| In rencent years, with sharp increase of groundwater demands, people begin to pay more attention to water environment protection, the numerical simulation of groundwater flow and transport of pollutants already have become an important research field in hydrogeology .The huanglong industrial park is located in western Gongzhuling city. In order to ensure that there is enough amount of water provided to the industrial production, it is necessary to evaluate and analyze the present situation of the groundwater. Therefore, the study on the groundwater level and the water quality ,and conceiving the rational exploitation plan in this area is meaningful for the ecology construction and economic development of the region.Firstly, this thesis introduces the study status in quo domestic and abroad of groundwater numerical simulation and the common solving method of groundwater numerical simulation model and the simulation software. Two solving methods which are the finite difference method and the finite element method are introduced in detail, three popular professional softwares which are FEFLOW,Visual MODFLOW and GMS are introduced. After comparative analysis, FEFLOW which based on the finite element method is used for this study.Based on collection and analysis plenty of material about geology and hydrogeology in GongZhuling area, this paper systemically represent the lithology of main stratum, existing condition, distribution regularities, circulation condition and the dynamic character of groundwater in study area. Then, this paper ascertains the scope of simulation region and the selective zone of calculation. After generalize the aquifer hydraulic characteristic, vertical boundary and lateral boundary, the groundwater mathematical model has been founded on the basis of the hydrogeology conceptual model. The dry season in May 30th 1985 is selected as the initial time of recognition period of model, the flood season in August 30th is selected as the end time. Because the simulation effect of identification and inspection is good, groundwater flow nets in the study area in next twenty years is predicted using the founded model. Prediction is made under the conditions of that the phreatic water yield is 5000 m3/d and the confined water yield is 15800 m3/d. From the change tendency of many years, constant decline in the groundwater table didn't appeared. It shows that the yield quantity is almost equal to the recharge quantity under the condition of that groundwater is exploited in this yield quantity,yield quantity is almost balanced to the recharged quantity. There is recharge guarantee for exploiting groundwater with the designed project.Once groundwater was polluted due to the reasonless developmemt and utilization, it will infect the entirenment seriously, and will badly endanger the health and activity of pepole. So the compositive evaluation of groundwater quality is an important work to the development and utilization of groundwater resources.This text applicates the improved Nemerow index method to the evaluation of water quality in study area. The results show that phreatic water quality is bad and the confined water quality is good. In comparison with practical situation, it is revealed that the evaluation results is rather accurate. Based on the estimating of water quantity model and water quality model,this paper establishes the groundwater solute transport simulation model. The analytic solution about model has been gotten by using Laplace transform. Finally,this paper selects DO,BOD5, CODcr, total phosphorus,ammonia nitrogen and adopts average weighted method to evaluate the phreatic water quality of expoitation area. Oweing to the important impacts of r Dong Liao river on phreatic water quality , we should strengthen the management .
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