| GIS (Geography Information System) was developed by Chengdu University oftechnology,as an Information processing and analysis software.of technology a because of theInformation processing and analysis soft,and particularly convenient to use and simple,easy tolearn, and very suitable for application in the increase in geological disaster research.At homeand abroad,the GIS are widely used in the research of geological hazards assessment,and hasachieved fairly good results.This article’s analysis is based on the basic data of staff risking his life in danger, spendinga lot of manpower and financial resources in the hard field investigation to obtain them in thestudy area. Geological disaster evaluation tool is GIS software, the mathematical method withanalytic hierarchy process (AHP) and Grey Correlation Method, and Fuzzy ComprehensiveEvaluation Model is set up. Through the field investigation data, preliminary understand thedevelopment environment and the distribution characteristics of geological disasters.Throughthe processing and analysis of GIS, the influential factors of geological disasters and thedistribution of geological hazards development relations, and combining with the researchresults and experience of experts before, Through the Fuzzy Comprehensive Evaluation Model,evaluate the prone to geological disasters in the study area.Then through GIS we get mappingof geological disasters in the study area distribution.Finally, the two kinds of evaluation model,compare the results with the actual investigation to test feasibility of evaluation methods, andalso proves that the Grey Correlation Method to quantify the use of mathematical expectationis feasible. Finally, based on the above research, this paper puts forward the research ofprevention and cure Suggestions.The specific research results as follows:(1) Summarize the environmental situation in the study area,such as hydrology,meteorology, geological structure,earthquake, rainfall and other basic situation.Understand theresearch area of landslide, collapse,and then debris flow distribution of geological disasters,a combination of factors,find out to study the factors influencing the bigger of the geologicalhazards development,through the analytic hierarchy process (AHP) and light green todetermine the weighing values of correlation degree to quantify and other. Also we know that:Debris flow, a total of53, accounting for79.10%of the total number of disasters; the collapse,atotal of eight accounting for11.94%of the total number of disasters; Landslide, a total of three,4.48%of the total number of disasters; Sand dunes, a total of three,4.48%of the total numberof disasters.Then according to the Fuzzy Comprehensive Evaluation in the study area ofgeological hazards.(2) In this paper, the main achievements:choose forms of land (slope, elevation),stratalithology (engineering rock type),geological structure,structural impact value),annual averagerainfall and human engineering activities and geological disasters density those seven factors asevaluation index,combining with the expert experience and the survey data to determine itsweight.(3) In this paper, the technical difficulties mainly are quantitative evaluation system ofresume and indicators.(4) In this paper,I think the biggest harvest is the improvement and thinking ofdetermining the index weights of Grey Correlation Method by using the method ofmathematical expectation,.Blending in mathematical methods more geological disasterevaluation is a worth of work, although now the research emphasis has been focused on modeland method of before,but as long as we improve little by little,finally certainly can obtain theastonishing achievements,it will inspire me to move on. |
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