Application of alternative hydrograph separation models to detect changes in flow paths in a watershed undergoing urban development

Paul T Gremillion, Allison Gonyeau, Martin Wanielista

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Runoff characteristics in a low-gradient central-Florida watershed were analysed using environmental δ18O and a series of conservative-tracer mass-balance models applied to a storm event (109 mm over approximately 30 h) monitored in May and June 1993 on the Econlockhatchee River, Florida. The assumption of steady-state conditions implicit in the widely used two-component mixing model was tested by applying steady-state and non-steady-state models for a subcatchment (215 km2) of the river. Both models indicated that about 76% of the resulting river flow was composed of pre-storm water. A third mass-balance model (steady-state) was developed to separate pre-storm from storm-event runoff over a discrete reach of the river, which had a contributing area of 135 km2. This model indicated that approximately 47% of the water entering the reach could be attributed to pre-storm water. The greater proportion of event water entering the reach was attributed to suburban development in the watershed and indicates that urbanization in watersheds not only affects the timing, peak and total runoff, but also may change flow-paths for runoff, and may significantly affect downstream water quality. Copyright (C) 2000 John Wiley and Sons, Ltd.

Original languageEnglish (US)
Pages (from-to)1485-1501
Number of pages17
JournalHydrological Processes
Volume14
Issue number8
DOIs
StatePublished - Jun 15 2000
Externally publishedYes

Fingerprint

hydrograph
urban development
watershed
runoff
mass balance
river
water
river flow
urbanization
tracer
water quality

Keywords

  • Hydrograph separation
  • Hydrologic mass balance
  • Isotope hydrology
  • Oxygen stable isotopes

ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Application of alternative hydrograph separation models to detect changes in flow paths in a watershed undergoing urban development. / Gremillion, Paul T; Gonyeau, Allison; Wanielista, Martin.

In: Hydrological Processes, Vol. 14, No. 8, 15.06.2000, p. 1485-1501.

Research output: Contribution to journalArticle

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