal zones to deep ocean, are shaped by a complex interplay of geologic, biologic, oceanographic and anthropogenic processes. These dynamic interactions create diverse landforms that reveal valuable insights into the underlying mechanisms driving their formation. Understanding these processes, which operate across varying spatial and temporal scales, is essential for assessing offshore geohazards and ensuring the sustainable management of marine environments. This interdisciplinary session explores the causes and consequences of processes shaping submarine landforms and seafloor evolution. Topics include erosional and depositional dynamics, marine bioconstructions, gravitational driven and current-induced sediment transport, submarine landslides, active deformation, volcanic activity, faulting and folding, and emphasis is given to subseafloor fluid migration and venting at the seafloor. Contributions may address marine or lacustrine environments across all physiographic regions, including coastal zones, marginal seas, continental shelves and slopes, oceanic plateaus, abyssal hills, mid-ocean ridges and accretionary wedges. We welcome studies that integrate diverse approaches, such as satellite-derived and hydroacoustic seabed characterizations, visual and ROV-based observations, seismic imaging and sedimentary, geochemical, and/or geological sampling. Such interdisciplinary studies provide exciting opportunities to advance quantitative geomorphology, extend it offshore, and deepen our understanding of the processes shaping submarine landscapes.

Icehouse conditions have characterized the evolution of Earth's surface over multiple timescales. Their recurrence and intensity are paced by the interplay among surface and deep-seated processes, as well as astronomical forcing. Under colder climate conditions, landscapes are modified by the physical action of ice masses, including polar ice sheets, high-elevation and high-latitude ice caps, and valley glaciers. Each stage of landscape evolution can be traced through erosion of the substrate beneath and around the ice bodies, and through the subsequent transport and deposition of eroded material. Tracing these sediment-routing pathways is a key tool for understanding past and present ice dynamics.
Through numerical modeling of sediment and provenance proxies, it is possible to investigate how glacial landscapes are eroded and evolve in response to climate variability and tectonics through time.
We especially welcome contributions focusing on, but not limited to, the Cenozoic, encompassing the development of high-latitude polar environments and the recurrent advances and retreats of mountain glaciers during the Quaternary. We encourage studies employing approaches that bridge sedimentology, geomorphology, and related disciplines, including cosmogenic nuclides, thermochronology, detrital geochronology, geochemical provenance tracer, and petrographic and mineralogical characterization of grains. Contributions integrating these techniques with remote sensing, GIS-based analyses, and numerical modeling are encouraged.

Debris-covered glaciers are found everywhere on Earth (and on other planets) and are becoming more widespread with climate warming. Understanding the effects of supraglacial debris on glacier mass balance and dynamics, and the geomorphic processes that govern debris supply, transport, and landscape evolution, is therefore required to explore the evolution of debris-covered glaciers and improve projections of global changes in glacier volumes and their downstream impacts. We invite the vibrant community of researchers working on debris-covered glaciers to share their most recent advances in this session. We welcome submissions on all aspects of debris-covered glacier research including but not limited to: the dynamics of debris-covered glaciers, glacier surface energy and mass balance, surface processes such as ice cliffs and supraglacial ponds, supraglacial debris properties, debris-covered glacier hydrology, interactions with slope processes and surrounding geomorphology, landscape evolution linked to debris-covered glaciers, and the influence of supraglacial debris on near-surface meteorology. Methodological developments for studying debris-covered glaciers are also welcome, including; novel field observation techniques, remote sensing analyses at local or global scales, and glacier models or machine-learning approaches applied to debris-covered glaciers.

