测绘通报 ›› 2022, Vol. 0 ›› Issue (6): 108-113.doi: 10.13474/j.cnki.11-2246.2022.0181.

• 技术交流 • 上一篇    下一篇

基于PS-InSAR技术的珠海市地表形变监测与驱动力分析

朱邦彦1, 唐超2, 任志忠3, 马状4, 张琪1, 李云1   

  1. 1. 南京市测绘勘察研究院股份有限公司, 江苏 南京 210019;
    2. 北京城建勘测设计研究院有限责任 公司, 北京 100101;
    3. 广州长地空间信息技术有限公司, 广东 广州 510663;
    4. 河海大学地球科学与 工程学院, 江苏 南京 211100
  • 收稿日期:2021-12-16 发布日期:2022-06-30
  • 通讯作者: 唐超。E-mail:tangchao0312@126.com
  • 作者简介:朱邦彦(1986-),男,博士,高级工程师,主要从事测量数据处理与InSAR时间序列分析工作。E-mail:byz@whu.edu.cn
  • 基金资助:
    广东省级促进经济高质量发展专项(GDNRC[2020]050)

Surface deformation monitoring and driving force analysis in Zhuhai city based on PS-InSAR technology

ZHU Bangyan1, TANG Chao2, REN Zhizhong3, MA Zhuang4, ZHANG Qi1, LI Yun1   

  1. 1. Nanjing Research Institute of Surveying, Mapping & Geotechnical Investigation Co., Ltd., Nanjing 210019, China;
    2. Beijing Urban Construction Exploration & Surveying Design Research Institute Co., Ltd., Beijing 100101, China;
    3. Guangzhou Changdi Spatical Information Technology Co., Ltd., Guangzhou 510663, China;
    4. School of Earth Science and Engineering, Hohai Unversity, Nanjing 211100, China
  • Received:2021-12-16 Published:2022-06-30

摘要: 基于63景Sentinel-1数据,采用PS-InSAR技术监测珠海市2018年10月—2020年11月地面沉降,利用GNSS地面同步观测数据进行精度评定,监测结果的均方根误差为4.58 mm,表明利用PS-InSAR监测研究区地面沉降具有较高的可靠性。分析珠海市地表形变的时空特征,结果表明,珠海市主体部分的平均形变速率在-55~15 mm/a,主要沉降区域分布在珠江水道周边的农垦区及沿海港口区域;主要交通线路为港珠澳大桥珠海连接线和广珠铁路珠海段,均存在年平均形变速率超过20 mm/a的明显形变异常区,需重点关注。结合地质条件、地下水开采情况对珠海市地表形变驱动力进行分析,结果表明,区域内地面沉降速率与软土层的厚度呈正相关,与地下水水位降深呈对数函数关系。

关键词: PS-InSAR, 地表形变, Sentinel-1数据, 珠海市, 形变驱动力

Abstract: Land subsidence of Zhuhai city from October 2018 to November 2020 was retrieved by PS-InSAR using 63 Sentinel-1 images. The inversion accuracy is verified by GNSS ground observation data. The root mean square error of monitoring results is 4.58 mm, which showes high reliability for PS-InSAR to monitor land subsidence in study area. The spatial and temporal deformation characteristics of the surface deformation in Zhuhai city are analyzed, and the results show that the average deformation rate of the main part of Zhuhai city are between -55~15 mm/a. The main subsidence areas are distributed in the agricultural reclamation area and coastal port area around the Pearl river waterway. The main transportation lines, Zhuhai link of the Hong Kong-Zhuhai-Macau bridge and Zhuhai section of Guangzhou-Zhuhai railway, both of them have obvious deformation areas with average annual deformation rate of more than 20 mm/a, which need to be paid attention. Using geological conditions and groundwater exploitation data, the driving force of surface deformation in Zhuhai is analyzed. The results show that the ground subsidence rate in study area is positively related to the thickness of soft soil layer, and logarithmically related to the underground water level.

Key words: PS-InSAR, surface subsidence, Sentinel-1 data, Zhuhai city, deformation driving force

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