空地一体化技术在地质灾害调查评价中的应用——以粤北连州镇为例

Application of space-ground integration technology in geological hazard investigation and evaluation:A case study of Lianzhou town in northern Guangdong Province

粤北地区碳酸盐岩广泛分布,崩塌及岩溶塌陷等地质灾害较为发育,严重威胁当地人民生命财产和生产生活。本文以粤北地区连州镇为例,主要采用空地一体化的现代新技术手段,包括由机载LiDAR为主的航空遥感技术和由探地雷达、微动勘探、高密度电法、反磁通瞬变电磁法组成的综合物探技术,查明了该区岩溶塌陷灾害发育的地质背景条件、覆盖层特征、岩溶发育情况以及崩塌灾害发育特征、稳定性状态。研究成果可为该区国土空间规划、用地调整以及岩溶塌陷、崩塌等地质灾害的风险评价、监测预警、应急处置和工程治理等提供基础依据。

Geological disasters such as karst collapse and rock fall caused by the development of karst in the karst area of northern Guangdong are quite frequent,which seriously threaten the life and property of local people and their production.Taking Lianzhou town in northern Guangdong as an example,this paper mainly adopts modern new technology means of air-ground integration,including airborne remote sensing technology based on airborne LiDAR and integrated geophysical exploration technology composed of ground penetrating radar,micro-motion exploration,high-density resistivity method and inverse magnetic flux transient electromagnetic method.The geological background condition,cover layer characteristics,karst development,rock fall development characteristics and stability state of this area are identified.It provides the basis for national space planning,land use adjustment,risk assessment,monitoring and early warning,emergency disposal and engineering management of geological disasters such as karst collapse and rock fall.