APPLICATION OF WATER QUANTITY AND QUALITY JOINT CONTROL MODEL IN QIANSHAN RIVER BASIN

Urban rivers are the carriers of the urban water ecological environment. Due to the increasing expansion of urban areas, the ecological impact of human activities on rivers is gradually increasing. A large number of urban rivers are facing problems, such as water pollution, ecological imbalance, reduced river flow capacity, and river sedimentation. This paper took the Qianshan River Basin in Zhuhai city as an example, and designed four sets of optimization scheduling plans to meet the need for basin optimization scheduling. By constructing a joint regulation model for water quantity and quality in the Qianshan River Basin, the scheduling effectiveness of the four optimization scheduling plans was analyzed. The results showed that the optimal scheduling effect is to build new water gates in the Qianshan River and Zhizhouchong River, which can isolate the Tanzhou water system from the Zhuhai water system. Tanzhou water system will become completely closed after the closure of the water gate and not be affected by salt tides. A unidirectional flow pattern will be formed in the Zhuhai water system, with inflow by Guangchang and Hongwan water gates, and drainage by Shijiaozui water gate on the Qianshan River.