Abstract -- There are many sediments will transport from the slopeland area to the downslope area of watershed in Taiwan natural environment each year, especially this phenomenon increased rapidly such as landslide cause many sediment disasters after the Gi-Gi earthquake. Landslide analysis include: the disaster influence area designation, the residents evacuation route, beginning factors analysis, control works planning, land use management, disaster evaluation and predication, etc., but there are many influence factors will still cause decision the time landslide difficulty and it need detail research for predication landslide for protect human life in recently.
This project used the Da-Hu landslide at Maioli county, Da-Pu landslide at Chiayi county, Chiu-Fen-Er-Shan landslide at Nantou county as the experimental sites to investigation the local rainfall intensity, the magnitude of groundwater table raise and time of rising after rainfall, rising segment and falling segment, etc., to simulate this process with triangle groundwater table predication model. We hope this model can be used for the time of landslide predication and combine warning system equipment to avoid direct disaster impact.
According to the investigation data, the rainfall intensity and the magnitude of groundwater table raise relationship are closely, but the investigation data are so few and each rainfalls are continuously, thus we can not divide each rainfall influence, moreover the groundwater table change and slope stability predication. It still need continuous investigation and join another groundwater and geotechniqual tests for examine more clear mechanism and carry out the practical concept model.