Study On Carrying Capacity Evaluation And Coupling Of Water And Land Resources In Xinjiang

Water is the source of life, land resource is the survival for humanbeings, water and soil resource is an important material basis for human survival andthe sustainable development of economy, society, ecology. Xinjiang is the waterscarcity area which occupies the areas of our country land1/6, in the background ofleap-forward development strategy, its soil and water resources carrying capacity andthe coupling and coordination between water and soil system become the importantpart to relieve the contradiction between water and soil resources and social economydevelopment, ecological security and increasingly prominent.The research regards the water and soil resources as a complete system.On theone hand, it evaluates the water and soil resources comprehensive carrying capacity indifferent states in Xinjiang which takes the water and soil resources systems and thedemographic, social, economic, ecological together as a composite system, on theother hand, it explores the extent of water and soil resources coordination coupledXinjiang according to the system coupling theory. Firstly,18indices are chosenthrough five aspects of driving forces, pressure, state, impact and response to build theDPSIR conceptual model. The weight of indices is determined by method ofmean-squared deviation weight decision. Comprehensive index method is used toevaluate the water and soil resources carrying capacity and result is classified into4levels. Secondly, it builds the coupling model of water and soil resources, the model isbuilt by determining modulus of water supply-demand among different land use types,the modulus of water supply-demand is calculated based on water demand ofagriculture, industry, living and total volume of water resources in14states inXinjiang. The coupling indices of14states are also classified into4levels too. At last,two results are overlay to divide Xinjiang into different types of areas.The result shows, North-Xinjiang’s water and soil carrying capacity is betterthan South-Xinjiang, Tacheng and Boertala Mongolian Autonomous Prefecture owethe highest evaluation value, however, Kashi and Hetian are the worst areas in Xinjiang for water and soil carrying capacity. At the meanwhile, it has the same trendof water and soil coupling in Xinjiang, besides, the cities’ water and soil couplingdegree are worse than others, Tacheng and Boertala Mongolian AutonomousPrefecture belong to the water and soil coupling advantage area, Karamay city andTurpan, Hami which in north slope economic belt of Tianshan mountain are theinferior area of water and soil coupling index. On the base of the evaluation result, itanalyzes the coupling index of different states in Xinjiang of every same level throughoverlying the two results to divide Xinjiang into8types, according to characteristicsof each type, the research proposes the direction and suggestions of optimizingresource utilization of water and soil.