alleryHow do impervious surfaces in cities affect surface runoff?
ARunoff greatly decreases
BRunoff increases
CRunoff stops entirely
DRunoff stays unchanged
Answer & Solution
Correct answer: B. Runoff increases
1. Urbanization adds impervious surface and compacts soil.
2. This lowers infiltration capacity of soils.
3. More water stays on top, so runoff rates rise.
_Source: Wikipedia, Water cycle, Land cover and land use changes_
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