测绘通报 ›› 2025, Vol. 0 ›› Issue (7): 19-25,72.doi: 10.13474/j.cnki.11-2246.2025.0704

• 学术研究 • 上一篇    下一篇

大型引水工程地面沉降PS-InSAR监测与分析

熊春宝1, 安贺雯1, 苏广利1,2   

  1. 1. 天津大学建筑工程学院, 天津 300350;
    2. 中国地震局第一监测中心, 天津 300180
  • 收稿日期:2024-12-03 发布日期:2025-08-02
  • 通讯作者: 安贺雯。E-mail:anhw1999@163.com
  • 作者简介:熊春宝(1964—),男,博士,教授,研究方向为地面沉降监测。E-mail:luhai_tj@126.com
  • 基金资助:
    国家重点研发计划(2023YFC3009301);天津市自然基金面上项目(23JCYBJC01090)

PS-InSAR monitoring and analysis of ground subsidence in large-scale water diversion project

XIONG Chunbao1, AN Hewen1, SU Guangli1,2   

  1. 1. School of Civil Engineering, Tianjin University, Tianjin 300350, China;
    2. The First Monitoring and Application Center, China Earthquake Administration, Tianjin 300180, China
  • Received:2024-12-03 Published:2025-08-02

摘要: 南水北调工程是一项旨在缓解南北方水资源分配不均问题的国家战略工程,对工程沿线进行地表形变监测可以识别安全隐患,对这一大型引水工程的安全运行具有重要意义。本文首先基于覆盖南水北调中线工程天津支线2020年7月至2023年6月的45景Sentinel-1A影像数据,采用永久散射体干涉测量技术(PS-InSAR)对研究区域进行地表沉降监测,得到了该地区的年平均沉降速率和累积沉降量;然后与全球导航卫星系统(GNSS)数据对比,验证了PS-InSAR技术测量地表形变的可靠性。结果表明,研究时间内研究区平均地表沉降速率范围为-72.26~17.30 mm/a;天津支线工程经过两个明显的沉降区,分别位于保定市雄县和廊坊市固安县交界处、廊坊市霸州市东部;影响该地区地面沉降的主要原因包括地下水的过度开采、城市基础设施建设及工业化进程加速导致的地面荷载增加;通过对地下水位的变化曲线与地面累计沉降量的对比可知,研究区的地表形变整体上相较于地下水位变化滞后约1~3 年。

关键词: PS-InSAR, 地面沉降监测, 南水北调中线工程

Abstract: The South-to-North Water Diversion project is a national strategic project aimed at alleviating the problem of unequal distribution of water resources between the south and the north. Ground deformation monitoring along the project can identify potential safety hazards and is greatly significant to the safe operation of this large-scale water diversion project. 45 Sentinel-1A imagery data from July 2020 to June 2023 are acquired for the Tianjin branch of the South-to-North Water Diversion project.Persistent scatterer interferometric synthetic aperture radar (PS-InSAR) is used to monitor the ground subsidence in the study area. The average annual rate and the cumulative amount of subsidence in the area are obtained. The reliability of PS-InSAR in measuring ground deformation is verified by comparing with the data of Global Navigation Satellite System (GNSS).The results show that the average ground subsidence rate in the study area ranges from -72.26 to 17.30 mm/a during the study time. There are two obvious subsidence zones along the Tianjin branch, which one is located at the junction of Xiongxian county and Gu'an county, and another the eastern part of Bazhou city. The main reasons of ground subsidence in the area include over-exploitation of groundwater and the increase of ground loads due to urban infrastructure construction and accelerated industrialization.The lag time of ground deformation in the study area compared to groundwater level changes is about 1 to 3 years.

Key words: PS-InSAR, monitoring of ground subsidence, middle route of the South-to-North Water Diversion project

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