Northeast Greenland occupies an important position within the Arctic, linking the Greenland Ice Sheet and ice-free terrestrial landscapes with the Arctic Ocean and Greenland Sea. Geologically and environmentally, the region has undergone major change associated with the opening and deepening of Fram Strait, the onset and intensification of Arctic–Atlantic water exchange, the early formation of ephemeral glaciers, the later build-up of the Greenland Ice Sheet, and its repeated expansion and retreat throughout the Quaternary. Ice-core records from EGRIP provide insights into past climate and ice-sheet dynamics, while observations of the Northeast Greenland Ice Stream and its outlet glaciers reveal ongoing changes in one of the ice sheet's major drainage systems. Under ongoing anthropogenically forced warming, Northeast Greenland is particularly sensitive to Arctic amplification, resulting in rapid changes across its terrestrial, cryospheric, marine and atmospheric systems. Understanding these changes, their interactions and their future trajectories requires integration across disciplines and timescales.
We invite contributions from marine, cryospheric, terrestrial and atmospheric research focused on Northeast Greenland, extending from eastern North Greenland to northern East Greenland. Studies that improve our understanding of the region across geological timescales through the present and into the future, using geological and palaeoenvironmental archives, ice-core records, contemporary observations, process studies, remote sensing and numerical modelling, are all invited. We particularly encourage studies that explore connections among systems, including the dynamics and evolution of the Northeast Greenland Ice Stream, ice-sheet–ocean interactions, atmospheric and oceanic forcing, freshwater and sediment fluxes, ocean circulation and sea ice, long-term landscape evolution and its interactions with glaciation, permafrost dynamics, and terrestrial and marine ecosystem change.

Rapid retreat of glaciers and icesheets in the Arctic is exposing increasingly extensive ice-free land margins. These unique environments are at the distinct interface between active glacial systems and their surrounding landscapes: they are geomorphologically inherited from past and ongoing deglaciation yet remain dynamically coupled to the ice masses they border, through meltwater, sediment, and permafrost degradation. This proximity distinguishes them from more distal periglacial or paraglacial settings and drives a characteristic, but still poorly integrated, suite of surface processes, including permafrost thaw and associated ground instability, coastal erosion and progradation, vegetation and surface change, fluvial and glacio-fluvial sediment transport, relative sea-level change, and natural hazards such as landslides and glacial lake outburst floods. These transforming landscapes also represent spaces where local communities pursue traditional livelihoods and practices.
This session invites contributions addressing any of these processes, individually or in combination, within ice-free land margins across the Arctic, spanning the full transition zone from the ice margin to the coast, including, but not limited to, Greenland, Svalbard, Iceland and Canada. We welcome studies using field observations, remote sensing, geochronology, numerical modelling, or process-based approaches, at timescales ranging from contemporary monitoring to Holocene reconstruction. We particularly encourage contributions that examine linkages between processes (e.g. how permafrost thaw modulates sediment delivery to coasts, or how deglaciation history conditions present-day landscape sensitivity), and comparative studies across regions. By bringing together researchers working on different processes within this shared setting, the session aims to build a more integrated understanding of how these environments are responding, and will continue to respond, to sustained ice-mass loss.

Mountain glaciers record climate change over a wide range of temporal and spatial scales. They are providing valuable and high-resolution archives of Quaternary and Holocene environmental variability while also serving as sentinels of modern and future climate dynamics. As mountain regions respond rapidly to the current Climate Change, there is an increasing need for research that not only reconstructs past glacier extent and dynamics but also integrates these insights with models, remote sensing, and emerging analytical techniques to understand the processes shaping these high-altitude environments today and in the future.

This session invites contributions that advance understanding of mountain glaciations through various methodological approaches, including the integration of geomorphological mapping, geochronology, numerical modelling, and paleoclimate analysis. Studies addressing cross-regional comparisons, hemispheric linkages, and interdisciplinary frameworks are particularly encouraged, as are those that connect Quaternary glaciations with contemporary glacier change, hazards, and water resource management. By bringing together researchers from a range of disciplines and regions, this session aims to provide a platform for both consolidating established knowledge and introducing innovative perspectives, fostering collaboration across temporal, spatial, and disciplinary boundaries.

