Impervious ground cover definition
Impervious ground cover means those hard surfaces which either prevent or impede the entry of water into the soil in the manner that such water entered the soil under natural conditions preexistent to development, or which cause water to run off the surface in greater quantities or at an increased rate of flow than that present under natural conditions preexistent to development, including, without limitation, such surfaces as rooftops, greenhouses, asphalt or concrete sidewalks, paving, unnamed ways-of-travel, driveways and parking lots, walkways, artificial turf playing fields, patio areas, storage areas, and gravel, oiled macadam or other surfaces which similarly affect the natural infiltration or runoff patterns that existed prior to development.
Impervious ground cover means those hard surfaced areas either which prevent or retard the entry of water into the soil in the manner that such water entered the soil under natural conditions preexistent to development, or which cause water to run off the surface in greater quantities or at an increased rate of flow than that present under natural conditions preexistent to development, including without limitation such surfaces as roof tops, asphalt or concrete sidewalks, paving, driveways and parking lots, walkways, patio areas, storage areas, oiled macadam or other surfaces which similarly affect the natural infiltration or runoff patterns existing prior to development, provided, gravel surfaces without an impervious surface underneath the gravel shall not be considered impervious ground cover for purposes of this chapter.