Research On Spatial Disparity Of Water Use Efficiency In China

In this thesis, we will disscuss China's water resources distribution, allocation and use status, then calculate water use efficiency of each province. But there are too many provinces, that will bring some shortcomings to our research; at the same time each province with its own characteristics, such as different economic level, different per capita water resources and different water resources exploitation ratio,so we use SPSS to clustering them. After that we do some analyse on the trends of regional water use efficiency change,calculate the regional disparity of water use efficiency,then analyze the decomposition of regional disparity. In order to understand the reason why water use efficiency change,we use Kaya identity and Log-Mean Divisia Index Method I (LMDI I) to decomposition water use efficiency ,and make sure each reason change water use efficiency how much. It is of great significance to improve water use efficiency, reduce regional disparity in the coming future.Through investigation, the following conclusions are obtained:(1) Water use efficiency whether national average or regional were significantly improved during 1997-2007, but there is still a big regional disparity ;(2) China's total spatial disparity, inter-regional disparity and within-region disparities are further increased during 1997-2007;(3) The changes in water use efficiency in China mainly lead by economic development, the change of resource endowments, the change of water resources exploitation ratio. And conomic development is the major factor lead to water use efficiency change.(4) China should focus on the economy development of the backward areas and narrowing the economic disparity, in order to shorten spatial disparityof water use efficiency in China, and to improve water use efficiency in China.