摘要
北京以往的崩塌灾害研究多集中在密云、怀柔等地区,延庆地区的崩塌灾害较多但是研究较少,因此对延庆地区的崩塌灾害危险性进行了评价。综合考虑研究区的情况,从气象水文、地形地貌、地质条件、地质构造、植被及人类工程活动6个方面选取崩塌灾害危险性评价指标因子,年平均降雨量、至水系距离、坡向、坡度、地形起伏度、高程、地质岩性、至断裂距离、归一化植被指数(NDVI)、至道路距离、土地利用11个评价指标,对延庆地区建立基于ArcGIS平台利用信息量法—层次分析法模型,完成延庆地区崩塌灾害危险性评价。将延庆地区崩塌灾害危险性评价结果分为4类:极高危险、高危险、中危险和低危险。极高危险区占研究区面积的23.25%,主要分布在千家店镇、香营乡、珍珠泉乡等地区;高危险区占研究区总面积的27.57%,主要分布在延庆北东地区。危险性分区结果与崩塌灾害点实际分布相吻合,研究区的北东部地区是崩塌灾害分布密集区,主要影响因素是年均降雨量。
In the past,most of the researches on the collapse disaster in Beijing concentrated on Miyun and Huairou,while the collapse disaster in Yanqing area was more but less studied.Therefore,the risk of collapse disaster in Yanqing area was evaluated.Comprehensively considering the situation of the study area,the risk assessment index factors of collapse disaster were selected from six aspects:meteorology,hydrology,topography,geological conditions,geological structure,vegetation and human engineering activities.There are 11 evaluation indexes,such as average annual rainfall,distance to water system,slope direction,slope,topographic relief,elevation,geological lithology,distance to fault,normalized vegetation index(NDVI),distance to road,and land use[1].A model based on ArcGIS platform using information volume-analytic hierarchy process(AHP)was established for Yanqing region.The collapse hazard assessment in Yanqing area was completed.The results of collapse hazard evaluation in Yanqing area are divided into four categories:extremely high risk,high risk,medium risk and low risk.The extremely high risk areas accounted for 23.25%of the study area,mainly distributed in Qianjiadian Town,Xiangying Township,Zhenzhuquan Township and other areas.High risk areas accounted for 27.57%of the total area of the study area,mainly distributed in the northeast of Yanqing.The results of risk zoning are consistent with the actual distribution of collapse disaster points.The northern and eastern parts of the study area are densely distributed areas of collapse disasters,and the main influencing factor is the average annual rainfall.
作者
王惠聪
周爱红
袁颖
WANG Hui-cong;ZHOU Ai-hong;YUAN Ying(Hebei GEO University,Shijiazhuang 050031,China;Hebei Center for Ecological and Environmental Geology Research,Shijiazhuang 050031,China)
出处
《河北地质大学学报》
2024年第2期47-55,60,共10页
Journal of Hebei Geo University
基金
河北省自然科学基金项目(D2019403182)
河北地质大学科技创新团队项目(KJCXTD-2021-08)。
关键词
危险性评价
崩塌
信息量法
层次分析法
GIS
risk assessment
collapse
information method
analytic hierarchy process
GIS
