Simulation of 2021 Autumn Flood in Tongguan-Sanmenxia Watershed Based on HEC-HMS Hydrological Model
The optimal operation of reservoirs is the primary measure to ensure flood control safety and enhance the overall benefits of reser-voirs.Taking watershed between Tongguan and Sanmenxia Dam in Sanmenxia Reservoir area(Tong-San section watershed)as the research ar-ea without measurement and control,based on soil,land use,precipitation,runoff and other data,a HEC-HMS hydrological model was built to simulate the entire autumn flood process in the Tong-San section of the watershed in 2021,and analyze the flood superposition process and runoff changes of each tributary in the interval.The runoff coefficient method(including arithmetic mean method and Tyson polygon method)was utilized to compute the total runoff of the Tong-San section of the watershed,compared with measured values to validate the accuracy of HEC-HMS hydrological model simulation results.The results show that the HEC-HMS hydrological model has shown good applicability and reliability in the Tong-San section watershed,with a difference of only 2.33%between the simulated and measured total runoff values,and the simulation effect is significantly better than that of the runoff coefficient method.
万方数据
维普
