层次分析-熵值定权法在城市水环境承载力评价中的应用

从广义水环境承载力定义出发，建立水环境承载力评价指标体系;采用层次分析－熵值定权法和向量模法对武汉市水环境承载力进行评价，该定权方法采用层次分析法确定权重，同时又引入熵值法对权重进行修正，在一定程度上减少了主观影响。该方法使评价指标的赋权达到主观与客观统一，对水环境承载力的量化更加准确与合理。该方法构造简单，便于实现计算机编程，所以应用较为简单、方便。以武汉市为例，综合考虑资源环境以及社会经济发展，建立了一套指标体系，利用向量模法对指标进行量化，结果表明武汉市2006~2010年水环境承载力逐年增大，由0129 3增长到02411，表明近些年武汉市水资源、环境与社会经济的发展协调性较好。从3个准则层中可以看出，资源与环境对武汉市水环境承载力的影响较大；社会子系统承载力评价值逐年上升，且上升趋势较快；随着经济的加速发展，经济子系统承载力评价值呈逐年下降态势

APPLICATION OF THE AHP AND ENTROPY WEIGHT METHOD IN EVALUATION ON CITY WATER ENVIRONMENTAL CARRYING CAPACITY

A set of index system was established based on the concept of generalized water environment carrying capacity. Analytical Hierarchy Process (AHP), the entropy weight method and Vector norm methods were adopted to evaluate the water environmental carrying capacity of Wuhan City. The weighting method used AHP to determine the index weights, and introduced the entropy method to modify the index weights of the evaluation, which reduced the subjective influence to a certain degree. This method combined subjective and objective evaluation of index weights and quantified water environment carrying capacity more accurately and rationally. The application of this method was relatively simple and convenient, because the structure of this method was simple and this method was easy to realize in computer programming. Taking Wuhan as an example, a set of index system was established and the indices were quantified by a comprehensive consideration of the factors of resources and environment as well as social and economic development. The results showed that the water environmental carrying capacity of Wuhan city increased during 2006-2010. The evaluation value of water environmental carrying capacity in Wuhan city increased from 0129 3 to 0241 1, showing the coordinated development of Wuhan City in water resources, environment and social economy in recent years. From the three criterion layer, we can see that resources and environment influenced on the carrying capacity of water environment in Wuhan City was bigger than social and economic subsystem. The evaluation value of social subsystem carrying capacity increased year by year and the rising trend was becoming more and more quickly. With the acceleration of economic development, the evaluation value of economic subsystem carrying capacity showed a declining trend