Infiltration of atomized rain by flood releasing is an important factor to the stability of slope by plunge pool for high dam. In order to analyze the effect of atomized rain infiltration in Wudongde hydropower station

the two-dimensional unsaturated and unsteady seepage field is modeled for a typical profile of plunge pool slope

and is simulated with the FEM. The range of the saturated zone and the pressure head of the groundwater in the slope during the infiltration is analyzed under different slope protection conditions. It is shown that for the slope formation with high permeable layer overlying relatively low permeable layer

the pressure head in the resistivity water layer will raise gradually with the increase of infiltration recharge. Application of impermeable material to the slope surface as protection treament can largely decrease the infiltration of atomized rain into the slope

thus the influence of atomized rain on the seepage field of slope is significantly reduced.