a structure or excavation at the foot of a chute, drop, or spillway to reduce open the energy of the descending runoff or stream
A stilling basin is a basin constructed to dissipate the energy of fast flowing water. The stilling basin area is located just downstream of the spillway crest between the training/retaining walls.
A basin downstream from a dam that receives the discharge from tunnels or conduits or overflow from a spillway.
Short area beyond a dam spillway where water is controlled prior to release.
A pool, usually lined with reinforced concrete, located below a spillway, gate, or valve into which the discharge dissipates energy to avoid downstream channel degradation.
A basin constructed so as to dissipate the energy of fast-flowing water, e.g., from a spillway or bottom outlet, and to protect the riverbed from erosion.