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.