利用时序 InSAR 监测长江沿岸地表沉降及其原因分析

IF 2.8 3区 地球科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS
Yuanyuan Chen, Lin Guo, Jia Xu, Qiang Yang, Hao Wang, Chenwei Zhu
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引用次数: 0

摘要

对长江沿岸地区的地面沉降进行时序监测对于维护江河稳定和灾害预警至关重要。本研究采用PS-InSAR和SBAS-InSAR技术,利用2015年4月至2021年11月期间获得的42幅Sentinel-1A图像,对南京长江沿岸的地面沉降进行了监测。对两种方法的精度进行了比较和验证,同时进行了综合分析,以确定土地沉降的空间分布特征和根本原因。两种方法与六个水准点数据之间的最大偏差不超过±5 毫米。在南京长江两岸 5 公里的缓冲区内,确定了四个沉降漏斗。对该地区地面沉降因素的分析表明,地下工程施工与运行、地面建筑面积增加、地质条件等都与地面沉降有一定的相关性。通过 PS-InSAR 和 SBAS-InSAR 技术获得的结果显示,监测结果具有高度一致性,在该地区,后一种方法的监测精度优于前一种方法。这项研究对指导长江沿岸城市地质灾害的科学管理具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Monitoring and Cause Analysis of Land Subsidence along the Yangtze River Utilizing Time-Series InSAR
Time-series monitoring of the land subsidence in the Yangtze River coastal area is crucial for maintaining river stability and early warning of disasters. This study employed PS-InSAR and SBAS-InSAR techniques to monitor the land subsidence along the Yangtze River in Nanjing, using a total of 42 Sentinel-1A images obtained between April 2015 and November 2021. The accuracy of both methods was compared and validated, while a comprehensive analysis was conducted to ascertain the spatial distribution characteristics and underlying causes of land subsidence. The maximum deviation between the two methods and six leveling point data did not exceed ±5 mm. Within the 5 km buffer zone on either side of the Yangtze River in Nanjing, four subsidence funnels were identified. Analysis of the factors contributing to land subsidence in this area indicates that underground engineering construction and operation, increasing ground building area, and geological condition all have certain correlations to the land subsidence. The results obtained through PS-InSAR and SBAS-InSAR technologies revealed a high degree of consistency in monitoring outcomes, and the latter method exhibited superior monitoring accuracy than the former one in this area. This study holds significant implications for guiding the scientific management of urban geohazards along the Yangtze River.
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来源期刊
ISPRS International Journal of Geo-Information
ISPRS International Journal of Geo-Information GEOGRAPHY, PHYSICALREMOTE SENSING&nb-REMOTE SENSING
CiteScore
6.90
自引率
11.80%
发文量
520
审稿时长
19.87 days
期刊介绍: ISPRS International Journal of Geo-Information (ISSN 2220-9964) provides an advanced forum for the science and technology of geographic information. ISPRS International Journal of Geo-Information publishes regular research papers, reviews and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. The 2018 IJGI Outstanding Reviewer Award has been launched! This award acknowledge those who have generously dedicated their time to review manuscripts submitted to IJGI. See full details at http://www.mdpi.com/journal/ijgi/awards.
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