(1.河海大学水文水资源学院,江苏 南京 210098;2.皖江工学院水利工程学院,安徽 马鞍山 243031;3.江苏省洪泽湖水利工程管理处,江苏 淮安 223100)
(1.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China;2.School of Hydraulic Engineering, Wanjiang University of Technology, Maanshan 243031, China;3.Jiangsu Hongze Lake Water Conservancy Project Management Office, Huaian 223100, China)
In order to study the discharge capacity of Hongze Lake in the middle and lower reaches of Huaihe River during medium and small floods, a one-dimensional and two-dimensional coupling hydrodynamic model was established for the Sanhezha section from Bengbu of Huaihe River to the outlet of Hongze Lake. The impact of key river reaches cutting beach on discharge capacity under middle and low water levels of Hongze Lake and the flood discharge process in watershed before and after cutting beach were simulated and analyzed. The results show that under the five-year flood process, the water level of Bengbu, Linhuaiguan, Xiangmiao, Fushan and Hongshantou hydrologic stations in the main stream of Huaihe River decreased by 0.02.m, 0.07.m, 0.21.m, 0.55.m and 0.70.m, respectively after cutting beach during the flood peak period, and the floodplain time decreased by 1 day, 4 days, 9 days, 9 days and 17 days, respectively. The maximum water level of Sanhezha Station in Hongze Lake was 13.33.m, which was 0.07.m higher than that before cutting beach. The discharge volume corresponding to the lake was 8.300.m3/s, which was 800.m3/s higher than that before cutting beach and the discharge capacity increased by 11%.
薛联青,成诚,汪露,等.洪泽湖中低水位下泄流能力数值模拟[J].水资源保护,2022,38(5):32-38.(XUE Lianqing, CHENG Cheng, WANG Lu, et al. Numerical simulation of discharge capacity under middle and low water levels of Hongze Lake[J]. Water Resources Protection,2022,38(5):32-38.(in Chinese))复制