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<br /> <br /> <br />, " <br /> <br />'I <br />V <br />, 1. <br />V: <br />r I <br />. J ' <br /> <br />Figure 7.--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: 3.6 ft <br /> <br />Description of flood plain: The vegetation of the flood plain consists <br />mostly of large, tall trees, including oak, gum, ironwood, and <br />pine. The base is firm soil and is smooth. Obstructions are few <br />and ground cover and undergrowth are sparse. Vegd = 0.0067 and <br />C* = 8.8. The selected values are nb = 0.020, nl = 0.002, <br />n3 = 0.003, and no = 0.025. <br /> <br />25 <br />