基于“五水共治”规划的水资源承载力评估

为了评价"五水共治"综合规划实施后水资源承载力变化情况,以临海市为研究对象,选取了17项评价指标构建水资源承载力评价指标体系,采用主成分分析法对评价指标进行降维处理,建立水资源承载力变化驱动因子的多元线性回归模型,提取水资源自然支持力、社会生活水平和经济发展水平3个子系统的主成分,并用熵值法对子系统赋权,计算水资源承载力综合得分,并进行分析评价。结果表明:"五水共治"综合规划实施后,临海市水资源承载力有明显提高,治污、开源、节流是提升水资源承载力的主要因素。

Evaluation of water resources carrying capacity based on plan of co-governance on five water categories

In order to evaluate the changes of water resources carrying capacity after co-governance on five water categories was put into effect, taking Linhai City as an example, 17 evaluation indices were selected to construct the evaluation index system of water resources carrying capacity, the method of principal component analysis was used to reduce the dimension of the evaluation index, and a multivariate linear regression model for corresponding driving factors of water resources carrying capacity was set up. Three principal components of water resources natural support capacity, level of social life, and economic development level were extracted, and the entropy value method was used to determine the weight of subsystem, calculate and analyze the composite scores of water resources carrying capacity. The results show that the water resources carrying capacity in Linhai City has an obviously increasing trend after the plan of co-governance on five water categories was carried out, and anti-polluting, seeking for new water supply, saving water consumption are the main factors of improving the water resources carrying capacity.