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<br />(e <br /> <br />13 <br /> <br />Table 6. Drainage Basin Parameters for SWMM. <br /> <br />Parameter <br /> <br />Boxelder Creek <br /> <br />Cooper Slough <br /> <br />SUBCATCHMENT <br /> <br />Slope (foot/foot) <br /> <br />Width (feet) <br /> <br />Area (acres) <br /> <br />Impervious Area <br />(percent) <br /> <br />Roughness (n) <br />(impervious) <br /> <br />(e <br /> <br />Roughness (n) <br />(pervious) <br /> <br />Depression and Detention <br />(impervious) (inches) <br /> <br />Depression and Detention <br />(pervious) (inches) <br /> <br />Infiltration Rate <br />(maximum) (inches/hour) <br /> <br />Infiltration Rate <br />(minimum) (inches/hour) <br /> <br />Infiltration Decay Rate <br /> <br />CHANNEL <br /> <br />Width (feet) <br /> <br />Slope (foot/foot) <br /> <br />Roughness (n) <br /> <br />0.0036 - 0.030 <br /> <br />0.0038 - 0.010 <br /> <br />700 - 10,000 <br /> <br />700 - 6,730 <br /> <br />29.8 - 467.3 <br /> <br />99.4 - 1,172 <br /> <br />2 - 8S <br /> <br />6 - 90 <br /> <br />0.013 0.013 <br />0.120 O. 120 <br />0.062 0.062 <br />0.2 - 0.3 0.2 - 0.3 <br />1.0 - S.O 0.5 - 1.0 <br />0.2 - 0.6 0.3 - 0.7S <br />0.001 0.001 <br /> <br />1 - 350 <br /> <br />8 - 26 <br /> <br />0.001 - 0.012 <br /> <br />0.0017 - 0.010 <br /> <br />0.03S - 0.040 <br /> <br />0.040 - O.OSO <br /> <br />(. <br /> <br />-c:~ <br />