丹江口入库洪水与坝址洪水关系研究

以汉江流域的丹江口水库为研究对象,基于水库建库前后的洪水资料,采用流量叠加法、水量平衡法、马斯京根演算法等方法推求入库洪水和坝址洪水,建立入库洪水与坝址洪水的洪峰流量和不同时段洪量的关系,研究不同方法推求的入库设计洪水成果的差异。研究结果表明:丹江口入库洪水与坝址洪水的关系可近似用线性关系表示,洪峰流量较时段洪量的相关性略差,随着时段的增长,入库洪量与坝址洪量趋于接近;采用典型年法推求入库设计洪水,不同典型年推求的入库设计洪峰和短历时洪量成果差别较大,用入库洪水与坝址洪水关系法推求的入库设计洪水成果代表平均值。研究成果可为丹江口水库防洪调度运行提供参考。

Study on relationship between inflow flood and dam-site flood of Danjiangkou Reservoir

Taking Danjiangkou Reservoir on the Hanjiang River Basin as the research object, flow superposition method, water balance method, and Massingen algorithm were used to calculate the inflow flood and dam-site flood according to the flood data before and after the reservoir construction. The relationship of the inflow flood and dam-site flood were established in terms of peak flood flow and flood volumes of different duration. The differences of designed inflow floods derived from different methods were studied. The research results showed that the relationship between inflow flood and dam-site flood of Danjiangkou reservoir can be described by a linear relation approximately, that the indicators of flood volumes of different durations have a higher correlation compared with the peak flood flow. As the time duration increases, the flood volume of the inflow flood and dam-site flood tend to be close. In calculating the design inflow flood by the typical year method, the deduced results of flood peak flow and flood volumes of short duration by different typical years are quite different. The design inflow flood results deducted by the relationship between inflow flood and dam-site flood represent a average condition. The research results can provide reference for flood control operation of Danjiangkou reservoir.