基于多目标模糊优化模型的兰州市水资源优化配置研究

Optimal Allocation of Lanzhou Water Resource Based on a Multi-objective Fuzzy Optimization Model

构建可持续发展视角下的兰州市水资源优化配置模型。以净效益系数、水利用系数和供水成本为指标,运用熵值法修正由层次法获得的各项指标的权重,并采用多目标模糊线性优化模型确定各用水部门的综合效益系数,代入线性规划法求解规划年2020年在不同用水保证率(多年平均、50%、75%、90%)下各用水部门分配水量。分配结果(多年平均)与预测结果相比工业用水量减少了1.363 5亿m^3,农业用水量和生态用水量分别增加了1.126 0和0.237 5亿m^3,该分配结果有利于实现兰州区域经济的可持续发展与水生态的协调发展。

An optimal allocation model for Lanzhou with sustainable development is established.Three indexes,including net benefit coefficient,water use coefficient and water supply cost are considered,a multi-objective fuzzy linear optimization model is used to calculate comprehensive benefit coefficient of each department,and the optimal allocation volume of water is solved through linear analysis for different water-supply frequency（50%,75%,90%）in planning year of 2020.Comparing the result of optimal allocation（average of many years）with the prediction value,it is found that the industrial water has reduced by 136.35 million m3;the agricultural water and ecological water have respectively increased by 112.60 million m3 and 23.75 million m3.The allocation result is benefit to the sustainable development of economic society and the water ecological coordinated development.