Radar Rainfall Measurements and Runoff Forecasting

by David J. Wall, Univ of New Haven, United States,
Robert C. Shedd, Univ of New Haven, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: Rainfall varies in intensity and depth over time and space. Weather radar systems can provide estimates of rainfall at points in space with nearly continuous coverage with respect to time. A study was conducted to investigate the effects, on hydrologic forecasts, of varying the resolution of radar rainfall estimates in both time and space. A definite relationship was found to exist between the standard error of the hydrograph peaks and the radar grid spacing as well as the time interval between measurements.

Subject Headings: Radar | Rainfall-runoff relationships | Forecasting | Runoff | Hydrologic models | Grid systems | Spacing

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