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Chapter 4-Site-Specific Industrial Storm Water BMPs • <br />Permanent Seeding and Planting <br />What Is It <br />Permanent seeding of grass and planting trees and brush provides stabilization to the soil by <br />holding soil particles in place. Vegetation reduces sediments and runoff to downstream areas by <br />slowing the' velocity of runoff and permitting greater infiltration of the runoff. Vegetation also <br />filters sediments, helps the soil absorb water, improves wildlife habitats, and enhances the <br />aesthetics of a site. <br />4 O1?1?,??s1?J'ild=??.?jV?l?;?lk <br /> <br /> <br />CNE `(e» A> TC?t? ?'vG <br />FIGURE 4.15 ESTABLISHING PERMANENT COVER WITH <br />VEGETATION <br />(Modified from State of North Carolina, 1988) <br />When and Where to Use It <br />Permanent seeding and planting is appropriate for any graded or cleared area where long-lived plant <br />cover is desired. Some areas where permanent seeding is especially important are filter strips, <br />buffer areas, vegetated swales, steep slopes, and stream banks. This practice is effective on areas <br />where soils are unstable because of their texture, structure, a high water table, high winds, or high <br />slope. When seeding in northern areas during fall or winter, cover the area with mulch to provide a <br />protective barrier against cold weather (see Mulching). Seeding should also be mulched if the <br />seeded area slopes 4:1 or more, if soil is sandy or clayey, or if weather is excessively hot or dry. <br />Plant when conditions are most favorable for growth. When possible, use low-maintenance local <br />plant species. Install all other erosion control practices such as dikes, basins, and surface runoff <br />control measures before planting. <br />What to Consider <br />For this practice to work, it is important to select appropriate vegetation, prepare a good seedbed, <br />properly time planting, and water and fertilize. Planting local plants during their regular growing <br />• <br />• <br />4-64