DEVELOPMENT AND EVALUATION OF A DIMENSIONLESS UNIT HYDROGRAPH

Bruce N. Wilson, J. William Brown

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

ABSTRACT: A generalized unit hydrograph method is developed and evaluated for ungaged watersheds. A key component in this method is the value of a dimensionless storage coefficient. Procedures to estimate this coefficient are given using calibrated values from 142 rainfall‐runoff events gaged in watershed located mainly in the Eastern US. Only limited success was obtained in predicting this storage coefficient. Thirty‐seven, independent rainfall‐runoff events were used to test the proposed technique. The generalized unit hydrograph predicted the observed runoff hydrographs fairly well with considerable improvement in accuracy over the SCS dimensionless unit hydrograph. Approximately one‐half of test storms had percent errors in predicted peak flow rates that were less than 34 percent compared to percent error of 88 percent with the SCS method.

Original languageEnglish (US)
Pages (from-to)397-408
Number of pages12
JournalJAWRA Journal of the American Water Resources Association
Volume28
Issue number2
DOIs
StatePublished - Apr 1992

Keywords

  • agricultural hydrology
  • hydrograph analysis and modeling
  • optimization

Fingerprint

Dive into the research topics of 'DEVELOPMENT AND EVALUATION OF A DIMENSIONLESS UNIT HYDROGRAPH'. Together they form a unique fingerprint.

Cite this