A Water Scarcity Evaluation Model for Sustainability of Countries

摘要

In order to evaluate the ability of a region to provide fresh water to meet the need of its residents. We describe metrics in three aspects: the produce of water, the consumption of water and extra aspect. Moreover, each aspect is subdivided into several secondary indexes based on Food and Agriculture Organization of the United Notions. First, Analytic Hierarchy Process (AHP) Model is established to determine the weight of each indicator and evaluate the water scarcity. Then the Entropy model is built to overcome weakness of excess subjective factors in AHP. By using Product integration method to combine two models, we determine the final indicators weights and apply those weights into the DPSIR model to calculate CEI of 18 main countries and classify those into 4 levels. As far as CEI is concerned, the bigger, the better. Finally we take Kazakhstan as an example to analyze the reasons of the water scarcity and future fresh water situation in this country.