Improvement research of flood routing model in Aksu River basin

Abstract To optimize the existing flood control plan of Aksu River basin and strengthen the flood control management during the flood season, the flood routing of Aksu River is studied based on the improved Muskingum method. Firstly, to make up for the shortcomings of the traditional Muskingum method in flood routing of double tributaries, the parameters of single tributary are further improved. Then, the improved Muskingum method is used to simulate and validate the flood process of Shaliguilanke, Xiehela and Xidaqiao hydrometric stations in Aksu River from 1999 to 2016. The results show that: (a) In the main stream of Aksu River, the flood of Xidaqiao Hydrometric Station is mainly caused by the water coming from Xiehela Hydrometric Station, while the flood caused by the water coming from Shaliguilanke Hydrometric Station and two stations (Shaliguilanke Hydrometric Station and Xiehela Hydrometric Station) is less. (b) We classified the main streams of the above three situations by flood peak level, and then carried out flood routing. The calculating parameters under the same flood peak level all show strong integrity, and the fitting degree between the simulated process and the observed process is relatively high. The parameters K and x inversely deduced under the condition of the inflow of Xiehela Station as the main source have more physical significance.