Numerical Simulation Research On Influence Of Channel Leakage In Fenhe River Upstearm On Karst Groundwater In Jinci Spring Catchment

The carbonate rocks are widely distributed in Shanxi province,accounting for one fifth of the province's area,the thickness of the sediment can reach more than 1000 meters,and there have abundant water resources reserves.Jinci Spring catchment is one of the 19 karst spring in Shanxi province,it is an important source of industrial,agricultural and domestic water in Taiyuan.It also has considerable resource value and ornamental value.Over the years,As a result of a large number of unplanned exploitation and coal mining drainage of the karst groundwater,Jinci Spring was set off in the middle of the 1990 s.Jinci Spring is a millennium ancient spring,we should take measures to protect the rational development and utilization of karst groundwater resources,make Jinci Spring complex flow as soon as possible.Therefore,it is important for protection the karst groundwater in spring catchment to study on the complex flow scheme of Jinci Spring.At present,there are many researches on Jinci Spring catchment in this region,the influence degree of influence on the groundwater level mostly Jinci Spring area factors and various factors on groundwater to do a full study,Thegroundwater level dropped mainly by the decrease of precipitation,the human over exploitation and mining mining drainage;However,about the spring area of supply,especially the effect of leakage on upper reaches of the Fenhe River.Therefore,we study on the influence of the leakage of upper reaches on Fenhe River to the karst ground water in Jinci Spring area.The full text is divided into three parts:The first part,Analyzed the basic situation,geological conditions,hydrogeological conditions in Jinci Spring catchment and leakage section of Fenhe River;The second part,based on the runoff data of the hydrological station in the upper reaches of Fenhe River,calculate the leakage amount in the upper reaches of Fenhe River by using the law between upstream water inflow and the leakage coefficient;The third part,based on the Visual MODFLOW,the groundwater flow model is established,and the influence of the amount of leakage in the Fenhe River is discussed.The results show that the increase of leakage play an active role to the Karst groundwater level rises,and the bigger leakage,the faster the water level rises up.therefor,the method of increase the supply can be applied to the complex flow of Jinci Spring project,this study has important significance of complex flow of Jinci Spring and the protection of Karst groundwater in Jinci Spring area.