Research On Comprehensive Regionalization Of Geological Disasters In Fushun Urban District And Fushun County Based On GIS

Fushun urban district and Fushun County is located in junction of liao river rift basin and the uplift-zone of liaodong.The geological disasters often occur in the influence of topographical ground feature, geologic structure, stratum rock gender and humanity engineering activities in recent years, geological disasters have strongly threatened human beings'lives,wealth, property security and have been the hinder the sustainable development of regional society and economy.The article combines work of geological disaster survey item"The survy and Zoning of geological disaster in the Fushun urban district and Fushun County of Liaoning province"issued by the Minstry of Land and Resource P.R.C,use the disaster and territorial geological environment data investigated on the spot, the type of geological disasters, the scale, characteristics of development and distribution. According to the disaster status of Fushun urban district and Fushun County, study with comprehensively pregnant disaster environment, disaster-causing factors and body for disaster, constitute by the regional geological structure, topography, lithology, rock and soil characteristics, human activities, disaster intrusive and so on.Based on different types of geological disasters, disaster preparedness mechanism of different bodies, disaster-causing factors and geological disasters points in the spatial distribution, set up multi-source spatial database. Combination with pre-treatment of impact of geological disasters, study of spatial distribution law of geological disasters in the occurrence and development. Application of GIS technology, such as equivalent area analysis, buffer analysis, spatial overlay analysis, network analysis and other methods. According to quantitative results of the disaster impact of the spatial distribution, set up score zone of influencing factors of geological disasters. According to severity of disasters of landslides, mud-rock flows, ground subsidence, ground fissures ,set up equivalent zone of every disaster. Based on gray correlation analysis method, determine the impact of kinds of geological disasters in the overall study area. Use the way of AHP to determine the degree of disaster factors. Set up the source of many geological disasters DTM Data Model after space Superposition of Disaster-causing factors and the results of disaster point equivalent, and divide the evaluation unit by Superposition space. Determine kinds of geological disasters'disaster-prone districts and general geological disasters. Use fuzzy mathematics to evaluate geological disasters, and determine the general regional of geological disasters. Use the of mathematical methods of cluster analysis to determine clustering general region of geological disasters, In the last, according to the characteristics of zoning district, general analysis of the characteristics of geological disasters, and the internal occurrence mechanism, reveal the spatial distribution of geological disasters.