Present-day glacial and periglacial processes in cold regions, i.e. arctic and alpine environments, provide modern analogues to processes and climatic changes that took place during the Pleistocene, including gradual retreat or collapse of ice sheets and mountain glaciers, thawing and shrinking of lowland permafrost and the location and evolution of rock glaciers. Current geomorphological and glaciological changes in mid-latitude mountain ranges could also serve as a proxy for future changes in high-latitude regions within a context of climate change. Examples are speed-up or disintegration of creeping permafrost features or the relictification of rock glaciers. Rock glaciers are highly relevant in various fields of research, such as geomorphology, hydrology, geohazards, paleo-permafrost and climate impact studies. Despite their significance, their complex interactions with environmental variables and the impact of climate change on their evolution remain incompletely understood.

For our session we invite contributions that either:
1. investigate present-day glacial and/or periglacial landforms, sediments and processes to describe the current state, to reconstruct past environmental conditions and to predict future scenarios in cold regions; or
2. have a Quaternary focus and aim at enhancing our understanding of past glacial, periglacial and paraglacial processes, also through the application of dating techniques; or
3. discuss innovative methodologies and interdisciplinary approaches, aiming to improve the understanding of past and/or present processes and to assess future rock glacier evolution.

Case studies that use a multi-disciplinary approach (e.g. ranging from observations to modelling, from geophysical to remote sensing methodologies, from site-specific to regional studies in diverse geographic regions of the World) and/or that highlight the interaction between the glacial, periglacial and paraglacial cryospheric components in cold regions are particularly welcome.

Glaciers cover roughly 10 percent of the Earth’s surface and help shape landscapes and relief in high latitude regions and many mountain ranges. Subglacial processes, such as sliding, create material that shapes the landscape. Debris that falls upon the ice, or is entrained in it, is advected down glacier to where it melts out, creating moraines. Existing sediment below the glacier can be mobilized by pressurized subglacial water and is then transported in proglacial rivers or deposited in lakes or fjords. Global glacial retreat is increasingly producing new ice-free areas in various geomorphological settings, from high-mountain valleys to coastal lowlands. The associated losses include decreased provision of meltwater in summer, reduced surface albedo and associated cooling effects, and in some cases increased natural hazards resulting from paraglacial geomorphic processes. However, there may be potential benefits, such as carbon storage in the vegetation, soil development and enlargement of pasture lands in now-exposed glacial sediments. An integrated, multi-disciplinary projection of the future properties and value of deglaciated valleys remains elusive but is necessary as we prepare for an uncertain future under climate change.

This session aims to improve understanding of glacier dynamics, surface processes, soil and plant development in glacial and deglaciating environments, and their interactions. We therefore invite contributions using experiments, modeling, laboratory, field observations and archives or remote sensing methods, or a combination thereof, that evaluate glacial processes, surface processes, soil development, ecological processes and their feedbacks. We welcome submissions that address these processes across a wide range of timescales, from sub-daily to multi-millennial, including those focused on these dynamics during past climate variations. Additionally, we are interested in studies that are focused on diverse glaciated environments from small alpine glaciers to ice sheets, improve methodology, are multidisciplinary or from previously understudied mountain regions – including in the global south. Research that addresses the changes that occur as climate warms and how these processes interact with other aspects of the Earth system, including glacier dynamics, is of particular interest for this session.
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The evolution of glaciers, ice caps, and ice sheets can have a profound impact on the Earth system. Ice mass growth and decay results in the fluctuation of sea levels, alteration of global air and ocean circulation patterns, sculpting of the landscape, and reorganisation of continental drainage. Landforms and sediments provide important information about the dimensions, distribution, and dynamics of former ice masses. This record can be used to understand ice dynamics, reconstruct climate, and refine our understanding of the future response of ice masses to variations in climate. The glacial geological record is also often compared with observations of the modern-day processes at work on Earth. The aim of this session is to bring together researchers focused on reconstructing past glaciations and understanding glacial processes at all spatial scales and from all parts of the world. We welcome studies of all relevant aspects, for example (i) glacial landforms and sediments, (ii) glacial reconstructions and chronologies, (iii) glaciologic and climatic interpretations, and (iv) numerical modelling. While the focus of the session will be Quaternary glaciations, studies from any geological period are encouraged to fully address the diversity of the topic.

