Abstract:

Chinese research on the rainstorm induced landslide and debris flow forecast have promoted the digital landslide technology to be applied for landslide, debris flow motoring and early warning. There are three basic principles of modeling for rainstorm induced landslide, debris flow monitoring and early warning based on digital landslide technology. The primary is the modeling must be abided by the geology principles of landslide and debris flow. Moreover, the actual situation of the study area must be taken into account during modeling. And finally, the model factors selected is limited by remote sensing methods. According to the three principles, the modeling progress divided into six steps: (1)establishing the conceptual model in view of physical relationship between geological environment and rainfall conditions of landslide and debris flow; (2)defining the essential geological environment factors and establishing the hazard evaluation expression; (3)finding some index to impress moderately the essential geological environmental factors; (4)determining the weight of indexes according to the study area, the disasters status and the environmental characteristics; (5)defining the critical value for rainfall; (6)building mathematical expression.

Key words: rainstorm, landslide, debris flow, digital landslide technology, early warning model