| Soil Erosion, Sediment Dynamics and River Processes: From Land Degradation to Catchment Transport Processes
HS9
Soil Erosion, Sediment Dynamics and River Processes: From Land Degradation to Catchment Transport Processes
Co-organized by GM1/SSS2
Convener: Tirusew AbereECSECS | Co-conveners: Olivier EvrardECSECS, Amaury Frankl, Vesna Zupanc, Ivan LizagaECSECS

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).