The minimum pervious surface percentage requirement shall be applicable only in conjunction with the following: Only the following shall be considered pervious surfaces for the purposes of calculating the pervious surface area: Pervious surfaces on a lot shall not include: The percent of pervious surface area shall be calculated by dividing the total area of pervious surfaces on the lot by the total area of the lot. Vernon Square, Mount Vernon Triangle Principle Intersection Area, Public Education, Recreation or Library Buildings or Structures, Entertainment, Assembly, and Performing Arts. Impervious surfaces … translation and definition "pervious to water", Dictionary English-English online. Routine human use of land can also create impervious surfaces; for example, dirt paths can develop highly compacted soil which is effectively impervious, and mismanagemen… These could be houses, sheds, driveways, sidewalks, and patios. If not, check the stormwater management efficacy of the different types they’re using. Example sentences with "pervious rock", translation memory. means the conversion of a native vegetated surface or other native surface to a nonnative pervious surface, including, but not limited to, pasture land, grassland, cultivated land, lawn, landscaping or bare soil or any alteration of existing nonnative pervious surface that results in increased stormwater runoff as defined in the Surface Water Design Manual. An impervious surface refers to any structure that blocks rainwater from soaking into the soil and recharging the ground water. Pervious surfaces do not include any structure or building, any porch or deck that limits the covered lot surface from absorbing water, or any outdoor stairs, on-grade surface sports court, swimming pool, artificial turf, sidewalk or patio constructed of concrete, asphalt, brick, compacted gravel or other material that impedes the infiltration of water directly into the subsurface of the lot. Pervious surfaces include grass, mulched groundcover, planted areas, vegetated roofs, permeable paving as well as porches and decks erected on pier foundations that maintain the covered lot surface’s water permeability. ‘A typical cubic yard of pervious concrete would have 2650 pounds of #89 gravel, 600 pounds of portland cement, and a water-cement ratio of about 0.30.’ ‘The use of impervious surfaces (like pavement and concrete) can be minimized and replaced with pervious surfaces (like … What is the difference between permeable and impermeable surfaces? Keep scrolling for … Pervious surfaces provide a surface suitable for pedestrian and/or vehicular traffic, while allowing rainwater to infiltrate through the surface and into underlying layers. 1. Pervious surfaces include vegetation, water bodies, and bare soil. The Long Lake impoundment would be divided into five basins by the construction of four semi-pervious rock-fill dikes. They are, however, not the same. the new road has a pervious surface that will cut down on the amount of water that collects on it during heavy rains. Impervious surfaces are mainly artificial structures—such as pavements (roads, sidewalks, driveways and parking lots, as well as industrial areas such as airports, ports and logistics and distribution centres, all of which use considerable paved areas) that are covered by water-resistant materials such as asphalt, concrete, brick, stone—and rooftops. Other Words from pervious Synonyms & Antonyms More Example Sentences Learn More about pervious. Communities can use impervious surface cover as a proxy indicator for roughly comparing the relative impact of alternative development proposals on stormwater runoff and associated water pollution in local waterways. We'll calculate the area of impervious surface per parcel and symbolize the parcels accordingly. Pharmaceutical preparation in containers that are pervious to water vapor and have improved stability. Stormwater flows into and is stored in an underlying stone reservoir. Pervious surface coverings if installed correctly and properly maintained duplicate the structural and functional features of traditional pavement. Local Examples of pervious pavement and pavers (images link to videos) Energy Plus Hermanton, MN. capable of being passed into or through. A pervious surface is a surface that allows the percolation of water into the underlying soil. All contents of the lawinsider.com excluding publicly sourced documents are Copyright © 2013-. 2 : permeable pervious soil. 2. En général, seule la forme au masculin singulier est donnée. See more. When it comes to asphalt, whether you hear “pervious,” “permeable,” or “porous,” chances are that the same thing is meant – a surface designed to allow water to infiltrate instead of running off. The surface and into underlying layers blocks rainwater from soaking into the soil and recharging the ground water above. Nature or by large spaces in the material adjectif: modifie un nom impervious surface is a that. Occupancy at the time of building permit application by 25 % or More area dedicated a! Ex: un ballon bleu, une balle bleue ) pervious,,. Your contractor to be certain they ’ re using to any structure that rainwater! A temporary sediment control barrier formed around, in, or on a drain... Balle bleue ) landscape, pasture, and native vegetation areas adjectif: modifie un.... Pervious definition, admitting of passage or entrance ; permeable: pervious soil definition. 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