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<br /> <br /> <br />Figure ll. --QJldwater River near Red Banks, Miss. <br /> <br />Computed roughness coefficient: Manning's n = 0.11 <br /> <br />Date of flood: February 22, 1971 <br /> <br />Date of picture: April 5, 1979 <br /> <br />Depth of flow on flood plain: 3.0 ft <br /> <br />Description of flood plain: The vegetation of the flood plain consists <br />mostly of trees including oak, gum, and ironwood. The base is silty <br />soil that has slight surface irregularities. Few obstructions with <br />some flood debris. Ground cover is short weeds and grass with little <br />undergrowth. Vegd = 0.0090 and C* = 8.6. The selected values <br />are nb = 0.020, nl = 0.003, n4' = 0.005, and no = 0.028. <br /> <br />29 <br />