基于时序InSAR技术的南昌市地表形变监测分析
Analysis of Surface Deformation Monitoring in Nanchang Based on Time Series InSAR Technology
张震 1夏元平 1王霞迎 1逯登科1
作者信息
- 1. 东华理工大学测绘与空间信息工程学院,330013,南昌
- 折叠
摘要
随着经济的快速发展,城市化进程不断加快.在人为的过度开发及自然因素的影响下,城市地表发生缓慢形变.精确且长时序的城市地表监测,对保障人民生活、防范潜在风险有着重大意义.选取了 2021 年 1 月至2023 年 1 月覆盖南昌市区的 38 景Sentinel-1A影像,采用结合PS地面控制点的SBAS-InSAR技术进行处理,获取了沉降速率和累计形变量等地表形变信息,并与PS-InSAR结果交叉验证,确定其可靠性.研究表明,2 种方法得到的监测结果具有较强相关性,相关系数达 0.895 6.南昌市形变总体稳定,大体可以分为 3个沉降区和 1 个抬升区,结合地质构造、地下水特征和老旧小区改造资料,分析地表形变特征成因.
Abstract
With the rapid development of economy and the continuous acceleration of urbanization process,under the influence of human over-development and natural factors,the urban surface de-formation occurs slowly.Accurate and long-term urban surface monitoring is of great significance to protect people's lives and prevent potential risks.In this paper,38 Sentinel-1A images covering the urban area of Nanchang from January 2021 to January 2023 were selected and processed by SBAS-InSAR technology combined with PS ground control points to obtain surface deformation information such as settlement rate and cumulative shape variables,and cross-verified with PS-InSAR results to determine its reliability.Research has shown that the monitoring results obtained by the two methods have strong correlation,with a correlation coefficient of 0.895 6.The deformation of Nanchang city is generally stable,which can be divided into 3 subsidence areas and 1 uplifting area.The causes of surface deformation characteristics are analyzed based on geological structure,groundwater charac-teristics and reconstruction data of old districts.
关键词
地表形变/南昌市/PS-InSAR/SBAS-InSAR/形变分析Key words
surface deformation/Nanchang/PS-InSAR/SBAS-InSAR/deformation analysis引用本文复制引用
基金项目
国家自然科学基金(41962018)
国家自然科学基金(42174055)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据