Use of the continuous slope-area method to estimate runoff in a network of ephemeral channels, southeast Arizona, USA

Anne M. Stewart, James B. Callegary, Christopher F. Smith, Hoshin V. Gupta, James M. Leenhouts, Robert A. Fritzinger

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The continuous slope-area (CSA) method is an innovative gaging method for indirect computation of complete-event discharge hydrographs that can be applied when direct measurement methods are unsafe, impractical, or impossible to apply. This paper reports on use of the method to produce event-specific discharge hydrographs in a network of sand-bedded ephemeral stream channels in southeast Arizona, USA, for water year 2008. The method provided satisfactory discharge estimates for flows that span channel banks, and for moderate to large flows, with about 10-16% uncertainty, respectively for total flow volume and peak flow, as compared to results obtained with an alternate method. Our results also suggest that the CSA method may be useful for estimating runoff of small flows, and during recessions, but with increased uncertainty.

Original languageEnglish (US)
Pages (from-to)148-158
Number of pages11
JournalJournal of Hydrology
Volume472-473
DOIs
StatePublished - Nov 23 2012

Keywords

  • Continuous slope-area method application
  • Ephemeral stream channel flow gaging
  • Ephemeral stream channel runoff gaging
  • Stage data to runoff quantification

ASJC Scopus subject areas

  • Water Science and Technology

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