From the area to the point-study on the key technology of 3D geological hazard modeling in Three Gorges Reservoir area

Abstract

Taking hundreds of pieces of hazardous geological maps (1: 10 000) of Three Gorges reservoir area (3GR) as background, we establish regional three-dimensional (3D) geo-hazard model using DEM (digital elevation model) superposed surface images and geo-hazards elements. Based on landslides and other geo-hazard survey data, using improved B-REP (boundary representation) entity data structure (two-body 3D data structure), we set up 3D solid models for each hazardous bodies in each hazardous geological maps. Then we integrate the two types of 3D models with different scales from area to point, which are the regional geo-hazard 3D model and the solid models of each disaster body, in order to provide a visual processing and analysis platform for danger partition, stability evaluation, disaster prevention and control, early warning and command.

Keywords

investigation database / regional 3D geological model / three-dimensional solid model of disaster body / disaster prevention and control / early warning command

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