Guide for selecting Manning's roughness coefficients for natural channels and flood plains
Although much research has been done on Manning's roughness coefficients for stream channels, very little has been done on the selection of roughness values for densely vegetated flood plains. A procedure for the determination of Manning's roughness coefficient (n) for channels and flood plains analyzes the different roughness factors that affect the roughness coefficients for channels and flood plains. By determining the value of each factor and combining those values, the n value can be determined. Another procedure deals with densely vegetated flood plains where 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 are presented as a comparison standard to aid in assigning n values to similar flood plains
eBook, English, [1984]
U.S. Dept. of Transportation, Federal Highway Administration ; National Technical Information Service [distributor], [Washington, D.C.?], Springfield, Va., [1984]
1 online resource (vi, 62 pages) : illustrations (some color), forms
1031346528
Introduction
Approach
Method for assigning n values for channels
Methods for assigning n values for flood plains
Photographs of flood plains
Procedures for assigning n values
Summary
Selected references
Cover title
Distributed to depository libraries in microfiche
"April 1984."
"Report no. FHWA-TS-84-204."
"HRD-10/4-84(2M)P"--Page 4 of cover
Electronic reproduction, [Place of publication not identified], HathiTrust Digital Library, 2018