Application of Numerical Simulation on the Xiquan Lake Wetland Based on Surface Water and Groundwater Coupling Model

By building the coupling model for conjunctive use of surface water and groundwater of Xiquan Lake water source,the surface water concentration was discussed by using the QUAL2 K consequence.Based on the finite difference technique and MT3 D model of Visual MODFLOW,dynamic changes in ten years later on the groundwater environment of Xiquan Lake wetland in Shenbei Area,Shenyang province were analyzed. Water level simulation results show that reserved water source will form a funnel in 2020 and the contour of groundwater level will decline 2. 5 m,having a great decline compared with 2009. Not only meeting the benefits of water supply source,but also solving the water immersion problems caused by the reservoir surrounding impoundment. Water quality simulation results show that reservoir surrounding groundwater quality is good,and there is no impact on water source quality. However,the water quality in Liao River tributary is not optimistic,taking a serious threat to water source quality. To ensure thewater quality security of water source,it is imperative to treat the Xiquan Lake surface water pollution.