English-Finnish translations for runoff

That portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area. That which is lost without entering the soil is called surface runoff. That which enters the soil before reaching a stream channel is called ground water runoff or seepage flow from ground water. --
Dissolved chemicals, etc, included in such water
A second or further round of an indecisive election, after other candidates have been eliminated

The runoff of nitrates is poisoning the lake.
There will now be a runoff as neither front runner received more than 50% of the vote.

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