Fluvial systems cover much of the Earth’s surface; they convey water, sediments, and essential nutrients from the uplands to the sea, intermittently transferring these materials from the river channel to the adjacent floodplain. The routing of sediment and water through the channel network initiates complex process-form interactions as the river bed and banks adjust to changes in flow conditions. Despite their ubiquity, little is known about the landform-driven morphodynamic interactions taking place within the channel that ultimately determine patterns of sedimentation and changes of channel form. Furthermore, an understanding of how these process-form interactions scale with the size of the fluvial system is also currently lacking. Recent technological and methodological advances now allow us to study and to quantify these process-form interactions in detail across a range of spatial and temporal scales.
This session aims to bring together interdisciplinary researchers working across field, experimental, and numerical modelling approaches who are advancing methods and providing new insights into: (i) sediment transport and morphodynamic functioning of fluvial systems, (ii) evaluating morphological change at variable spatial and temporal scales, such as at event vs. seasonal scales, and (iii) investigating the sedimentology of these river systems. We particularly welcome applications that investigate the morphodynamic response of fluvial systems in all types and sizes, and we would specifically like to encourage submissions from early career researchers and students.

The combined effects of climate change, ageing and expanding infrastructure, and historical human alterations are having an increasingly significant impact on rivers, estuaries and coastal systems. The interaction between water flows, sediment dynamics and hydraulic infrastructure can generate significant hazards, including scouring, erosion, channel instability, sedimentation and structural vulnerability. These hazards can severely impact the performance, safety and sustainability of infrastructure.
Although advances in monitoring, modelling and remote sensing have improved our understanding of flow-sediment-structure interactions, translating this knowledge into risk-informed decision-making remains a significant challenge. The increasing frequency of extreme events, changing hydrological regimes, rising sea levels and evolving sediment dynamics require new approaches that integrate process understanding with infrastructure resilience, vulnerability assessment, asset management and climate adaptation.
This session aims to bring together researchers and practitioners from the fields of geomorphology, hydraulics, engineering, climate adaptation and infrastructure management. Contributions addressing field observations, laboratory experiments, numerical modelling, monitoring technologies, digital twins, nature-based solutions and AI-supported approaches are particularly encouraged.
The focus will be on interdisciplinary approaches that connect hydraulic and sediment-induced forcing with hazard assessment, resilience planning and long-term infrastructure management, in order to support more robust and adaptive decision-making in changing environmental conditions.

Topics include, but are not limited to:
• Flow and sediment-induced hazards affecting infrastructure
• Flow-structure-sediment interactions
• Scour, erosion and sedimentation processes
• Risk, vulnerability and resilience assessment
• Asset management and decision-support tools
• Climate adaptation of hydraulic infrastructure
• Nature-based and hybrid engineering solutions
• Remote sensing, AI and digital twins for monitoring and prediction
• Early warning systems and real-time monitoring
• Lessons learned from riverine, estuarine and coastal case studies

Upland rivers comprise the majority of the total stream length in steep regions and are the source of major rivers across the world. With distinctive features including bedrock exposure, waterfalls, coarse sediment, and shallow flow, fluvial processes are often more complex than in lowland counterparts. Inherited landscape characteristics and localized morphological features modify high-energy stream hydraulics. Hydraulics, in turn, sculpt channels, inducing feedbacks between form and process, including sediment transport and landform dynamics. For example, slope or roughness modulated by post-glacial response or variable sediment supply can alter channel equilibrium by dictating flow velocity and transport processes. Understanding these processes is fundamental to predicting how upland rivers respond to environmental change, to anticipating hazards such as floods and debris-laden flows, and to linking headwater dynamics with downstream sediment delivery, ecology, and river management.

