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Factors affecting accuracy of slope-area discharge determination of the September 1992 flood in Raven Fork, Western North Carolina

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Abstract

For the flood of September 10, 1992, in Raven Fork, Swain County, North Carolina, a peak discharge of 460 cubic meters per second was computed by using the slope-area method. Accuracy of this determination depends on suitability of the selected reach and, in particular, selection of Manning's roughness coefficients, interpretation of the high-water marks, number and placement of cross sections, presence of large expansions or contractions, state-of-flow transitions, and magnitude of the change in water-surface elevation. Some of these factors can contribute to greater uncertainties for measurements in steep mountain streams than for measurements in streams with flatter gradients.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Factors affecting accuracy of slope-area discharge determination of the September 1992 flood in Raven Fork, Western North Carolina
ISBN:
0784400377
Issue:
pt 1
Year Published:
1994
Language:
English
Publisher:
Publ by ASCE
Publisher location:
New York, NY, United States
First page:
645
Last page:
649
Number of Pages:
5
Conference Title:
Proceedings of the 1994 ASCE National Conference on Hydraulic Engineering
Conference Location:
Buffalo, NY, USA
Conference Date:
1 August 1994 through 5 August 1994