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A Geomorphologically-Based Runoff Prediction Model: Case Study of Two Gauged Watersheds in Saudi Arabia

by Mohamed N. Allam, Cairo Univ, Giza, Egypt, Cairo Univ, Giza, Egypt,
Khalid S. Balkhair, Cairo Univ, Giza, Egypt, Cairo Univ, Giza, Egypt,



Document Type: Proceeding Paper

Part of: Engineering Hydrology

Abstract:

Using the Geomorphologic Instantaneous Unit Hydrograph (GIUH) and via the convolution transformation, a linear discharge hydrograph prediction model is obtained. Infiltration in streams is represented with a linear function of surface runoff; equals an infiltration coefficient multiplied by the streamflow discharge. Two problems are addressed; (1) estimation of the infiltration coefficient, and (2) estimation of the surface runoff velocity. Analysis of these problems are carried out through applications for two gauged watersheds in Saudi Arabia. A comparison between predicted and observed hydrographs, for representative storms, is presented.

Subject Headings: Runoff | Infiltration | Hydrographs | Geomorphology | Watersheds | Hydrologic models | Water discharge | Saudi Arabia | Middle East | Asia

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