县级区域建设用地地质灾害危险性模糊数学综合评价——以甘肃省礼县为例

APPLICATION OF FUZZY MESSAGE SYNTHETICAL JUDGMENT METHOD TO THE ASSESSMENT OF THE RISK OF GEOLOGICAL DISASTERS FOR CONSTRUCTIVE LAND USE IN A COUNTY REGION——A CASE STUDY OF LIXIAN COUNTRY, GANSU PROVINCE

以甘肃省礼县为例,选用了岩土体性质、岩土体结构、地形坡度、降水量、植被覆盖率和人口密度等6个地质灾害活动要素,利用模糊综合评判的方法计算了礼县各乡镇地质灾害危险度,并用危险度等级结合区域自然环境条件和社会经济发展状况,按地质灾害危险性大小将礼县划分为四个区:东北中南地质灾害极危险区、北部地质灾害高危险区、西南部地质灾害中危险区和西部地质灾害低危险区。

Regional geological disaster assessment for constructive land use is catching more and more attention. To assess the risk of geological disasters, the author takes 6 factors, includinglithological characters, lithological structure, gradient slope, precipitation, degree of vegetation cover and population density, which have great influence on the development of geological disasters into account and use Fuzzy Message Synthetical Judgment method to calculate the risk degree of geological disasters in Lixian County. Combined it with natural surrounding conditions, the status of local society and economical development, the area was divided into 4 parts according to its risk of geological disasters.