Swash zone
The zone of wave action on the beach, which moves as water levels vary, extending from the limit of run-down to the limit of run-up. (US Army Corps of Engineers, Coastal and Hydraulics Laboratory Glossary, 2015)
The zone of wave action on the beach, which moves as water levels vary, extending from the limit of run-down to the limit of run-up. (US Army Corps of Engineers, Coastal and Hydraulics Laboratory Glossary, 2015)