沭河流域洪水预报的产汇流组合方案优选

针对沂沭泗流域洪水预报问题，选择沭河流域重沟站洪水事件为研究对象，评估了两种产流方法和三种坡面汇流方法的不同组合下洪水模拟精度。 结果表明，CN 曲线数法是研究区最优的产流计算方法，斯奈德单位线和 SCS 单位线均适用于该流域的坡面汇流；CN 曲线数-斯奈德单位线组合是沭河流域最优的产汇流组合方案，洪水预报精度达到乙级以上。

Combination scheme optimization of runoff generation and overland flow for flood forecasting in Shuhe River Basin

Aiming at the problem of flood forecasting problems in Yishusi Basin, the flood events of Chonggou station in Shuhe River Basin were selected as the research object, and the flood simulation accuracy under different combinations of two runoff generation schemes and three overland flow schemes was evaluated. The resultsshowed that the CN curve number method was the best runoff generation scheme, and Snyder unit hydrograph and SCS unit hydrograph were suitable for overland flow routing in the basin. The combination scheme of CN curve number Snyder unit hydrograph wasthe best combination scheme of runoff generation and overland flow in the Shuhe River Basin, and the accuracy of flood forecasting is above class B with the combination scheme.