滦河冲洪积扇上部河流与地下水相互作用模拟

Simulation on interaction between river and groundwater on Luanhe River Alluvial Fan

利用Feflow软件对滦河滦县段主要污染物硝酸盐氮的区域进行数值模拟,同时对监测井数据进行溶质拟合验证并模拟预测。研究表明,河道两侧地下水在山前上游附近污染不明显,河流在出山口后,沿河流两岸地下水出现了一定程度的污染,下游相对上游污染较严重,预测该地区未来5年中,由于黏土层的阻隔致使地下水污染物扩散逐渐减缓。

Numerical simulation was made to the section of Luanhe County,Luanhe River,where there are the major pollutants of nitrate nitrogen,by the software Feflow. And in the meantime,solvend fitting verification and simulation forecast to the data of monitoring well were made. The results show that the groundwater in both sides of the river is polluted unclearly around the upstream before the mountain; after the river runs out of the mountain,the groundwater along the river banks is polluted at a certain degree; the groundwater in downstream is polluted more seriously than the one in upstream. We can forecast that the clay barrier will make the diffusion of pollutants in the groundwater slowdown gradually in the coming 5 years.