| The study area is located northwest of Alashan Left league of Bayan town 48 km of the purple clay lake basin, It`s named New well water supply point ,that supply water resource for Bayan town. In the study area is a typical temperate arid, lack of rain and more of evaporation. In this thesis, based on detailed analysis of research area geology and hydrogeology conditions, and on the basis of hydrogeology parameters, aquifers informations, I created a 3D geological model and establish the hydrogeological generalized model. This paper based on the finite element method and finite difference method FEFLOW and MODFLOW of groundwater system of numerical simulation are analyzed, and analysised similarities and differences between the model in underground flow problems. And predict the utilization of groundwater resources, and put forward available groundwater program for the study area over the next 20 years at last.Research area in the vertical division for unconfined aquifer, aquiclude,and the confined aquifer three levels. The unconfined aquifer and confined aquifer as the main mining layer. Based on the model of two methods identifying model , identifying hydrogeology parameters and flow fitting. These two methods get results similarly. Finally, using the mathematical model is verified through the recognition and predicts future 20 years of underground water drop deep and the change of study area, put forward the suggestion for groundwater exploitation and evaluation of resources.water resources of Numerical simulation regional is 35420m3/d, water resources of water supply point is 17980 m3/d. Reasonable exploitation of Numerical simulation regional is 2.16万m3/d,suggested reasonable exploitation of water supply point is 1.5-2.0万m3/d.
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