Laserfiche WebLink
<br /> <br /> <br />Figure 17.--Tenrnile Creek near Elizabeth, La. <br /> <br />Computed roughness coefficient: Manning's n = 0.15 <br /> <br />Date of flood: December 7, 1971 <br /> <br />Date of picture: April 12, 1979 <br /> <br />Depth of flow on flood plain: 4.1 ft <br /> <br />Description of flood plain: The vegetation of the flood plain is covered <br />with a mixture of large and small trees including oak, gum, and <br />ironwood. The base is firm soil that has minor surface irregulari- <br />ties caused by rises and depressions. Obstructions are negligible <br />(some exposed roots). Ground cover is negligible except for a small <br />amount of undergrowth. Vegd = 0.0067 and C* = 14.4. The <br />selected values are nb = 0.025, nl = 0.003, n3 = 0.002, and <br />no = 0.030. <br /> <br />35 <br />