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<br /> <br /> <br />'.... <br /> <br />'1. ') ~_"t"j. <br />,. . .i'.?1 <br />" t'\ <br />, :W <br /> <br />f'" ' J, <br /> <br />Figure 9.--Bayou de Loutre near Farmerville, La. <br /> <br />Computed roughness coefficient: Manning's n = 0.11 <br /> <br />Date of flood: March 18, 1973 <br /> <br />Date of picture: February 14, 1979 <br /> <br />Depth of flow in flood plain: 3.7 ft <br /> <br />Description of flood plain: The vegetation of the flood plain consists <br />mostly of trees including oak, gum, ironwood and pine. The base is <br />firm soil that has slight surface irregularities and obstructions <br />caused by downed trees and limbs. Ground cover and undergrowth are <br />negligible. Vegd = 0.0072 and C* = 8.0. The selected values <br />are nb = 0.020, nl = 0.002, n3 = 0.003, and no = 0.025. <br /> <br />27 <br />