From the Area to the Point-Study on the Key Technology of 3D Geological Hazard Modeling in Three Gorges Reservoir Area

• Published in: Journal of earth science (Wuhan, China) Vol. 23; no. 2; pp. 199 - 206
• Main Author: 刘军旗 黄学斌 吴冲龙 程温鸣 项伟 夏鹤
• Format: Journal Article
• Language: English
• Published: China University of Geosciences China University of Geosciences 01.04.2012; Springer Nature B.V
• Subjects: Biogeosciences; Canyons; Data structures; Disasters; Earth and Environmental Science; Earth science; Earth Sciences; Emergency preparedness; Geochemistry; Geological hazards; Geological mapping; Geological surveys; Geology; Geophysics; Geotechnical Engineering & Applied Earth Sciences; Hazardous; Landslides; Reservoirs; Simulation; Technology; Three dimensional models; 三峡库区; 三维实体模型; 三维数据结构; 区域地质灾害; 危险性分区; 建模; 技术; 数字高程模型; regional 3D geological model; three-dimensional solid model of disaster body; early warning command; investigation database; disaster prevention and control
• ISSN: 1674-487X; 1867-111X
• DOI: 10.1007/s12583-012-0246-5

Taking hundreds of pieces of hazardous geological maps （1 ： 10 000） of Three Gorges res-ervoir area （3GR） as background, we establish regional three-dimensional （3D） geo-hazard modelusing 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 representa-tion）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 plat-form for danger partition, stability evaluation, disaster prevention and control, early warning and command.