surface runoff

Noun

countable uncountable

Overland flow of excess water (with or without accumulated contaminants) that cannot be absorbed by the ground as infiltration.

Japanese Meaning

地表に溜まった過剰な水分（汚染物質が付着している場合もある）が、地面に浸透せず横流れする現象

After the heavy storm, surface runoff carried oil and sediment from the parking lot into the nearby stream.

集中豪雨の後、地面に浸透できない余剰水の地表流出によって、駐車場の油や堆積物が近くの小川に運ばれた。

Sense（1）

Overland flow of excess water (with or without accumulated contaminants) that cannot be absorbed by the ground as infiltration.

surface runoffs

（ plural ）