A Study on Real-time Predictions of Flood Runoff Using Spatially Distributed Rainfall Data

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  • Study on Real time Predictions of Flood

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A new method for real-time predictions of flood runoff using effective information of rainfall spatially distributed was developed. In this method, a single basin of moderate size was divided into sub-basins so that the rainfall characteristics could be treated as uniform in each sub-basin. The method consists of two stages. One is to update the state vectors in the subbasins by using the filtering theory, the other is to compose runoff from the sub-basins as the total flood runoff by using the kinematic wave theory. An actual river basin was used for verification of the method. Results of the application showed that this method had better capability than the simple method of thinking of the basin as a single unit. The influences of rainfall forecasting and discharge measurement accuracy on flood prediction were also discussed with simulation data generated by the method.

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