Last Updated：2025/11/20

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That portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area. / Dissolved chemicals, etc, included in such water.

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runoff

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Source Word

runoff

Noun

countable uncountable

That portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area. / Dissolved chemicals, etc, included in such water.

Japanese Meaning

降雨や灌漑により生じた水分で、地中に浸透せず蒸発もしないため、地表を流れ出る水。また、その流出水に含まれる溶解した化学物質など。

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Heavy runoff after the storm carried pesticides from the fields into the river.

Google Translation / DeepL Translation

嵐の後、土に浸透せず蒸発もしない大量の流出水が畑の農薬を川に運んだ。

Details

Sense（1）

The next series of high tides or large waves will tend to rebuild the berm and redam the stream. Ultimately, increased runoff due to fall or winter rains will raise the stream level to the point where it breaks through.

Google Translation / DeepL Translation