The transfer of mass and energy in hillslope and channel systems by surface processes is of prime importance for shaping upland landscapes. Understanding the process and landform sequences that result from geomorphic hillslope-channel coupling or decoupling is highly essential for quantifying sediment budgets, assessing (complex) response of geomorphic systems such as fluvial adjustment or hillslope stability, or designing rules for numerical models of landscape evolution.

In this session, we welcome both conceptual contributions and case studies on the geomorphic (de-)coupling between hillslope and channel systems in strongly human modified lowlands as well as upland regions across all climatic and tectonic regimes, including issues such as:

* Hillslope (esp. landslide) sediment production, storage, and delivery to the drainage network;
* Geomorphic feedbacks between hillslope and fluvial processes driven, for instance, by extreme events such as floods, soil erosion, gullying or landsliding episodes;
* Effects of base-level changes and knickpoint migration in both hillslope and channel systems;
* Rates, response, and adjustment times of (de-)coupling with a view toward the geomorphic legacies in upland landscapes, and their implication for landscape evolution models; and
* Hazard, risk, and other management implications.

The anticipated output of the session will be a state-of-the-art overview on current concepts, landmark studies, and possible future research directions to more efficiently integrate findings from the traditionally separated fields of hillslope and fluvial geomorphology