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• Table 6.2 Permissible Velocities for Channels Ll ned with Ve getation.l <br />The vnluea apply to average uniform stands of each type of <br />cover (Soil Conservation Service, 1954). <br />• <br />Permissible velocity (fps) <br />Slope <br />Cover Range2 Erosion Easily <br />(percent) resistant soils eroded aolls <br /> 0-S 8 6 <br />Sermudagrasa 5-10 7 S <br /> over 10 6 d <br />Buffnlograae <br />Kentucky bluegrass 0-5 7 5 <br />Smooth brome 5-10 6 4 <br />Hlue grams over 10 5 3 <br /> 20-5 5 4 <br />Grass mixture 5-10 6 3 <br />Lespedeza sericea <br />Weeping lovegzase <br />Yellow bluestream 70-5 7.5 2.5 <br />Kudzu <br />Alfalfa <br />Crabgrass <br />Common lespedeza4 50-5 7.5 2.5 <br />Sudangrass2 <br />1Uae velocities exceeding S teas per second only where good covers and <br />proper maintenance can ba obtained. <br />2Do not use on elopes steeper then 10 percent except [or side elopes in <br />a combination channel. <br />;Do not use on slopes steeper than 5 percent ezcepc for side elopes in <br />a combination channel. <br />dMnuals--used on mild slopes or as eamQorary protection until permanent <br />covers era established. <br />SUSe on elopes steeper than 5 parcene is not recommended. <br /> <br />