catchment

詳細解釋：

catch.ment

n.（名詞）
A catching or collecting of water, especially rainwater.
集水：集水，尤指雨水的匯集收集

A structure, such as a basin or reservoir, used for collecting or draining water.
貯水池：一種用於收集或疏導水的裝置，如盆或貯水容器
The amount of water collected in such structure.
蓄水量：在此種容器中的水的收集量
A catchment area.
流域