An area covered with solid material or that is compacted to the point where water can not infiltrate underlying soils (e.g. parking lots, roads, houses, patios, swimming pools, tennis courts, etc.). Stormwater runoff velocity and volume can increase in areas covered by impervious surfaces.
Waterproof ground cover that does not allow for infiltration of water (e.g., roofs, parking lots, roads) and which increases the volume and speed of runoff after a rainfall.
Hard, non-porous surfaces such as roads, parking lots, and rooftops that prevent precipitation from soaking into the ground, thus increasing surface runoff.
ground cover such as roofs, driveways and roadways that does not allow water to sink into (infiltrate) the soil. Impervious surfaces increase the volume and speed of runoff after rainfall.
A soil or surface through which water, air, or roots penetrate slowly or very little (that is, concrete, compacted soil).
Surface (such as pavement) that does not allow, or greatly decreases, the amount of infiltration of precipitation into the ground.
a man-made area that will not readily absorb water as it falls
Those surfaces in the landscape that can not infiltrate rainfall, such as rooftops, pavement, sidewalks, driveways and compacted earth.
Any surface through which rainfall cannot pass or be effectively absorbed. (Roads, buildings, paved parking lots, sidewalks etc.)
Surfaces which do not allow rainwater to penetrate into the underlying soil
Exterior covering that does not allow rainwater or snowmelt to infiltrate into the soil but rather causes it to run off and enter the stormwater system via street drains. Rooftops, driveways, sidewalks, and streets are common impervious surfaces in cities.
Any hard surface material such as asphalt or concrete which limits infiltration and induces high runoff rates.
paved surface or other land cover that does not allow water to percolate into the ground.
A surface that cannot be penetrated by water such as pavement, rock, or a rooftop and thereby prevents infiltration and generates runoff.
Any material which reduces or prevents absorption of water into land.
Surface through which water cannot penetrate, such as roof, road, sidewalk, and paved parking lot. The amount of impervious surface increases with development and establishes the need for drainage facilities to carry the increased runoff.
A surface that acts as a barrier to the downward movement of water (from rain and snowmelt) into the soil. Refers to a human generated surface with lower ability to allow water to pass through than the original natural surface.
A surface that cannot be easily penetrated. For instance, rain does not readily penetrate asphalt or concrete pavement.
a surface, such as pavement or a structure, that prevents water from infiltrating the underlying soil.
Any land area covered by buildings or paved with a hard surface such that water cannot seep through the surface into the ground.
A surface that cannot absorb water, and prevents the soil from absorbing the water. Concrete is an impervious surface, as are most roads, driveways, and buildings.
A surface which does not allow water to pass through.
Hard ground cover that prevents or retards the entry of water into the soil and increases runoff, such as asphalt, concrete, rooftops
land cover that prevents filtration of water or sediments down into the ground ( e.g., asphalt)
A hard surface area that either prevents or retards the entry of water into the sail mantle or causes water to run off the surface in greater quantities or at an increased rate of flow. Common impervious surfaces include, but are not limited to, rooftops, walkways, patios, driveways, parking lots, storage areas, concrete or asphalt paving, and gravel roads.
A surface that does not allow water or other liquids to pass through it (for example, pavement).
A paved or other hard surface that does not allow water to penetrate.
Non-porous surfaces, or surfaces that water cannot permeate. Such surfaces include development footprints, cement, and asphalt.
Impervious surfaces are artificial structures, such as pavements and building roofs, which replace naturally pervious soil with impervious construction materials.