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TABLES <br />Table 2.04.7 -24 Limiting Velocities and Tractive Forces for Open Channels <br />Material <br />Fine sand colloidal <br />Sandy loam noncolloidal <br />Silt loam noncolloidal <br />Alluvial silts noncolloidal <br />Ordinary firm loam <br />Volcanic ash <br />Stiff clay very colloidal <br />Alluvian silts colloidal <br />Shales and hardpans <br />Fine gravel <br />Graded loam to cobbles when <br />noncolloidal <br />Graded silts to cobbles when colloidal <br />Coarse gravel noncolloidal <br />Cobbles and shingles <br />From Lane (1955) <br />n <br />0.020 <br />0.020 <br />0.020 <br />0.020 <br />0.020 <br />0.020 <br />0.025 <br />0.025 <br />0.025 <br />0.020 <br />0.030 <br />0.030 <br />0.025 <br />0.035 <br />For Clear Water <br />Water Transporting <br />Colloidal Silts <br />Tractive <br />Velocity, <br />Force <br />fps <br />Pst <br />1.50 <br />0.027 <br />1.75 <br />0.037 <br />2.00 <br />0.048 <br />2.00 <br />0.048 <br />2.50 <br />0.075 <br />2.50 <br />0.075 <br />3.75 <br />0.260 <br />3.75 <br />0.260 <br />6.00 <br />0.670 <br />2.50 <br />0.075 <br />3.75 <br />0.380 <br />4.00 <br />0.430 <br />4.00 <br />0.300 <br />5.00 <br />0.910 <br />Water Transporting <br />Colloidal Silts <br />Tables 52 Revision Date: 6/12/12 <br />Revision No.: RN -06 <br />Tractive <br />Velocity <br />Force <br />fps <br />Pst <br />2.50 <br />0.075 <br />2.50 <br />0.075 <br />3.00 <br />0.110 <br />3.50 <br />0.150 <br />3.50 <br />0.150 <br />3.50 <br />0.150 <br />5.00 <br />0.460 <br />5.00 <br />0.460 <br />6.00 <br />0.670 <br />5.00 <br />0.320 <br />5.00 <br />0.660 <br />5.50 <br />0.800 <br />6.00 <br />0.670 <br />5.50 <br />1.100 <br />Tables 52 Revision Date: 6/12/12 <br />Revision No.: RN -06 <br />