基于FEFLOW的岸坡地下水三维渗流场模拟研究

Simulation of Three-Dimensional Seepage Field of the Bank Slope Groundwater Based on FEFLOW

三峡库区岸坡的涉水环境复杂,随着库水位的调度,岸坡内地下水渗流场不断地发生相应的变化。为深入研究涉水岸坡地下水渗流场的变化特征,在对巫山县江东咀地区涉水岸坡实地调查的基础上,基于三维数值模拟软件FEFLOW,通过构建涉水岸坡的渗流模型,对岸坡地下水三维渗流场在两个水文年、4种工况下的变化情况进行了三维数值模拟研究。结果表明:地下水水位随库水位的变化具有明显的"滞后效应",存在地下水渗流中的"漏斗"现象,且岸坡地下水水位的分布与地形和基岩面的位置密切相关。该研究成果可为类似涉水岸坡地下水渗流场的研究提供参考。

The wading environment of the bank slope of the Three Gorges reservoir area is complex.With the scheduling of the reservoir water level,the groundwater seepage field in the bank slope continuously produces corresponding changes.On basis of the field investigation of the bank slope in Jiangdongzui area of Wushan County and the three-dimensional numerical simulation software FEFLOW,this paper analyzes the changes of the three-dimensional seepage field of the bank slope groundwater in two hydrological years and four working conditions by constructing the seepage model of the bank slope.The results show that the groundwater water level has obvious "lag effect" with the variation of the reservoir water level,the phenomenon of "funnel" existes in the process of groundwater seepage,and the distribution of the groundwater water level of the bank slope is closely related to the topography and the position of bedrock surface.The research will provide reference for the study of similar seepage fields of bank slope groundwater.