Articles

Geo-hazard Susceptibility Evaluation of Mianyang City Based on Fuzzy Comprehensive Evaluation

  • WANG Zhe;YI Facheng;CHEN Tingfang
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  • School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010,Sichuan Province, China

Received date: 2012-08-14

  Revised date: 2012-09-10

  Online published: 2012-10-28

Abstract

On the basis of the relation distribution of geological hazards with prenatal environment and induced factors of geological hazards, the system of evaluation index and the standard and method for index quantification are established. At the same time, the weights of assessment indicators for geo-hazard susceptibility evaluation are ascertained by using analytic hierarchy process. And then, the fuzzy distinguish matrix upon the strength of membership function is established by combining analytical hierarchy process with fuzzy synthesize evaluation. The fuzzy synthesize assessment method selects the two-level model, and the evaluation set has four-stage standard, that is, the degree of geological hazard occurrence probability is divided into four stages. The not easy occurrence zone of geological hazards includes 810 grid units, its area is 12960 km2, the low probability occurrence zone of geological hazards includes 157 grid units, its area is 2512km2, the middle probability occurrence zone of geological hazards includes 66 grid units, its area is 1056 km2, and the high probability occurrence zone of geological hazards includes 253 grid units, its area is 4048km2. At the same time, zoned maps are drawn in the light of the evaluation result.

Cite this article

WANG Zhe;YI Facheng;CHEN Tingfang . Geo-hazard Susceptibility Evaluation of Mianyang City Based on Fuzzy Comprehensive Evaluation[J]. Science & Technology Review, 2012 , 30(31) : 53 -60 . DOI: 10.3981/j.issn.1000-7857.2012.31.008

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