甘肃天水市北山地质灾害危险度区划  

Geological hazard zoning in Beishan Mountain of Tianshui District

作　　者：辛存林[1] 施紫越 任文秀[2] 仵慧宁[3] Xin Cun-lin;Shi Zi-yue;Ren Wen-xiu;Wu Hui-ning(College of Geograghy and Environmental Science,Northwest Normal University,Lanzhou 730070,China;Geological Survey of Gansu Province,Lanzhou 730000,China;School of Pailie Petroleum Engineering,Lanzhou City University,Lanzhou 730070,China)

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070 [2]甘肃省地质调查院,兰州730000 [3]兰州城市学院培黎石油工程学院,兰州730070

出　　处：《兰州大学学报（自然科学版）》2020年第1期16-24,共9页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金资助项目(41262001,41662013);甘肃省科技支撑基金项目(1104FKCA116);甘肃省高等学校科研项目(2014A-098);甘肃省天水市秦城区建设局基金项目(GS0001-C03005-2010-010).

摘　　要：依据北山地质灾害的形成机制,选取地层岩性、断裂构造、多年平均降水量、交通道路、山坡坡向、沟岸坡度、沟谷密度,地形起伏度8个评价指标,利用层次分析法研究了各指标与地质灾害间的关系,建立以ArcGIS 10.2为平台的危险度区划模型,完成天水市北山地质灾害危险度区划图.结果表明:天水市北山高危险区面积41.61 km^2,占研究区总面积的29.72%;中危险区面积33.84 km^2,占研究区总面积的24.17%;低危险区面积64.13km^2,占研究区总面积的45.81%,所得区划结果与各地质灾害区域的分布特征相吻合.In accordance with the mechanism of geological hazards,a model of analytic hierarchy process evaluation was used to divide hazard degrees by integrating eight factors:lithology,fractural structure,annual average precipitation,traffic road,hillside aspect,slope,gully density and relief amplitude.Consequently,a map of risk zoning of geological hazard in Beishan Mountain was finalized for reference to the local community based on ArcGIS 10.2.The results showed that the hazard areas of high,medium,low danger occupied 41.61,33.84,64.13 km^2 respectively,accounting for 29.72%,24.17% and 45.81% respectively,which coincided with the distribution characteristics of the geological hazard area.

关 键 词：地质灾害 危险度区划 层次分析法 天水市北山 

分 类 号：P694[天文地球—地质学]