Hydrologic Effects of Brush to Grass Conversion

by D. A. Woolhiser, USD-ARS, Aridland Watershed, Management Research Unit, United States,
D. C. Goodrich, USD-ARS, Aridland Watershed, Management Research Unit, United States,
W. E. Emmerich, USD-ARS, Aridland Watershed, Management Research Unit, United States,
T. O. Keefer, USD-ARS, Aridland Watershed, Management Research Unit, United States,



Document Type: Proceeding Paper

Part of: Watershed Planning and Analysis in Action

Abstract:

A physically based rainfall-runoff model is used to detect hydrologic response to artifically induced vegetation changes on a semiarid watershed. Model parameters are optimized using a subset of rainfall-runoff events from the period prior to the induced changes. Simulated results are produced by both the mathematical model and a paired watershed regression relationship. Anomalous model results are explained making use of the regression results. Model error is partially attributed to small changes in hydrologic response and the selection of the optimization set.

Subject Headings: Mathematical models | Hydrologic models | Rainfall-runoff relationships | Optimization models | Vegetation | Watersheds | Errors (statistics)

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