THE ANALYSIS OF GROUNDWATER SEEPAGE FIELD IN SHUPING LANDSLIDE IN THE THREE GORGES RESERVOIR

The distribution of groundwater has a great influence on the stability of the reservoir slope. Taking Shuping landslide for example, Visual Modflow software was adopted in numerical simulation calculation on seepage field under different conditions. The conclusions are as follows：the groundwater level changes with the reservoir water level fluctuations; the water level is less affected on the trailing edge of the landslide, while it's changed significantly on the middle and the front edge; in the process of reservoir water level falling, the relationship between the time and water level in the landslide shows the following characteristics：stable water level, falling down fast, slowly falling and stable water level. And the different falling speed only affects the water level change rate, while having not effect on the final water level; with the increase of reservoir water drop speed, the greater the landslide leading edge of the underground water level changes, the greater the hydraulic gradient becomes, and the hydraulic gradient becomes largest on the both side of the border of the landslide. And the paper also provides a reference for landslide groundwater seepage field changes and its stability analysis in Three Gorges Reservoir.