华南地质2025，Vol.41Issue(3)：590-603,14.DOI:10.3969/j.issn.2097-0013.2025.03.010
基于SBAS-InSAR技术的海口江东新区地面沉降监测及成因分析
Land subsidence Monitoring and Cause Analysis of the Haikou Jiangdong New Area Based on SBAS-InSAR Technology
摘要
Abstract
Haikou Jiangdong New Area is an important exhibition area for the construction of Hainan free trade port.It is of great significance to study the current situation of land subsidence in Jiangdong New Area for future urban development and construction.Synthetic aperture radar interferometry(InSAR)has the advantages of all-weather,all-time,wide monitoring range and high precision,which is widely used in geological disaster monitoring.In this paper,surface subsidence in Jiangdong New Area from 2017 to 2019 was monitored based on ALOS-2 PALSAR data and SBAS-InSAR technology.The results showed that land subsidence in Jiangdong New Area primarily manifested as slow,uneven areal and point-surface subsidence,with average deformation rates ranging from-25 to 5 mm/a.The primary subsidence zones were distributed along banks of the Nandu River,where maximum subsidence rates exceeded-20 mm/a,followed by areas adjacent to the Qiongzhou Strait and Dongzhai Port.During the monitoring period,land subsidence underwent three distinct phases:minor subsidence,localized subsidence,and a period of gradual subsidence combined with uplift.Subsidence rates exhibited an initial increase followed by a subsequent decrease.The main influencing factors of land subsidence in Jiangdong New Area included litho-soil types,land use types,and groundwater-level fluctuations.Compression deformation of extensively distributed soft soils along the Nandu River under external loading was identified as one primary contributor to land subsidence.Substantial loads imposed by intensive buildings exacerbated subsidence in soft soil zones.Furthermore,groundwater depression cone and groundwater level drop caused by foundation pit precipitation constituted another major factor influencing land subsidence in Jiangdong New Area.关键词
地面沉降/SBAS-InSAR技术/ALOS-2 PALSAR数据/海口江东新区Key words
land subsidence/SBAS-InSAR/ALOS-2 PALSAR data/Haikou Jiangdong New Area分类
地质学引用本文复制引用
王磊,张彦鹏,张正加,柯贤忠..基于SBAS-InSAR技术的海口江东新区地面沉降监测及成因分析[J].华南地质,2025,41(3):590-603,14.基金项目
中国地质调查局地质调查项目(DD20190304,DD20160259) （DD20190304,DD20160259）
