noun, noun or participle which takes 'suru'
scouring; erosion of a riverbed or seafloor
Technical term used in civil engineering and hydrology for the removal of sediment by water flow, often around bridge piers or coastal structures.
橋脚の周りで洗掘が進んでいる。
Scouring is progressing around the bridge pier.
河床が洗掘され
The riverbed was scoured and became deeper.