How to Say "runoff" in Spanish
The Spanish word for “runoff” is “drenaje” — B1 level.

Examples
El sistema de drenaje de la ciudad colapsó por la tormenta.
The city's drainage system collapsed because of the storm.
Están limpiando el drenaje para evitar inundaciones.
They are cleaning the drains to prevent flooding.
El drenaje de este campo de fútbol es excelente.
The drainage of this soccer field is excellent.
Always Masculine
Words ending in '-aje' in Spanish are almost always 'boy' words (masculine). Use 'el' or 'un' with them.
Talking about the System
Use this word when talking about the whole system of pipes, not just the small hole in your sink.
Drenaje vs. Desagüe
Mistake: “Using 'drenaje' for the kitchen sink hole.”
Correction: Use 'desagüe' for a single drain hole (like in a sink or tub) and 'drenaje' for the larger system or process.
Related Translations
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