基于DPSR-改进TOPSIS模型的淮安市水资源承载力评价

对区域水资源承载力的综合评价是实现区域可持续发展的重要前提。针对目前评价指标体系和评价方法存在的一些不足,运用DPSR模型(驱动力-压力-状态-响应)提出了4类要素16个指标所组成的区域水资源承载力综合评价指标体系;运用熵权法对各指标进行客观赋值,减少了人为主观性对评价结果的影响;应用TOPSIS分析方法以解决评价体系参照标准的适用性问题,并引入灰色关联分析改进TOPSIS以克服其自身局限性,构建了基于DPSR-改进TOPSIS的水资源承载力综合评价模型。以淮安市为例进行研究,结果表明:淮安市水资源承载力在2015年前总体呈上升趋势,2015年之后明显下降;保持环保资金高投入,减少COD、氨氮等污染物排放量,提升水功能区水质达标率是提高区域水资源承载力的关键措施; DPSR-改进TOPSIS模型能为区域水资源承载力评价提供新的思路和方法支撑,具有一定的应用价值。

Evaluation of water resource carrying capacity in Huai'an City based on DPSR-improved TOPSIS model

In order to achieve the regional sustainable development, the carrying capacity of regional water resources needs to be evaluated objectively and comprehensively. In view of the deficiencies in the current evaluation index system and evaluation methods, a regional water resource carrying capacity evaluation index system consisting of 16 indexes divided into four categories was constructed using the DPSR (driving forces - pressure - state - response) model. The method of entropy weight was used to assign objective values to various indexes, which reduces the influence of human subjectivity on evaluation results. TOPSIS analysis method was applied to solve the applicability problem of the reference standard of the evaluation system, and grey relational analysis was introduced to improve TOPSIS to overcome its own limitations. Above all, a comprehensive evaluation model of water resource carrying capacity based on DPSR - improved TOPSIS was constructed. Taking Huai''an city as the research example, we can see that the water resource carrying capacity of Huai''an city enhanced overall before 2015, and then significantly declined. Maintaining high input of environmental protection funds, reducing the discharge of pollutants such as COD and ammonia nitrogen, and improving the water quality compliance rate in water functional areas are key measures to improve the carrying capacity of regional water resources. DPSR - improved TOPSIS model can provide new ideas and methods for regional water resource carrying capacity evaluation, which has certain application value.