A Multistage Weight Assessment Model Based on AHP and Entropy Information

Ecosystem assessment is a very complex problem in the society. There are more factors to resolve the problem. To a regional sustainable development, the health of ecosystem is very important in a city. In this paper, multistage-weight (MSW)model is proposed which have two stages indexes. Because, at different stage or level, there are different information which should been taking into account. To the first stage indexes, the Analytic Hierarchy Process(AHP) is used to compute the weight of these factors. The entropy information is used to compute the weight of the second stage indexes. Through the experiment, the MSW model is more reasonable and has the information of two stages indexes than other methods which only use one stage indexes of aquatic ecosystem health.