Numerical simulation of the unsaturated seepage field in the Dayantang landslide under the condition of fog rain

The fog rain has an effect on the seepage field of landslides.The effect involves a series of complex problems,such as intensity decision of the fog rain,surface flow and saturated-unsaturated seepage analysis of the landslides,etc.The fog rain’s intensity of the Dayantang landslide,which is located at the Shuibuya project,is obtained with the fuzzy comprehensive evaluation method.The soil-water characteristic curve is determined with tests,and the variable regulations of the seepage field in the landslide is gained with sloping surface run off-unsaturated seepage coupled numerical method.The results provide a seepage field condition used to forecast the stability of the Dayangtang landslide.The research methods offer a new way for simulating unsaturated seepage field of the landslide under the condition of fog rain or rainfall.