Gis-based Water Resource Assessment And System Development

Water is the material basis of human being's survival, economic and social development. It is important natural resource that can't be replaced. With the quick development of economic and social, the demands for water resources has become higher and higher, but the freshwater utilized is limited. The shortage of water resources not only restricts the development in economic society but also brings about the continual deterioration of water environment. Knowing the water resources and it's distributing of space-time well is the precondition and foundation of exploitation, utilization, planning and management to water resources.Basing on a lot of references, this paper introduces the existing research results of the domestic and overseas about water resources evaluation, and the application of GIS on water resources especially on water resources evaluation. On the basis of analyzing the structure and characteristic of water resources, the model of water resources evaluation is established and applied to Tarim river watershed which is selected as the research object. Then the study of "the evaluation methods and its application of watershed water resources based on GIS"is processed.Studying the basic theory and methods is one of the major tasks of the paper. The contents, basic theory and methods of water resources evaluation are presented detailedly in this paper, and the evaluation model and calculation methods of the quantity, quality, exploitation utilization and comprehensive evaluation of water resources are discussed. In this paper, the spatial interpolation calculation model of precipitation, the evaluation model of water resources development level, the simulation model of temporal and spatial change of water resources and the coordinating degree DD (T) model on water resources and economic society are established.The development of GIS-based water resources evaluation system is also one of the major contents. The goal, the principle, the structure, the major function, the design and the realization of water resources evaluation system are discussed detailedly in this paper.Based on antecedent research and collecting a large number of data, Tarim river watershed is taken as the research object. Through water resources evaluation to Tarim river watershed and by contrast with historical data, it indicates that the conclusion is reasonable, credible and effective, and the significant reference for allocating water resources rationally is provided.