The Inner Mongolia Autonomous Region Water Resources Carrying Capacity Evaluation Research

Though 70% of the earth’s surface is covered by water, it is limited of the water on the earth for people directly use, because the fresh water is only 2.53% and two-thirds of them are kept in the Antarctic ice hard to be used. The total water of our country is 2.8125 trillion m3, ranked fourth in the world; but due to the large population, the water resource per capita is 2240 m3, only is 25% of the world’s average level which revealed the scarcity of China’s water resource. In addition, our country is a developing country, promoting social and economic development is the primary task of our country to improve the life level of rural and urban citizen. The development of economy is dependent on various conditions, the water resources is one of the indispensable conditions. The rapid development of economy in some regions of China is based on the exhaustion of water resources, causing rivers pollution and the underground water decrease. Currently, China’s fresh water shortage, pollution and waste can also affect the development of economy; water shortage has been the bottleneck of restricting China’s development.The total fresh water amount is 554.88 × 108 m3 in the Inner Mongolia autonomous region, the surface water is 406.40 × 108 m3, underground fresh water is 236.4 × 108 m3. The population is 24.8985 million people; the water resource per capita id 2171.6 m3, its amount of water in China is ranked second from bottom. Thus, its water resource is very scarce, and will be a serious influence on the social development, so the correct evaluation of its water resources carrying capacity, serious planning regional freshwater resource will have a very important role.The article discusses the water resources carrying capacity of the Inner Mongolia autonomous region, and calculates the content of the water resources carrying capacity on 12 union city in Inner Mongolia autonomous region. The first chapter is the theoretical basis for understanding its definition, connotation, and lays solid underground for the next step; The second chapter is about the general water situation of the Inner Mongolia autonomous region for understanding the characteristics of the water resource of Inner Mongolia autonomous region; the third chapter is about its evaluation method and results; The fouth chapter is the solution for the sustainable development of water resources in Inner Mongolia and the last part is conclusion.In this paper, the Topsis method and principal component analysis are selected. the 15 calculation index such as quantity of per unit area, water resources, population and so on, are selected to reasonable calculate the size of the bearing capacity of water resources in Inner Mongolia. The data is selected from statistical yearbook, water resources reports and the related data of Inner Mongolia autonomous region in 2012. The results showed that, the water resources carrying capacity is generally at a low level, water resource is short. The good region in Inner Mongolia autonomous region is Xilingol league area, Hinggan league and Hulun buir city, the general is Chifeng, Tongliao and Alashan league area. The water resources are weak in Wuhai and Baotou cities and are poor in Hohhot, Ordos city, Wulanchabu city and Bayinnaoer city, etc.Finally, the problems were found existing in the water resources through the evaluation the water resources carrying capacity of Inner Mongolia autonomous region. It is concluded that there are natural and social factors which influence the size of the mining and water use, etc., and the methods were suggested for sustainable development of the total fresh water for people to use in Inner Mongolia autonomous region through these factors.