基于熵权可拓决策模型的重庆三峡库区水土资源承载力评价

针对目前水土资源承载力评价中存在的信息屏蔽和主观性问题,以重庆三峡库区为例,在构建区域水土资源承载力评价指标体系的基础上,结合可拓学和熵权理论,对其水土资源承载力进行定量评价.结果表明:重庆三峡库区水土资源承载力超载区及向超载转化区包括渝中区、大渡口区等6个区县,占库区总区县个数的27.27％；满载区及向满载转化区包括北碚区、渝北区和巴南区3个区县,占库区总区县个数的13.64％；承载平衡区及向承载平衡转化区包括万州区、涪陵区等7个区县,占库区总区县个数的31.82％；可盈余承载及向可盈余承载转化区包括巫山县、巫溪县等6个区县,占库区总区县个数的27.27％.单指标评价结果表明,重庆三峡库区水土资源承载力主要影响因子是人均水资源量、废水排放率、人均耕地面积等.研究结果对于促进重庆三峡库区水土资源开发利用,并为类似地区的水土资源承载力评价提供了一种新方法.

Evaluation of soil-water resources carrying capacity based on entropy weight extension decision model in the Three Gorges Reservoir Region of Chongqing

Focusing on the problems of method, information shield and subjectivity of the evaluation of soil-water resources carrying capacity, this paper evaluated soil-water resources carrying capacity of the Three Gorges Reservoir Region of Chongqing with the theory of entropy weight and extension decision model. The entropy weight extension decision model includes building system of assessing factors, setting up field of the factors for classifying soil-water resources carrying capacity, constructing entropy weight extension decision model, etc. The results showed that six districts in the southwest Chongqing were overloading or in a overloading trend, 3 districts were full-load or in a full-load trend, 7 districts were balancing-load or in a balancing-load trend, and 6 districts were coordinating-load or in a coordinating-load trend. The study results illustrated that the influencing factors of soil-water resources carrying capacity included the amount of water resource per capita, the rate of waste water discharge, cultivated land per capita, etc. The study is helpful in promoting the exploitation and utilization of regional soil-water resources in the Three Gorges Reservoir Region of Chongqing, and provides a new soil-water resource carrying capacity evaluation method that can be used in other areas similar to Chongqing.