Technique for estimating the 2- to 500-year flood discharges on unregulated streams in rural Missouri

Water-Resources Investigations Report 95-4231
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Abstract

A generalized least-squares regression technique was used to relate the 2- to 500-year flood discharges from 278 selected streamflow-gaging stations to statistically significant basin characteristics. The regression relations (estimating equations) were defined for three hydrologic regions (I, II, and III) in rural Missouri. Ordinary least-squares regression analyses indicate that drainage area (Regions I, II, and III) and main-channel slope (Regions I and II) are the only basin characteristics needed for computing the 2- to 500-year design-flood discharges at gaged or ungaged stream locations. The resulting generalized least-squares regression equations provide a technique for estimating the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year flood discharges on unregulated streams in rural Missouri. The regression equations for Regions I and II were developed from stream-flow-gaging stations with drainage areas ranging from 0.13 to 11,500 square miles and 0.13 to 14,000 square miles, and main-channel slopes ranging from 1.35 to 150 feet per mile and 1.20 to 279 feet per mile. The regression equations for Region III were developed from streamflow-gaging stations with drainage areas ranging from 0.48 to 1,040 square miles. Standard errors of estimate for the generalized least-squares regression equations in Regions I, II, and m ranged from 30 to 49 percent.

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Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Technique for estimating the 2- to 500-year flood discharges on unregulated streams in rural Missouri
Series title Water-Resources Investigations Report
Series number 95-4231
DOI 10.3133/wri954231
Edition -
Year Published 1995
Language ENGLISH
Publisher U.S. Geological Survey ; Earth Science Information Center, Open-File Reports Section [distributor],
Publisher location Richmond, Virginia
Contributing office(s) Missouri Water Science Center
Description iv, 33 p.: maps ;28 cm.
Country United States
State Missouri
Online Only (Y/N) N
Additional Online Files (Y/N) N
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