SBAS-InSAR在岩溶区地面沉降监测中的应用——以崇左市江州区为例
Application of SBAS-InSAR in monitoring ground subsidence in karst areas:a case from Jiangzhou District of Chongzuo
宁文怡 1韦梁盛 2贺雨晴 1蒋宇雯1
作者信息
- 1. 广西壮族自治区自然资源信息中心,南宁 530028
- 2. 广西创新建筑工程质量检测咨询有限公司,南宁 530031
- 折叠
摘要
利用SBAS-InSAR技术对拍摄的 2020 年 25 景Sentinel-1A数据进行处理,获得了广西崇左市江州区内的地面沉降信息,并结合相同时段的高分辨率遥感影像对形变原因进行对比分析.结果表明:江州区小范围区域上最大形变速率为-40.96 mm/a,中心城区最大形变速率为-30.00 mm/a,并呈大范围、连续的形变现象,城区北部最大形变率为 10.00 mm/a并存在部分区域抬升趋势.与CORS站点测量数据进行对比,利用SBAS-InSAR技术反演结果与CORS站沉降量最大差值为2 mm,最小差值为-3 mm,两者获取的结果基本相符,验证了SBAS-InSAR技术在喀斯特区域地面沉降的可行性.
Abstract
The 25 scenes of Sentinel-1A data taken in 2020 were processed by SBAS-InSAR,and the land sub-sidence information in Jiangzhou District of Chongzuo is obtained.The causes of deformation are compared and analyzed by high-resolution remote sensing images from the same period of time.The results show that in terms of deformation rate,the maximum deformation rate in a small area of Jiangzhou District is-40.96 mm/a,the maximum deformation rate in central area is-30.00 mm/a and presents a large-scale and continuous deforma-tion,and the maximum deformation rate in northern part of the city is 10.00 mm/a and has a rising trend in some areas.Compared with measurements of CORS,the maximum difference between inversion results of SBAS-InSAR and settlement amount of CORS station is 2 mm,and the minimum difference is-3 mm.The results ob-tained by the two methods are basically consistent,which verifies the feasibility of SBAS-InSAR for ground set-tlement in karst areas and can effectively monitor ground settlement.
关键词
SBAS-InSAR技术/地面沉降/累计形变量/监测Key words
SBAS-InSAR/land subsidence/accumulated settlement/monitoring引用本文复制引用
基金项目
国防科工局高分辨率对地观测系统重大专项(84-Y40G07-9001-15/18)
广西科技重大专项(桂科AA18118048)
出版年
2024
国家科技期刊平台
NSTL
万方数据