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DRAINAGE CRITERIA MANUAL (V. 3) CONSTRUCTION BEST MANAGEMENT PRACTICES <br /> <br />MULCHING <br />Definition <br />Application of plant residues or other suitable materials to the soil surface. <br />Pumoses <br />1. To prevent erosion protecting the soil surface from raindrop impact and reducing the <br />velocity of ovedandllow. <br />2. To foster the growth of vegetation by increasing available moisture and proving <br />insulation against extreme heat and cold. <br />t-rom: tnwronmentai rrotection Agency, 19tb <br />Figure C-5-Mulching <br /> <br />9-1-99 C-23 <br />Urban Drainage and Flood Control District