测绘通报 ›› 2023, Vol. 0 ›› Issue (7): 142-148.doi: 10.13474/j.cnki.11-2246.2023.0215

• 技术交流 • 上一篇    下一篇

PS-InSAR技术在长江堤防沉降监测中的应用

石银涛1, 胡超1, 赵钢2, 侯婷婷3   

  1. 1. 南京工业大学测绘科学与技术学院, 江苏 南京 211816;
    2. 江苏省水利科学研究院, 江苏 南京 210017;
    3. 宁波大学地理与空间信息技术系, 浙江 宁波 315211
  • 收稿日期:2022-10-18 出版日期:2023-07-25 发布日期:2023-08-08
  • 通讯作者: 胡超。E-mail:202061223013@njtech.edu.cn
  • 作者简介:石银涛(1984-),男,博士,副教授,研究方向为测绘新技术在水利工作中的应用。E-mail:shitou7630@qq.com
  • 基金资助:
    江苏省水利科技项目(2019001;2020007;2021063;2021074);江苏省研究生科研与实践创新计划(SJCX22_0477)

The application of PS-InSAR in the monitoring of the settlement of the Yangtze River levee

SHI Yintao1, HU Chao1, ZHAO Gang2, HOU Tingting3   

  1. 1. School of Geomatics Science and Technology, Nanjing Tech University, Nanjing 211816, China;
    2. Jiangsu Provincial Hydraulic Research Institute, Nanjing 210017, China;
    3. Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China
  • Received:2022-10-18 Online:2023-07-25 Published:2023-08-08

摘要: 落实和推动长江治理与保护一直是长江水利工作的重大任务。沿江堤防工程作为保护沿江经济带发展的一道重要屏障,其形变监测是长江运营管理中重要的内容之一。InSAR作为一种新型、大尺度的监测手段,在水利工程隐患排查中具有巨大的推广价值。本文采用PS-InSAR技术和Sentinel-1A影像,提取了南京梅子洲及其周边江堤2020年4月—2022年1月的形变时空分布,并结合同期水准数据对其可靠性进行了验证。结果表明,长江侧堤防比夹江侧堤防形变更加明显。其中,靠近潜州处堤段形变速率可达-20 mm/a。总体而言,梅子洲江堤呈现出一致性的沉降形变,差异性形变不显著,堤防整体发生了轻微沉降;PS-InSAR观测的形变时空分布与水准数据具有较高的一致性,该技术适用于长江堤防沉降变化监测,且能为大尺度的长江堤防风险排查与早期隐患识别提供一种可行的技术手段。

关键词: 堤防, 沉降监测, 时间序列, PS-InSAR, Sentinel-1A

Abstract: Implementing and promoting the management and protection of the Yangtze River has always been a major task of the Yangtze River water conservancy work. As an important barrier to protect the development of the economic belt along the river, the deformation monitoring of the safety of the levee along the river is one of the important contents in the operation and management of the Yangtze River. As a new and large-scale monitoring method, InSAR has great promotion value in the investigation of hidden dangers of water conservancy projects. This paper uses PS-InSAR technology and Sentinel-1A image to extract the temporal and spatial distribution of deformation of Meizizhou in Nanjing and its surrounding levee from April 2020 to January 2022, and verify its reliability by combining the leveling data of the same period. The results show that the deformation of the levee on the Yangtze River is more obvious than that on the Jiajiang river, and the deformation rate of the levee near Qianzhou can reach -20 mm/a. Overall, the Meizizhou levee presents a consistent settlement deformation, and the differential deformation is not significant, indicating that the river levee in this area is relatively stable. PS-InSAR observation has a high consistency between the temporal and spatial distribution of deformation and the leveling data, indicating that this technology is suitable for monitoring the settlement changes of the Yangtze River levee, and can be used for large-scale Yangtze River levee risk investigation and analysis. Early identification of hidden dangers provides a feasible technical means.

Key words: levee, settlement monitoring, time series, PS-InSAR, Sentinel-1A

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