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  2. Impervious surface - Wikipedia

    en.wikipedia.org/wiki/Impervious_surface

    Impervious surface percentage in various cities. The percentage imperviousness, commonly referred to as PIMP in calculations, is an important factor when considering drainage of water. It is calculated by measuring the percentage of a catchment area which is made up of impervious surfaces such as roads, roofs and other paved surfaces.

  3. Storm Water Management Model - Wikipedia

    en.wikipedia.org/wiki/Storm_Water_Management_Model

    The walls of a planter extend 3 to 12 inches above the soil bed to allow for ponding within the unit. The thickness of the soil growing medium ranges from 6 to 24 inches while gravel beds are 6 to 18 inches in depth. The planter's capture ratio is the ratio of its area to the impervious area whose runoff it captures.

  4. Stormwater fee - Wikipedia

    en.wikipedia.org/wiki/Stormwater_fee

    A stormwater fee is a charge imposed on real estate owners for pollution in stormwater drainage from impervious surface runoff.. This system imposes a tax that is proportional to the total impervious area on a particular property, including concrete or asphalt driveways and roofs, that do not allow rain to infiltrate.

  5. Urban runoff - Wikipedia

    en.wikipedia.org/wiki/Urban_runoff

    Flooded streets in New Orleans Relationship between impervious surfaces and surface runoff Urban runoff is a major cause of urban flooding , the inundation of land or property in a built-up environment caused by rainfall overwhelming the capacity of drainage systems , such as storm sewers . [ 12 ]

  6. Antecedent moisture - Wikipedia

    en.wikipedia.org/wiki/Antecedent_moisture

    Surface runoff in hydrologic systems is generally conceptualized as occurring from pervious and impervious areas. It is the pervious runoff that is affected by antecedent moisture conditions, as runoff from impervious surfaces such as roads, sidewalks, and roofs will not be significantly affected by preceding moisture levels. Pervious surfaces ...

  7. Impervious surfaces - Wikipedia

    en.wikipedia.org/?title=Impervious_surfaces&...

    What links here; Related changes; Upload file; Special pages; Permanent link; Page information; Cite this page; Get shortened URL; Download QR code

  8. Runoff curve number - Wikipedia

    en.wikipedia.org/wiki/Runoff_curve_number

    Natural desert landscaping (pervious area only) 63: 77: 85: 88 Artificial desert landscaping (impervious weed barrier, desert shrub with 1- to 2-inch sand or gravel mulch and basin borders) 96: 96: 96: 96 Urban districts Commercial and business (85% imp.) 89: 92: 94: 95 Industrial (72% imp.) 81: 88: 91: 93 Residential districts by average lot size

  9. Geospatial PDF - Wikipedia

    en.wikipedia.org/wiki/Geospatial_PDF

    The PDF format is widely accepted and is considered the de facto standard for printable documents on the web. This means that users do not require the any proprietary plug-in to read geospatial PDFs created following the PDF 1.7 specification, which was published as ISO 32000-1 standard . [ 3 ]

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