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Estimation of peak streamflows for unregulated rural streams in Kansas

Water-Resources Investigations Report 2000-4079

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Abstract

Peak streamflows were estimated at selected recurrence intervals (frequencies) ranging from 2 to 200 years using log-Pearson Type III distributions for 253 streamflow-gaging stations in Kansas. The annual peak-streamflow data, through the 1997 water year, were from streamflow-gaging stations with unregulated flow in mostly rural basins. A weighted least-squares regression model was used to generalize the coefficients of station skewness. The resulting generalized skewness equation provides more reliable estimates than the previously developed equation for Kansas. A generalized least-squares regression model then was used to develop equations for estimating peak streamflows for sites without stream gages for selected frequencies from selected physical and climatic basin characteristics for sites without stream gages. The equations can be used to estimate peak streamflows for selected frequencies using contributing-drainage area, mean annual precipitation, soil permeability, and slope of the main channel for ungaged sites in Kansas with a contributing-drainage area greater than 0.17 and less than 9,100 square miles. The errors of prediction for the generalized least-squares-generated equations range from 31 to 62 percent.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Estimation of peak streamflows for unregulated rural streams in Kansas
Series title:
Water-Resources Investigations Report
Series number:
2000-4079
Edition:
-
Year Published:
2000
Language:
ENGLISH
Publisher:
U.S. Department of the Interior, U.S. Geological Survey ; Information Services [distributor],
Description:
iv, 33 p., (2 folded) :ill., col. maps ;28 cm.