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Guide for selecting Manning's roughness coefficients for natural channels and flood plains

Water Supply Paper 2339

By:
,

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Abstract

Although much research has been done on Manning's roughness coefficient, n, for stream channels, very little has been done concerning the roughness values for densely vegetated flood plains. The n value is determined from the values of the factors that affect the roughness of channels and flood plains. In densely vegetated flood plains, the major roughness is caused by trees, vines, and brush. The n value for this type of flood plain can be determined by measuring the vegetation density of the flood plain. Photographs of flood-plain segments where n values have been verified can be used as a comparison standard to aid in assigning n values to similar flood plains.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Guide for selecting Manning's roughness coefficients for natural channels and flood plains
Series title:
Water Supply Paper
Series number:
2339
Edition:
-
Year Published:
1989
Language:
ENGLISH
Publisher:
U.S. G.P.O. ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey,
Description:
v, 38 p. :ill. (some col.) ;28 cm.