摘要
地质灾害是京津冀地区主要的环境地质问题之一,影响区域生态过程和生态系统服务功能,开展地质灾害易发性评价有利于生态安全格局构建和优化。集成地质灾害和致灾因子数据,构建地质灾害易发性评价指标体系,分别选择层次分析法、敏感性指数法、二元Logistic回归法、信息量法和普通最小二乘法开展地质灾害易发性评价的对比研究。研究表明:全区地质灾害易发性宏观分布格局在3个地貌单元基本一致,地质灾害易发性指数在华北山区最高,华北平原次之,内蒙古高原最低;5种不同方法均是本区地质灾害易发性评价的可行方法,在不同的空间尺度及生态地质环境背景下各有优点;综合易发性指数特征统计法、曲线下面积法与地质灾害点密度相关性统计法结果,普通最小二乘法、信息量法和二元Logistic回归法的评价效果相对较好;通过不同地貌单元最佳评价结果镶嵌的方法,可以有效地集成不同方法的易发性评价结果。本研究可以为省域及更大尺度的地质灾害易发性评价提供借鉴。
As one of the major environmental geological problems,geological disasters affect regional ecological processes and ecosystem service functions in the Beijing-Tianjin-Hebei region.Therefore,the assessment of the susceptibility of geological disasters is conducive to the construction and optimization of ecological security patterns.We integrated geological hazard data and disaster-causing factor data.After constructing the susceptibility evaluation index system,we chose the analytic hierarchy process,sensitivity index method,binary logistic regression method,information value method,and ordinary least squares method for comparative study.The research shows that the macro-distribution pattern of geological hazard susceptibility in the whole region is basically similar in the three geomorphic units.The geological hazard susceptibility index is highest in the North China mountainous area,followed by the North China Plain,and the Inner Mongolia Plateau is the lowest.Five different methods are all feasible for evaluating the susceptibility of the area,and each has its own advantages under different spatial scales and ecological geological environment backgrounds;Through testing of the susceptibility index feature statistical method,the area under the curve method,and the statistical method of the correlation with the density of geological disaster points,it is proved that the ordinary least square method,the information value method and the binary logistic regression method produce better evaluation results;by mosaicking the best evaluation results of different geomorphic units,the susceptibility evaluation results of different methods could be effectively integrated.This study can provide a reference for the susceptibility assessment of geological hazards at the provincial or larger spatial scale.
作者
赵银兵
陈利顶
孙然好
倪忠云
别小娟
ZHAO Yin-bing;CHEN Li-ding;SUN Ran-hao;NI Zhong-yun;BIE Xiao-juan(College of Tourism and Urban-Rural Planning,Chengdu University of Technology,Chengdu 610059,China;State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)
出处
《环境生态学》
2020年第4期27-38,50,共13页
Environmental Ecology
基金
国家重点研发计划项目(2016YFC0503001)
北京博士后基金(2018-ZZ-096)
成都理工大学的中青年骨干教师培养计划(2019JXGG01213)联合资助。
关键词
地质灾害
易发性评价
地貌梯度
生态安全
京津冀地区
geological hazards
susceptibility assessment
landform gradient
ecological security
Beijing-Tianjin-Hebei region
