缺水城市大型景观内湖水质水量联合优化控制模型

Model for Combined Control of Water Quality and Quantity of Largescale Landscape Lake in Water-shortage City

针对缺水城市大型景观内湖补水水源短缺和水质维护难度大的问题,根据其景观娱乐、生态环境和雨洪调蓄功能对水质水量的要求,建立了基于水质水量联合优化控制的缺水城市大型景观内湖调度模型。模型充分考虑了多水源补水、水体循环净化设施和水体自净对内湖水质水量调度的影响,并以华北地区某市生态型新区大型景观内湖为研究对象,对模型进行实例应用研究。结果表明,通过对内湖蓄水量、雨水补水量、再生水补水量和循环净化水量4个模型决策变量的多目标优化,在满足了内湖水质要求的同时,提高了雨水利用率,降低了再生水补水量和循环净化设施水量。实例研究验证了模型的可行性和有效性。

To address the water shortage and difficult maintenance of water quality of large-scale landscape lake in water-shortage city, a lake water water quality and quantity was developed according scheduling model based on the combined control of to the requirements of the landscape entertainment, ecological environment and stormwater detention for the water quality and quantity. The model could de- scribe the combined effect of multiple water supply resources, sewage treatment facilities and self-purifi- cation of water on water quality and quantity of urban landscape lake. The application of the model to the large-scale landscape lake in a city of North China was investigated. The results indicated that through optimizing four multi-objective model decision variables, such as water storage capacity, rainwater com- plement volume, reclaimed water complement volume and circulating purification water volume, the water quality requirements were met, meanwhile the rainwater utilization rate was improved, and the reclaimed water complement volume and circulating purification water volume were reduced. The case study verified the feasibility and validity of the model.