摘要
基于2004—2021年地质灾害详细调查资料,门头沟区地质灾害类型有崩塌、地面塌陷、滑坡、泥石流,规模均为小型,王平镇、大台街道、妙峰山镇分布密度较大。采用GIS技术、确定性系数模型等方法,对5项影响因素与地质灾害的相关性进行分析。分析结果显示:坡度、道路修建、降雨以及高程为门头沟区地质灾害发生的主要影响因素;高程100~800 m范围,微地貌坡度大于50°的斜坡为崩塌灾害易发区域;道路两侧<200 m范围内地质灾害点密度最大,随着缓冲距离的增大,灾害点密度逐渐减小,道路修建对诱发地质灾害起到促进作用;降雨为诱发地质灾害的主要因素之一,降雨量>650 mm的区域地质灾害发生概率较大。
Based on the detailed survey data of geological disasters from 2004 to 2021,the geological disasters in Mentougou in-clude such types as collapse,ground collapse,landslide and debris flow,mainly of small scales,but the distribution density is large in Wangping town,Datai street,and Miaofengshan town.Using GIS technology and determination coefficient model,the correla-tion between five impact factors and geological disasters is analyzed.The results show that:slopes with elevations between 100~800 m,and with microtopography slopes greater than 50°are prone to collapse disaster;the distribution density of geological haz-ard points is the highest within 200 m on both sides of the road;and with the increasing of the distance,the density gradually de-creases;road construction plays a positive role in inducing geological disasters;rainfall is one of the main factors to induce geo-logical disasters,and the occurrence probability of geological disasters is higher in regions with rainfall greater than 650 mm.
作者
郭英
GUO Ying(Beijing Institute of Geological Hazard Prevention,Beijing 100120,China)
出处
《城市地质》
2023年第3期1-8,共8页
Urban Geology
基金
北京市突发地质灾害应急调查技术服务(11000022T000000439462)
北京地区典型滑坡预警示范研究(11000023T000002059415)联合资助。
