Development of regression models to estimate flow duration statistics at ungaged streams in Oklahoma using a regional approach

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Abstract

Multiple-regression analysis was used to develop equations for estimating annual and seasonal flow-duration statistics at ungaged streams in and near Oklahoma that are not substantially affected by human alteration. Ordinary least-squares and left-censored (Tobit) multiple-regression techniques were used to develop equations that relate these statistics, from continuous streamflow data at gaged locations with 10 or more years of record, to physical and climatic basin characteristics. Separate equations were developed to estimate these statistics for stations within similar hydrologic and geologic regions. Use of separate regressions by region substantially improved the accuracy of the estimate for streams in eastern and central Oklahoma when compared with estimating equations developed for the entire State, especially for regressions estimating lower flow duration values. For all regions, the equations were more reliable for estimating higher flow duration values. The accuracy of regressions for estimating flow duration statistics in western Oklahoma was very poor, especially for lower flow duration values.

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Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Development of regression models to estimate flow duration statistics at ungaged streams in Oklahoma using a regional approach
DOI 10.1061/41036(342)486
Year Published 2009
Language English
Publisher American Society of Civil Engineers
Contributing office(s) Oklahoma Water Science Center
Larger Work Type Conference Paper
Larger Work Title World Environmental & Water Resources Congress 2009 great rivers
First page 1
Last page 13
Conference Title World Environmental & Water Resources Congress 2009 great rivers
Conference Location Kansas City, Missouri
Conference Date May 17-21 2009
Country United States
State Oklahoma
Online Only (Y/N) N
Additional Online Files (Y/N) N