| Chengdu Chongqing Economic Zone is located in the upper reaches of theYangtze River, is located in the Sichuan Basin, covering an area of20.6×104squarekilometers, is the important of China’s population, towns, industrial agglomerationarea. The transition zone planning area is located in the plain of the lower reaches ofthe Yangtze River in the Qinghai Tibet Plateau and the geomorphological types,complete, terrain undulation; geological structure is complex, the West for the relativeactivity of the Songpan Ganzi geosynclinal fold system, cross Yangtze paraplatformQinling Mountains fold system two tectonic units, Southwest of the Sanjiang foldsystem, construct a variety of forms; stratigraphic distribution is more complex,lithology is mainly carbonate rock and clastic rock in two categories. A variety ofgeological hazards and environmental geological problems in the area of people’s lifesafety and property with a serious threat, in order to realize the goal of ChengduChongqing Economic Zone, statistical problems of geological disasters in the area,analyses its formation mechanism, and put forward some control measures, theestablishment of disaster evaluation model and geological disasters on thesusceptibility the partition is particularly important. Through data collection,integration, making the distribution map of geological disasters in ChengduChongqing Economic Zone Development, analysis of relationship between thedistribution and the geological environment of Chengdu Chongqing Economic Zoneof geological disasters, geological disasters, geological background activity,influencing factors, predisposing conditions and harm; and select typical cases wereanalyzed. Analysis on the existing geological disasters, the study of its formationmechanism, and the establishment of geological disaster evaluation system ofChengdu Chongqing Economic Zone, compilation of geological disaster prone zoningmap. The paper has achieved the following results：(1) Based on the existing geological hazard information collection, map thedistribution of geological disasters in the Chengdu Chongqing Economic zone.(2) Combining with geological conditions of Chengdu Chongqing Economic Zone and a detailed analysis of typical geological disaster, for the development ofgeological hazards formation mechanism, influencing factors, predisposing conditionsand harm of objective, detailed discussion, get the distribution of geological disastersin the economic zone is mainly affected by the landform and geological structure ofthe terrain.(3) In the study area, debris mainly along the fracture zone of Longmenmountain, Wu Ping fault belt, Shashi fault zone, qiyaoshan fault zone, long Zunyifault zone and Huayingshan fault zone distribution; landslide distribution in anaverage slope of5degrees, the local terrain slope greater than30degrees andoverlying hard rock, slope higher than15meters area. From the perspective ofhardness degree of rock zone of economic collapse is mainly distributed in the softrock region, viewing from the geological structure zone of economic collapse ismainly distributed in the active faults, the distribution of more from the collapse ofregional rainfall Economic Zone annual rainfall less than1200mm; regional landslidealong the active fault zone, landslide in the earthquake intensity of7degrees andabove dominated region.(4) The formation mechanism, influencing factors, analysis of predisposingconditions and harm by means of geological hazards, adopt the method of fuzzymathematics, the establishment of different geological hazard susceptibility zoningevaluation model, simulation analysis is carried out using large GIS platform ofArcGIS software, the geological disaster reliable susceptibility evaluation parameters,and combining with the existing research results, experience, geological disasters inthe study area of susceptibility evaluation results are visualized the conversionoperation of Chengdu Chongqing Economic Zone by geological hazard susceptibilityzoning map. |
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