any surface in the urban landscape that cannot effectively absorb or infiltrate rainfall; for example, sidewalks, rooftops, roads, and parking lots.
Anything that stops rainwater from soaking into the ground, including roads, sidewalks, driveways, parking lots, swimming pools, and buildings.
Surfaces where the infiltration of water is impossible.
Longer Description Material that water cannot go through, such as roadways and roof tops. Term Acronym Source
Surfaces that do not allow rainfall to infiltrate into the soil such as pavements, roofs, sidewalks, driveways, etc.
Land surfaces with a low capacity for soil infiltration, e.g. parking lots and roadways; degrades water quality by increasing surface runoff and the quantity of nonpoint source pollution.