首页|广州北部丘陵区岩溶塌陷形成条件与易发性评价

广州北部丘陵区岩溶塌陷形成条件与易发性评价

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
岩溶塌陷是广州北部丘陵区主要地质灾害之一,对人民群众安全生产、和谐生活造成实际威胁,制约了当地乡村振兴发展.文章在分析广州北部丘陵区岩溶发育程度、覆盖层土体条件、地下水动力条件等岩溶塌陷形成条件的基础上,选择岩溶发育程度、土层厚度、土层结构、地下水水位年变幅、断裂影响范围、塌陷点密度等6个评价指标,利用层次分析法确定各指标权重,运用综合指数法建立岩溶塌陷易发性评价模型,进行广州北部丘陵区岩溶塌陷易发性评价.结果表明:广州北部丘陵区岩溶塌陷高、中等和低易发区面积分别为4.77,14.24,21.71 km,已发生的岩溶塌陷均分布在高易发区(94.29％)和中等易发区(5.71％),易发性分区评价合理.研究成果可为当地岩溶塌陷地质灾害预警和防治区划提供依据.
Formation conditions and susceptibility assessment of karst collapses in the northern hilly area of Guangzhou City
Karst collapse is one of the main geological disasters in the northern hilly area of Guangzhou City,posing practical threats to public safety and affecting harmonious living conditions,thereby constraining local rural revitalization and development.This study analyzes the formation conditions of karst collapses in the northern hilly area of Guangzhou,including karst development degree,conditions of overlying soil layers,and hydrodynamic conditions of groundwater.Based on this analysis,six evaluation factors—karst development degree,soil layer thickness,soil layer structure,annual variation range of groundwater level,extent of fracture influence,and density of collapse points—are selected.The weight of each factor is determined by analytic hierarchy process(AHP),and a comprehensive index method is employed to establish the susceptibility assessment model for karst collapses in the northern hilly area of Guangzhou City.The results show that the areas of high,moderate,and low susceptibility to karst collapses in this region are 4.77,14.24,21.71 km2,respectively.Karst subsidence occurrences are predominantly distributed in high vulnerability areas(94.29％)and moderate vulnerability areas(5.71％),validating the rationality of vulnerability zoning assessment.The research findings provide a basis for geological disaster early warning and prevention zoning for local karst collapse,and also provide geological support for promoting rural revitalization and development.

northern hilly area of Guangzhou Citykarst collapseformation conditionanalytic hierarchy processsusceptibility assessment

王忠忠、庄卓涵、胡飞跃、黄文龙

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广东省地质调查院,广东广州 510080

广州北部丘陵区 岩溶塌陷 形成条件 层次分析法 易发性评价

中国地调局地质调查项目中国地调局地质调查项目中国地调局地质调查项目广东省地质勘查与城市地质专项广东省地质勘查与城市地质专项

12120114022301DD20160252-06DD20160257-04[2019]-2[2020]-11

2024

10.16031/j.cnki.issn.1003-8035.202311008

中国地质灾害与防治学报
中国地质环境监测院

中国地质灾害与防治学报

CSTPCD
影响因子：1.096
ISSN：1003-8035
年,卷(期)：2024.35(4)
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