Revision on Reservoir Inflow Design Flood under the Variation Impact of Underlying Surface
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Abstract:
Under the influence of infrastructure construction，industrial and agricultural production，ecological environment construction, and other human activities，the underlying surface of the Haihe River Basin has been changed，which leads to corresponding variation in the design flood. In this paper，based on the data of measured rainfall and runoff in the Wangkuai Reservoir，the trend and aberrance point of rainfall and flood peak were analyzed and used to identify the aberrance point in the series of reservoir inflow flood. The rainfall-runoff relationship method and the peak-volume correlation method were used to modify the series of flood volume and flood peak in the Wangkuai Reservoir, and flood frequency analysis was performed on the flood series before and after modification. The results showed that the variation of underlying surface can cause the reduction in the reservoir inflow design flood, and the corresponding flood control standard of the worst flood once in ten thousand years has decreased by 2.38%. The study of the revision on reservoir inflow design flood under then variation of underlying surface is of important significance for the adjustment of flood control measures and layout of flood control engineering.
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