This session explores the processes and interactive feedbacks between channel hydraulics sediment processes, and landform dynamics in upland rivers across space and time. We welcome applied, experimental, and theoretical research across field measurements, remote sensing, and numerical & physical modeling. We encourage contributions on areas including:

Hydraulic modulation of upland river sediment transport and morphodynamics
Sediment process and morphodynamic modulation of hydraulics in upland rivers
Investigations of flow resistance, sediment transport, landform evolution, and roughness in upland rivers
Experimental insights into the coupling between hydraulics, sediment transport, and morphology
Temperature-driven controls on upland river processes

Water is our planet’s most vital resource, and the primary agent in some of the biggest hazards facing society and nature. Recent extreme heat and flood events underline the significance of water both as a threat and as an increasingly volatile resource.
The accurate and timely measurement of streamflow is therefore more critical than ever to enable the management of water for ecology, for people and industry, for flood risk management and for understanding changes to the hydrological regime. Despite this, effective monitoring networks remain scarce, under-resourced, and often under threat on a global scale. Even where they exist, in-situ observational networks are increasingly inadequate when faced with extreme conditions, and lack the precision and spatial coverage to fully represent crucial aspects of the hydrological cycle.

This session aims to tackle this problem by inviting presentations that demonstrate new and improved methods and approaches to streamflow monitoring, including:
1) Innovative methodologies for measuring/modelling/estimating river stream flows;
2) Real-time acquisition of hydrological variables;
3) UAS and satellite remote sensing techniques for hydrological & morphological monitoring;
4) Measurement in extreme conditions associated with the changing climate;
5) Measurement of sudden-onset extreme flows associated with catastrophic events;
6) Strategies to quantify and describe hydro-morphological evolution of rivers;
7) New methods to cope with data-scarce environments;
8) Inter-comparison of innovative & classical models and approaches;
9) Evolution and refinement of existing methods;
10) Guidelines and standards for hydro-morphological streamflow monitoring;
11) Quantification of uncertainties;
12) Development of expert networks to advance methods.

Contributions are welcome with an emphasis on innovation, efficiency, operator safety, and meeting the growing challenges associated with the changing climate, and with natural and anthropogenically driven disasters such as dam failures and flash floods.

Additionally, presentations will be welcomed which explore options for greater collaboration in advancing riverflow methods and which link innovative research to operational monitoring.

Understanding hydrological processes in drylands, from hyperarid to semi-arid regions, is a major research challenge, particularly under increasing pressure from climate change, land-use change, and water scarcity. These regions, which span over 40% of the Earth’s land surface and support more than two billion people, face complex hydrological challenges due to their high climatic variability. Their limited water resources are characterized by strong climatic variability, intermittent flows, and complex interactions between rainfall, soils, vegetation, surface runoff, and groundwater.

This session welcomes contributions that improve our understanding of key hydrological processes in drylands (such as semi-arid zones in the Mediterranean or hyperarid ones in the Sahara and other desertic areas), including rainfall variability, infiltration and runoff generation mechanisms, antecedent soil moisture controls, hydrological connectivity, transmission losses, evapotranspiration, and groundwater recharge. We particularly encourage studies addressing the episodic and threshold-driven nature of hydrological responses, surface–groundwater interactions, and the challenges of monitoring and modeling water fluxes across scales.

Given the scarcity of long-term observations in many dryland regions, notably in the Global South, we also welcome approaches combining field observations, remote sensing, novel monitoring techniques, citizen science, and modeling. Studies examining how climate and land-use changes may alter hydrological processes and water availability are especially encouraged.

By bringing together observational, experimental, and modeling perspectives, this session aims to improve process-based understanding of dryland hydrology and identify pathways towards more resilient water systems in dryland regions.