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R <br />(22) "Wet Detention Pond" means a structure that provides for the storage and <br />control of runoff and includes a designed and maintained permanent pool volume. <br />(23) "Vegetative Buffer" means an area of natural or established vegetation directly <br />adjacent to surface waters through which stormwater runoff flows in a diffuse manner to <br />protect surface waters from degradation due to development activities. The width of the <br />buffer is measured horizontally from the normal pool elevation of impounded structures, <br />from the bank of each side of streams or rivers, and from the mean high water line of tidal <br />waters, perpendicular to the shoreline. <br />(24) "Vegetative Filter" means an area of natural or planted vegetation through <br />which stormwater runoff flows in a diffuse manner so that runoff does not become <br />channelized and which provides for control of stormwater runoff through infiltration of <br />runoff and filtering of pollutants. The defined length of the filter shall be provided for in the <br />direction of stormwater flow. <br />(25) "One -year, 24 -hour storm" means a rainfall of an intensity expected to be <br />equaled or exceeded, on average, once in 12 months and with a duration of 24 hours. <br />(26) "BMP" means Best Management Practice. <br />(27) "Permeable pavement" means paving material that absorbs water or allows <br />water to infiltrate through the paving material. Permeable pavement materials include <br />porous concrete, permeable interlocking concrete pavers, concrete grid pavers, porous <br />asphalt, and any other material with similar characteristics. <br />(28) "Residential development activities" has the same meaning as in 15A NCAC 02B <br />.0202 (54). <br />(29) "Vegetative conveyance" means a permanent, designed waterway lined with <br />vegetation that is used to convey stormwater runoff at a non - erosive velocity within or <br />away from a developed area. <br />History Note: Authority G.S. 143 -213; 143- 214.1; 143- 214.7; 143- 215.3(a)(1); <br />Eff. January 1, 1988; <br />Amended Eff. August 1, 2012 (see S. L. 2012 -143, s.1. ()9); July 3, 2012; December 1, 1995; September 1, 1995. <br />