Three Dimensional Geological Modeling Of The Liujiang River Basin And Evaluation Of Groundwater Resources In The Core Area

The Liujiang River basin named the Liujiang River Village,belonging to Qinhuangdao city Shimen County town of Funing,located at the foot of the northern Mount Yan,with a total area of about 378km2.The Liujiang River basin is well developed.The era of complete,widely distributed,clearly retains the Archean,Proterozoic,Paleozoic,Mesozoic and Cenozoic geological evolution history,"a tiny area,five generations " is the basic geological field worthy of the name,and the famous education base.This paper relies on the Qinhuangdao Liujiang River basin 1:5 million hydrogeological investigation of water resources of the Liujiang River basin and the three-dimensional geological structure model of core area calculation and evaluation are studied,and I can provide a more intuitive three-dimensional visualization model for the the Liujiang River basin geological practice,provide more theoretical basis for the sustainable used and development of local groundwater resources.According to the field survey data,and the original data collected before,fully understand the stratigraphic structure of the Liujiang River basin and the main geological structure of the Liujiang River basin,the boundary conditions are determined,using GMS combined with drilling data and profile data,established three dimensional geological model of the Liujiang River basin.The 3D geological model of the Liujiang River basin is established by using GMS data and profile data.The model can show the overall structure of the the Liujiang River basin in a multi angle,all-round and hierarchical way and realize the 3D visualization.It can display the three-dimensional structure of single,multiple and mixed strata.It can be used to show the cross section of any vertical and horizontal kilometer grid,which can display the fence map of the north and south,East and west section,so as to show clearly the three-dimensional geological conditions of the Liujiang River Basin.In order to find out the hydrogeological conditions,the formation,occurrence and migration of groundwater,the distribution of water quality and water quantity,and the evolution of the strata,the paper provides a direct and visual geological model.For the the Liujiang River basin 1:5 million hydrogeological survey enriched the results.And provide a more detailed reference guide for the intuitive geological geological college to carry out the practice in the Liujiang River Basin.It also provides theoretical support for the evaluation of water resources and the study of the change of groundwater.According to the hydrogeological conditions and parameters obtained from hydrogeological investigation.The groundwater system in the Liujiang River basin is divided into three parts: the Zhucaoying area,the Shimenzhai area,the limestone burial area,the flower field division and the Tang River area.Then,the water resources of the Liujiang River basin are calculated and evaluated,and the total recharge resource of the groundwater system is about 1822.209×104m3/a,The total discharge was 1889.299×104m3/a.The equilibrium quantity of groundwater resources in the evaluation area is-67.091×104m3/a,it was negative equilibrium,The average annual variation of groundwater level is-0.45 m,Water level decreased year by year,Through the establishment of the three-dimensional geological model of the Liujiang River basin,the groundwater resources in the evaluation area is-69.581×104m3/a,The results agree well with the water balance equation,The accuracy is high,and the result is accurate,It can be used as the theoretical basis for the exploitation and utilization of groundwater resources in the core area of the Liujiang River basin.The exploitable resources of groundwater in the core evaluation area are 1374.247×104m3/a,Among them,the recoverable resources of karst groundwater in Shimen karst area are 707.719×104m3/a,accounting for 51.5%.