Numerical Simulation Of Groundwater Flow In Shanshangliang Well Field Of Dalate County Inner Mongolia

As a part of Ordos Basin, Inner Mongolia energy base is rich in mineral resources such as coal, natural gas and oil, covering a vast area, and having great potential for exploitation which makes it an important energy industry base in China. In order to find new groundwater resource to provide the local economic development, hydrogeological investigation has been unfold in Sanshangliang Area, where well fields are planned to be set up.Within the research area of 1500km2 and particular research area of 540km2, it emphasizes aquifer Formation of Q3-4 and confined aquifer Formation of Q2, with the depth of 300m. There is a thick aquifuge between them contained Glauber’s salt mine, which has no connection with the aquifers. In this dissertation, the two-dimension groundwater numerical modeling is set up using Visual-Modflow. The model is then proved to be able to analyze groundwater budget, evaluate water resource and predict groundwater table by identifying hydrologic parameters, fitting flow field and hydrograph, as well as matching the calculated results to actual budget.It has been concluded that from May, 2007 to May, 2008, the groundwater recharge rate was 4306.73×104m3/a while the discharge rate was 4423.64×104m3/a. In the model of 30 years, the annual groundwater recharge rate was 4170.61×104m3/a while the annual discharge rate was 4093.92×104m3/a.The trendency of groundwater table has been predicted under the condition of 3×104m3/d and 2.8×104m3/d for 30 years in three designed programs separately. According to the results, under the optimum program the exploitable resources will be 1810.24×104m3/a, and the planned well pumping resources will be 1098.00×104m3/a(3×104m3/d).