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DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES <br />• <br />U <br />MULCHING <br />Definition <br />Application of plant residues or other suitable materials to the soll surface. <br />Purposes <br />1. To prevent erosion by protecting the soil surface from raindrop impact and reducing the <br />velocity of overland low. <br />2. To foster the growth of vegetation by increasing available moisture and providing <br />insulation against extreme heat and cold. <br />From: Environmental Protection Agency, 1976 <br />Figure C-5-Mulching <br />• <br />9-1-99 C-23 <br />Urban Drainage and Flood Control District