遥感技术在广东龙川县新田镇地质灾害调查的应用

Application of Remote Sensing Technology to Geological Hazard Investigation in Xintian Town Longchuan County Guangdong

地质灾害严重威胁社会经济建设和人们生命财产安全。为制定科学的防灾减灾策略,保障人民群众生命与财产安全。利用遥感技术宏观且全面的角度,通过多源遥感影像数据分析,结合区内已有地质灾害点和野外勘探,采用人机交互的综合方法,对广东龙川县新田镇进行岩性、构造、地质灾害解译,并分析地质灾害与发生时间、地形地貌、构造、人类活动的关系,确定滑坡、地质灾害隐患、崩塌等地质灾害的类型、规模及空间分布特征,结果表明,共解译地质灾害地灾点136处;地质环境点3处,且规模以小型为主;在时间上,集中在5—8月的雨季且具有滞后性;地质灾害整体发育程度北部大于南部,集中在380~460 m高程坡度低于30°坡向东北到北部的低山丘陵区;人类活动是地质灾害隐患点发育的主要因素。通过遥感地质灾害解译及实地验证,可有效识别和监测各类地质灾害情况,对新田镇地质灾害防治规划有指导意义。

Geological disasters seriously threaten social and economic construction and the safety of people’s lives and property.In order to formulate scientific disaster prevention and mitigation strategies to ensure the safety of people’s lives and property.Using remote sensing technology from a macroscopic and comprehensive perspective,through multi-source remote sensing image data analysis,combined with existing geological hazard points and field exploration in the area,and using the comprehensive method of human-computer interaction,this paper interprets lithology,structure and geological disasters in Xintian town,Longchuan county,Guangdong,analyzes the relationship between geological disasters and occurrence time,topography and geomorphology,structure and human activities,and determines the types,scale and spatial distribution characteristics of geological disasters such as landslides,geological hazards and collapses,and the results show that a total of 136 geological hazard disaster points are interpreted.There are 3 geological environment points,and the scale is mainly small;In terms of time,it is concentrated in the rainy season in May—August and has a lag;The overall development degree of geological disasters is greater in the north than in the south,and are concentrated in the low hilly area with an elevation slope of 380~460 m below 30°slope to the northeast to the north.Human activities are the main factors in the development of geo-logical hazard points.Through remote sensing geological disaster interpretation and field verification,various geological disasters can be effectively identified and monitored,which has guiding signifi-cance for the planning of geological disaster prevention and control in Xintian town.