摘要
康乐县位于黄土高原与青藏高原过渡地带,区内发育的地质灾害有滑坡、崩塌、泥石流、不稳定斜坡等。本文结合地质灾害危险区划分方法,算出每个分区数字化的地质灾害危险性指数W危,分析研究地质环境分区的典型代表单元与地质灾害危险性指数的对应关系,按确定的阈值,以GIS为平台,结合定性分析,主要考虑历史灾情、地质灾害隐患点的分布、地质灾害威胁人口数量及直接经济损失预估等综合因素,将工作区划分为地质灾害高危险区(Ⅰ)、中危险区(Ⅱ)、低危险区(Ⅲ)3个区,共13个亚区。评价结果符合现实条件,取得了为城市发展提供地质基础资料的目的。
Kangle County is located in the transitional zone between the Some Random Place Somewhere and the Tibetan Plateau,where landslides,landslides,debris flows,unstable slopes and other geological hazards develop.In this paper,the digital geological hazard risk index of each Subarea is calculated,and the corresponding relationship between representative units of Geological Environment Subarea and geological hazard risk index is analyzed According to the determined threshold,taking GIS as the platform and combining qualitative analysis,the comprehensive factors such as the historical disaster situation,the distribution of the hidden danger spots of the geological disaster,the number of the population threatened by the geological disaster and the estimation of the direct economic loss are considered The work area is divided into three subareas:high-risk area(Ⅰ),medium-risk area(Ⅱ)and low-risk area(Ⅲ),which are 13 sub-areas.The evaluation results are in line with reality,and the aim of providing geological basic data for urban development has been achieved.
作者
孙富强
尹念文
SUN Fu-qiang;YIN Nian-wen(Key Laboratory of Groundwater Engineering and geothermal resources in Gansu Province,Lanzhou 730050,China;Gansu geological environment monitoring Institute,Lanzhou 730050,China)
出处
《世界有色金属》
2019年第22期133-134,共2页
World Nonferrous Metals
关键词
地质灾害
危险性分区评价
GIS
康乐县
Geological Hazard
Hazard zonation assessment
GIS
Kangle County
作者简介
孙富强,男,汉,生于1990年11月,甘肃兰州人,本科,工程师,研究方向:水工环地质。
