ABSTRACT
Landslide model experiments according to the rainfall intensity are performed to investigate the spreading range of debris by the landslides. To do this, a model flume and a rainfall simulator are designed and manufactured firstly, and monitoring instruments are installed to measure a pore water pressure in a slope and a deformation of the slope surface during experiments. A series of the model experiments according to the rainfall intensity are performed to find out the occurrence characteristics of landslides and predict the spreading range of debris. The model test equipment is designed and manufactured to measure a spreading range of the run out distance occurred by debris flows. The spreading area of debris is rapidly increased with independent of rainfall intensity at the early period of rainfall. But, the difference of spreading areas according to the rainfall intensity is gradually increased after the passage of a certain time, and the spreading area is increased with increasing the rainfall intensity.
