洗せん掘くつ

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.

• 橋きょう脚きゃくの周まわりで洗せん掘くつが進すすんでいる。

  Scouring is progressing around the bridge pier.

• 河か床しょうが洗せん掘くつされて深ふかくなった。

  The riverbed was scoured and became deeper.