The Study of Remote Sensing Information Extraction on Geological Disaster Risk Assessment Factors

The Three Gorges reservoir area is a geological disaster-prone area in China, the terrain and climate are both complicated in this region. Take Zigui which locates in The Three Gorges reservoir area as the experiment area, this paper uses the remote sensing imagery as the main data source in extracting factors which may cause the geological disaster. In this paper, we get a framework used for the evaluation of the risk of geological disaster. This paper analyzes the main factors which can be obtained through remote sensing, and in the end we get four parameters, vegetation coverage, soil moisture content, land cover/use and surface roughness. Principled to be simple, practical and scientific, we discuss the extraction method on each factor, and apply all of them in the geological disaster risk assessment model. This research has a positive promotion in the risk assessment of geological disaster in regions with complicated terrain and climate.