Sediment continuity and large wood retention at sediment retention basins (CaSTOR)

The project investigates how sediment retention basins can be designed to allow sufficient sediment continuity during small floods (HQ_2–30), while safely retaining sediment and large wood during major events (HQ_50–100).

The objective is to provide practical guidance for the planning and optimization of both new and existing structures. Key questions address the definition of bedload continuity, threshold values for impairment by large wood, effective mechanical retention structures, and system behavior under overload conditions.

Methodologically, the project combines stakeholder surveys, field measurements at two sites, and laboratory experiments focusing on rack designs and integrated system concepts. The results will be prepared in a practice-oriented format, disseminated nationwide within Switzerland, and published scientifically to ensure sustainable knowledge and technology transfer.