南水北调供水前后京杭运河梁济段沿岸地下水埋深变化预测研究

Prediction for Groundwater Depth Changes in Intake Area of South-to-North Water Transfer Project in Liangji Reach of Hangzhou Canal

运用地下水模型软件Visual Modflow建立了地下水数值模拟模型,并利用模型对梁济运河沿岸南水北调受水区进行了地下水数值模拟和趋势的预测。预测结果表明,在预测过程中降水及蒸发量未做改变,河流水位相应提高。在数值模型模拟期末,地下水埋深在京杭运河济宁段的西岸附近在7 m^8m左右,而在预测末期,地下水埋深变为1 m^2 m左右,变化幅度超过5 m,地下水埋深等值线相对密集,说明河流水位的抬升,对地下水位的影响不容忽视。

The simulation and prediction for groundwater are made by the model built with the software Visual Modflow and based on the numerical simulation and trend prediction for the groundwater in the intake area of South-to-North Water Transfer Project in Liangji Reach of Hangzhou Canal. The results show that during the prediction, the precipitation and evaporation would not be changed, and the river level would be raised relevantly. In the last phase of the simulation, the groundwater depth is about 7 - 8 m in the west bank of Jining Canal, and in the final phase of the prediction, the groundwater depth is about 1 - 2 m. When the change range of the groundwater depth is over 5 m, the isolines of the groundwater depth are relevantly concentrated, which could explain that the influence of river level raising on the ground- water level should not be neglected.