Numerical Simulation And Prediction Of Groundwater In The Proposed Water Source In Tongyu County

Nearly half a century,the development and utilization of groundwater level continues to improve,especially in the groundwater exploitation region,the groundwater funnel,serious water pollution and a series of due to the over exploitation of groundwater caused by environmental geological problems.With the development of socialist modernization,development and utilization of groundwater resources inthe scale is more and more big,in order to scientific management and reasonable exploitation and utilization of groundwater resources,and to reduce and avoid the environmental geological problems,to make rational evaluation of groundwater resources.Tongyu water source is located in the northern of Kaitong county.There are 8 water source wells in the groundwater resource.It exploits groundwater of the tertiary(Nt+Nd).There are two aquifer In the study areas,namely loose-rocks pore water of the Quaternary and clastic rocks fissure water of the tertiary.The Quaternary pore aquifer is divided into phreatic aquifer and pore confined water aquifer.The Neogene aquifer is divided into Taikang and Daan group cranny pore confined water aquifer.In this paper,a comprehensive analysis of the hydrogeological conditions,the town opened source terrain conditions and groundwater research degree,determine the objective evaluation of water supply aquifer for Neogene confined water,and the equilibrium calculation and evaluation of water supply to the aquifer of groundwater resources,the results show thatallowable withdrawal of the target aquifer is 1.396×104m3/d.Based on the balance evaluation,the conceptual model and corresponding mathematical model of the simulation area are established.The use of GMS software for mesh generation,parameter zoning and source sink term of simulation area,and the identification and verification of the model using the measured data of groundwater level.Finally,the use of model validation after the change of water level of groundwater development and utilization of different programs to simulate forecast.The results showed that 15 m decreased water level of confined water after 20 years,the water after the completion of operation,will be on the living area within the original villages with wells and irrigation wells influence.The groundwater flow numerical simulation model established in this paper can provide scientific basis for the dynamic management of groundwater level,water resources scientific management,sustainable development and protection,and evaluation of groundwater resources.