PARK(ING) DAY DC FRIDAY SEPTEMBER 17, 2010
What are impervious surfaces?
Posted on August 8th by Chris – No Comments
Impervious surfaces - mainly artificial structures–such as pavements (roads, sidewalks, driveways and parking lots) that are covered by impenetrable materials such as asphalt, concrete, brick, and stone–and rooftops. Soils compacted by urban development are also highly impervious. (via Wikipedia)
