The evaluation of water's sustainable development

Abstract

In recent decades, the of the economy is very fast. However the environment is damaged deeply. More and more people put forward the definition of sustained development to solve the problem, which is called sustainability. Because the availability of water is a matter of life and death. We fo- cus on the sustainability of water resource. In order to measure the level of sustainability of a country's water resource. We establish the Supply-and-Demand-Matching Model to measure i.e. define the indexes of Supply Ability (SA), Demand Level (DL) and Matching Degree (MD), which objectively reflect the water ability. The first two indexes (SA and DL) are determined by indicators (17 in total, such as National Rainfall and Agriculture Use ) of two grades, and the third index (MD) is decided by SA and DL. We use two methods in the model, including Principal Component Analytic (PCA) and Analytic Hierarchy Process (AHP).PCA is applied to reduce dimensions of indicators in the second grade, while AHP is employed to give the weights of indicators in the first grade. Finally, 10 typical countries are selected to evaluate by SA, DL and MD. The re- sults show that our model is reasonable. KEYWORD: sustainability; Supply-and-Demand-Matching Model; Analytic Hierarchy Process (AHP); Prin- cipal Component Analytic (PCA)