The Carrying Capacity Analysis Of Water Resources In Heihe Trunk Areas And Countermeasures Study Of Water-saving Society Construction In Zhangye

Water is a main controlling factor for economic development and eco-environmental protection in the Zhangye basin, middle reaches of Heihe River. As one of ancient agriculture areas, water resources development and use history more than 2000 years in Zhangye basin. In recent years, due to the unreasonable development and utilization of water resources, lead to a series of society and ecology environment questions in the area. Such as the conflicts about water utilization in the area more than before,the decline of groungwater levels and natural diversiform-leaved poplar forest and bush forest die away even to death, and so on.It is very dangerous for future water exploitation and limits the supply of potable water. Therefore,to utilize and protect valuable water resources effectively, it is necessary to research bearing capacity of water resources under artificial influence.Based on the principle component analysis method,the driving factors about bearing capacity of water resources in Ganzhou Linze and Gaotai were analyzed. According to the development and utilization about the present situation in Heihe River basin, the optimize distribution model of bearing capacity of water resources were established and forecast the bearing capacity of water resources in research areas.The research finding has shown as the following.1 The driving factors about bearing capacity of water resources in research areas were divided into both social and natural system. In the social system economy is important factor and water resource quantity is crucial factor in natural system.2 The optimize distribution model of bearing capacity of water resources were established and forecast the bearing capacity of water resources in research areas. The result shows that water resource quantity in research areas is incapable of social development and environmental protection requirement after optimize distribution.3 Based on the practice of water-saving society in Zhangye , proposes some measures for water-saving society. Water right distribution is most important way to resolve water shortage. To achieve water resources utilization effectively, water right distribution must combine with economic lever.