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

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DOI: 10.1061/41036(342)486

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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. ?? 2009 ASCE.

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
ISBN:
9780784410363
DOI:
10.1061/41036(342)486
Volume
342
Year Published:
2009
Language:
English
First page:
4819
Last page:
4831
Number of Pages:
13
Conference Title:
World Environmental and Water Resources Congress 2009: Great Rivers
Conference Location:
Kansas City, MO
Conference Date:
17 May 2009 through 21 May 2009