Optimization And Research On Interception Engineering Of Groundwater In The Northern Semi-arid Areas

Interception engineering of groundwater in Chongli Thaiwoo four season cultural tourist resort is located in the northeast of Sitaizui town,Chongli county,Zhangjiakou city,He Bei province.The geomorphology of engineering areas,where the gully are fully developed,belong to valley landform in the typical northern arid region.The gully helps atmospheric precipitation runoff and drainage.It is meaningful that utilization of groundwater from interception engineering can solve the shortage of landscape water.This thesis builds up a shallow groundwater movement model through collecting and reorganizing the data of natural geography,hydrometeorology,topography,stratum and hydrogeology.The top boundary of the model is the earth's surface and meanwhile,the bottom boundary is the quaternary strata.Other boundaries belong to secondary boundary.This model is nonhomogeneous,isotropic,steady flow underground unconfined aquifer.The numerical model based on the finite difference method through Visual MODFLOW software receives predictable response during the process of recognizing,verifying and fitting.The groundwater model simulate two scenarios:the natural state and interception engineering at downstream.Based on the model simulation and calculation in Visual MODEFLOW,the outputs figure out the distribution of groundwater flow and water discharge in natural state,interception at upstream and downstream respectively.The results show that water discharge is 1248.622 cubic meters per day in natural state and1240.752 m~3/d in interception engineering at downstream.With the traditional calculation method to calculate the average daily water inflow of close to 1216.5 m~3/d results,so think of model established in this paper,underground diving basic realize the simulation of groundwater flow field is obtained,and can be used to predict.In this paper,the established model can reflect Chongli Thaiwoo four season cultural tourist resort in the underground engineering area movement and state of flow field.The simulation results provide important reference for the layout of interception engineering and meaningful prediction for groundwater distribution analysis.