Abstract:

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