Abstract
Flood disaster is an important threat to the safe operation of reservoirs. Accurate flood forecasting can provide important information for optimal reservoir operation. Generally, the characteristic of precipitation spatial distribution is analyzed based on observation of several discreet preset stations. This cannot catch the rainstorm center all the time and will lead to deviation in the characteristic of precipitation spatial distribution. Therefore, it can hardly arrive at optimal sub-watershed delineation and flood modeling. Therefore, a novel method is proposed for analysis of characteristic of precipitation spatial distribution in consideration of rainfall distribution and the delay of rainfall–runoff concentration. Based on the analysis results of precipitation spatial distribution, several key sub-basins which have significant impact on the flood process can be recognized. And then the elaborate sub-watershed delineation and flood modeling approach is put forward consequently on these key sub-basins. The efficacy of the proposed method is estimated on the flood forecasting of Zhexi reservoir watershed. The results verify that the proposed method can significantly improve the flood forecasting precision, which can provide important decision-making basis for reservoir operation.
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Acknowledgements
This work was supported by the Science and Technology Key Project of State Grid Hunan Electric Power Corporation of China (Grant No. 5216A514003Z). Special thanks are given to the anonymous reviewers and editors for their constructive comments.
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Lu, J., Guo, J., Yang, L. et al. Research of reservoir watershed fine zoning and flood forecasting method. Nat Hazards 89, 1291–1306 (2017). https://doi.org/10.1007/s11069-017-3017-x
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DOI: https://doi.org/10.1007/s11069-017-3017-x