基于熵权多元联系数的大沽河流域地表水环境健康评价

Health assessment of surface water environment in Dagu River basin based on entropy weight and multivariate connection number

为合理开发利用和保护大沽河流域水资源,构建了流域地表水环境健康评价指标体系和分级标准。基于集对分析理论,考虑各评价指标等级标准边界的不确定性,建立了熵权多元联系数耦合计算模型。将该方法应用于大沽河流域,得到流域地表水环境健康评价指标联系数计算结果。结果表明:2015年大沽河流域Ⅰ区(莱西市)、Ⅱ区(平度市)、Ⅲ区(胶州市、黄岛区)、Ⅳ区(即墨市、城阳区)以及Ⅵ区(莱阳市、招远市、莱州市)的地表水环境处于"健康"状态,Ⅴ区(高密市)以及整个流域处于"亚健康"状态。青岛市大沽河综合治理工程的实施使得流域地表水环境得到较大地提高,为进一步提高整个流域的地表水环境健康水平,应针对流域开展水环境治理工作。

The health assessment index system and grading standards for surface water environment were put forward for rational exploitation and protection of water resources in Dagu River basin. A model coupling entropy weight and multivariate connection number was established based on the set pair analysis theory with consideration to the uncertainty of the boundary of grade standards for each index. The method was applied to Dagu River basin to obtain the connection numbers of the health assessment index of surface water environment. The results showed that the surface water environment of Regions Ⅰ（Laixi）, Ⅱ（Pingdu）, Ⅲ（Jiaozhou and Huangdao）, Ⅳ（Jimo and Chengyang）, and Ⅵ（Laiyang, Zhaoyuan, and Laizhou） in 2015 were all healthy, but Region Ⅴ（Gaomi） and the whole basin were sub-healthy. The surface water environment of Dagu River basin has been greatly improved by the implementation of the comprehensive management program in Qingdao. The water environment treatment of the whole basin should be carried out in order to further improve the health of the surface water environment in Dagu River basin.