治ち山さんダム

noun

erosion-control dam; soil-saving dam

Technical term in civil engineering and forestry for a dam built to prevent erosion and stabilize slopes.

• この地ち域いきには治ち山さんダムがいくつか設せっ置ちされている。

  Several erosion-control dams have been installed in this area.

• 治ち山さんダムは土ど砂しゃ災さい害がいを防ふせぐ役やく割わりを果はたす。

  Erosion-control dams play a role in preventing sediment disasters.