| Xin’an spring is located in the southeast of Shanxi Province, the west side of tai hang mountain in the middle, the geographical coordinates for longitude112°25’～113°36’, latitude35°51’～37°25’and the area of it about10950square kilometers. Xin’an spring is the karst big spring in Shanxi Province, and the important coal, energy and chemical base in our province, Spring for many years the average flow rate after1010m/s, but Water resources is the development of this constraint. The increasingly prominent contradiction between supply and demand of water resources due to the development of industry and the expansion of cities, karst underground water levels fall, spring water flow decreasing, water pollution is serious. The research domain in the spring field set sampling points, water samples collected from local existing Wells. Collect the springs domain related maps and written materials, complete spatial data storage and management database by the GIS thematic layer and storage the attribute data into the library, and domain space database based springs, including Xin’an Spring domain, drainage, and administrative studies and related data layer properties such as area layer. In the establishing the space database, on the basis of domain of spring water quality in the following sections:(1)With the space analysis function of the ArcGIS, the result of the valuable data was analyzed by the method of Meiluo index method and inverse distance weighting interpolation. a spatial distribution diagram on the monomial, comprehensive evaluation of Water quality and contour map of pollution indicators was drawn.Finally, comprehensive evaluation on the water quality from time and space.(2)In order to make evaluation results more clear, using GIS generates the sampling point pollution index of the histogram. In addition to the3d display technology combined with GIS, in based on the results of the sample point pollution index of the three dimensional figure, make evaluation result more clear.(3)Through the above evaluation results, select the groundwater quality classification standard for the evaluation of water quality, domain available spring water quality comprehensive pollution index meet the water quality standard, and has achieved good level.(4)This paper also studied the temporal GIS, classified the space-time data and dynamic display of model, dynamic display module based on GIS is developed, combined the GIS secondary development technology, using dynamic display model of the mixed dynamic change model, combined the GIS with dynamic display model, Changes to the concentration of the pollutants using dynamic analysis module, make the results more intuitive and image. Based on the above results, can intuitive see the degree of a region affected by some kind of pollutants, provides decision makers with intuitive and reliable basis, domain to springs of water quality protection to make more effective measures, finally put forward several proposals to the domain of water resources protection of spring.Finally aiming at the shortcomings of the thesis research exists, put forward the Suggestions for further research. |
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