Effective impervious area definition

Effective impervious area means the portion of actual impervious area that is connected, or has the effect of being connected as defined in the King County Surface Water Design Manual, directly to the storm water drainage system via surface flow or discrete conveyances such as pipes, gutters or ditches.
Effective impervious area means a surface that does not readily permit liquid to infiltrate, such as asphalt streets, paved driveways, sidewalks, rooftops, which hydraulically connect to storm sewers, and parking lots.
Effective impervious area means ten percent (10%) of impervious

Examples of Effective impervious area in a sentence

  • Effective impervious area is the area of a catchment with a direct stormwater connection to stream channels.

  • Effective impervious area (EIA) is the area where there is no opportunity for surface runoff from an impervious site to infiltrate into the soil before it reaches a conveyance system (pipe, ditch, stream, etc.).

  • Effective impervious area, although developed in this report, is not recommended for use by most users in estimating peak flows at ungaged sites.

  • Effective impervious area can be costly to determine because of the time involved to measure this basin characteristic in the field.

  • Since the project site is not near any large bodies of water and is five miles inland 3 Effective impervious area includes all roofs, hardscapes, and streets plus 10 percent of the area that is in landscape that would drain to treatment areas.


More Definitions of Effective impervious area

Effective impervious area means those impervious surfaces that are connected via sheet flow or discrete conveyance to a drainage system.
Effective impervious area means the portion of actual impervious area that is connected, or
Effective impervious area means those impervious surfaces that are connected via sheet flow or discrete conveyance to a drainage system. Impervious surfaceson residential development sites are considered ineffective if: 1) the runoff is dispersed through at least 100 feet of native vegetation in accordance with BMP T5.30 – “Full Dispersion” as described in Chapter 5 of Volume V of the Stormwater Management Manual for Western Washington (20052012, amended in 2014); 2) residential roof runoff is infiltrated in accordance with Downspout Full Infiltration System sin BMP 5.10A Volume III; or 3) approved continuous runoff modeling methods indicate that the entire runoff file is infiltrated.

Related to Effective impervious area

  • Impervious area means any surface that does not allow stormwater to infiltrate into the ground.

  • Impervious surface means a surface that has been covered with a layer of material so that it is highly resistant to infiltration by water.

  • Pervious surface means an area that releases as runoff a small portion of the precipitation that falls on it. Lawns, gardens, parks, forests or other similar vegetated areas are examples of surfaces that typically are pervious.

  • Regulated impervious surface means any of the following, alone or in combination:

  • Built-Up Area and/or “Covered Area” in relation to a Flat shall mean the floor area of that Flat including the area of balconies and terraces, if any attached thereto, and also the thickness of the walls (external or internal) and the columns and pillars therein Provided That if any wall, column or pillar be common between two Flats, then one-half of the area under such wall column or pillar shall be included in the built-up area of each such Flat.

  • Modular building means, but shall not be limited to, single and multifamily houses, apartment

  • ILUA Area means the geographical area in relation to which the Framework ILUA applies, as specified in Schedule 2 of the Framework ILUA;

  • Modular building manufacturer means a person or corporation who owns or operates a

  • Geologically hazardous areas means areas that because of their susceptibility to erosion, sliding, earthquake, or other geological events, are not suited to the siting of commercial, residential, or industrial development consistent with public health or safety concerns.

  • mining areas means the areas delineated and coloured red on the Plan marked “A” initialled by or on behalf of the parties hereto for the purposes of identification;

  • Underground area means an underground room, such as a basement, cellar, shaft or vault, providing enough space for physical inspection of the exterior of the tank situated on or above the surface of the floor.

  • Infiltrative surface means designated interface where effluent moves from distribution media or a distribution product into treatment media or original soil. In standard trench or bed systems this will be the interface of the distribution media or product and in-situ soil. Two separate infiltrative surfaces will exist in a mound system and an unlined sand filter, one at the interface of the distribution media and fill sand, the other at the interface of the fill sand and in-situ soil.

  • Surface impoundment or "impoundment" means a facility or part of a facility which is a natural topographic depression, man-made excavation, or diked area formed primarily of earthen materials (although it may be lined with man-made materials), which is designed to hold an accumulation of liquid wastes or wastes containing free liquids, and which is not an injection well. Examples of surface impoundments are holding, storage, settling, and aeration pits, ponds, and lagoons.

  • Building Area means the greatest horizontal area of a building within the outside surface of the exterior walls.

  • Underground tank means a device meeting the definition of tank whose entire surface area is totally below the surface of and covered by the ground.

  • Storage area means any location, facility, or vehicle which is used to store, to transport, or to secure a radiographic exposure device, a storage container, or a sealed source when it is not in use and which is locked or has a physical barrier to prevent accidental exposure, tampering with, or unauthorized removal of the device, container, or source.

  • Common Areas is defined as all areas and facilities outside the Premises and within the exterior boundary line of the Project and interior utility raceways and installations within the Unit that are provided and designated by the Lessor from time to time for the general non-exclusive use of Lessor, Lessee and other tenants of the Project and their respective employees, suppliers, shippers, customers, contractors and invitees, including parking areas, loading and unloading areas, trash areas, roadways, walkways, driveways and landscaped areas.

  • Slum area means any area where dwellings predominate which, by reason of depreciation, overcrowding, faulty arrangement or design, lack of ventilation, light or sanitary facilities, or any combination of these factors, are detrimental to the public safety, health or morals.

  • Landscaped area means all the planting areas, turf areas, and water features in a landscape design plan subject to the Maximum Applied Water Allowance and Estimated Applied Water Use calculations. The landscaped area does not include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios, gravel or stone walks, other pervious or non-pervious hardscapes, and other non-irrigated areas designated for non-development (e.g., open spaces and existing native vegetation).

  • Acre-foot means the amount of water necessary to cover one acre of land to the depth of one foot, or 325,851 U.S. gallons of water.

  • Modular building retailer means any person who purchases or acquires a modular building from a

  • Massive Multiauthor Collaboration Site (or “MMC Site”) means any World Wide Web server that publishes copyrightable works and also provides prominent facilities for anybody to edit those works. A public wiki that anybody can edit is an example of such a server. A “Massive Multiauthor Collaboration” (or “MMC”) contained in the site means any set of copyrightable works thus published on the MMC site.

  • Covered Species means the species for which the Bank has been established and for which Credits have been allocated as set forth in Exhibit F-1.

  • Underground storage tank system means an underground storage tank and the connected underground piping, underground ancillary equipment, and containment system, if any.

  • Parking Areas means those portions of the Common Areas or other areas under Landlord’s control which from time to time are designated by the Landlord for the parking of automobiles and other automotive vehicles while engaged in business upon the Premises (other than while being used to make deliveries to and from the Premises).

  • Invasive plant species means species of plants not historically found in California that spread outside cultivated areas and can damage environmental or economic resources. Invasive species may be regulated by county agricultural agencies as noxious species. Lists of invasive plants are maintained at the California Invasive Plant Inventory and USDA invasive and noxious weeds database.