Design of sediment detention basins: Scaled model experiments and application

Sediment detention basins are implemented on mountain rivers to trap solid material that may aggravate the flooding of downstream settlements. However, retention structures built in past unnecessarily retain sediment during non-hazardous flood events, resulting high maintenance costs and deficit downstream. In addition, so-called spontaneous self-flushing previously retained floods has occasionally been observed. Recent research suggests design for controlling passage with a guiding channel across deposition area upstream hybrid barrier. Such barriers consist check dam slot orifice an bar screen bottom clearance order benefit from combined mechanical-hydraulic control. The present paper enhances this pioneering help new experimental data, including wide range mixtures large wood, as well variable barrier heights. Improved criteria provided regarding basin storage capacity. functionality enhanced concept is illustrated by case study physical model: protection Villard-Bonnot village (France) against torrential hazards.