| 基于SBAS-InSAR技术的天津地区地表沉降监测研究 |
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| 关键词:SBAS-InSAR urban subsidence surface deformation monitoring Tianjin area environmental geological survey engineering |
| 基金项目:中国地质调查局地质调查项目“华北地区自然资源动态监测与风险评估”(编号: DD20230101); “地质调查工作部署辅助决策支持系统建设”(编号: DD20242353) |
| 作者 | 单位 | E-mail | | 仝云霄 | 中国地质调查局天津地质调查中心, 天津 300170
华北地质科技创新中心, 天津 300170
天津市海岸带地质过程与环境安全重点实验室, 天津 300170 | tyunxiao@126.com | | 胡晓佳 | 中国地质调查局天津地质调查中心, 天津 300170
华北地质科技创新中心, 天津 300170
天津市海岸带地质过程与环境安全重点实验室, 天津 300170 | 278558023@qq.com | | 杨俊泉 | 中国地质调查局天津地质调查中心, 天津 300170
华北地质科技创新中心, 天津 300170
天津市海岸带地质过程与环境安全重点实验室, 天津 300170 | | | 王 威 | 中国地质调查局天津地质调查中心, 天津 300170
华北地质科技创新中心, 天津 300170
天津市海岸带地质过程与环境安全重点实验室, 天津 300170 | | | 孟中玙 | 中国地质调查局天津地质调查中心, 天津 300170
华北地质科技创新中心, 天津 300170 | | | 段霄龙 | 中国地质调查局天津地质调查中心, 天津 300170
华北地质科技创新中心, 天津 300170
天津市海岸带地质过程与环境安全重点实验室, 天津 300170 | | | 曹思琦 | 中国地质调查局天津地质调查中心, 天津 300170
华北地质科技创新中心, 天津 300170
天津市海岸带地质过程与环境安全重点实验室, 天津 300170 | |
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| Study on Land Surface Subsidence Monitoring in Tianjin Area Based on SBAS-InSAR Technology |
| Surface subsidence is one of the major geological disasters in Tianjin area, having a serious negative impact on social stability and economic development, causing significant economic losses annually. Therefore, it is necessary to conduct wide-area and efficient monitoring of surface subsidence. The 48 scenes ascending Sentinel-1A images and 48 scenes descending Sentinel-1B images of Tianjin area taken from January 2017 to December 2020, were used to monitor surface subsidence based on Small Baseline Subset InSAR (SBAS-InSAR) technology. The surface subsidence rates and cumulative subsidence results of Tianjin area were obtained. Moreover. The accuracy and reliability of the monitoring results were verified by internal coincidence accuracy and existing study results. The spatiotemporal variation characteristics and evolution laws of subsidence were analyzed, with a key study was conducted on typical subsidence areas based on subsidence profiles and land-use types. The results show that the subsidence distribution characteristics monitored by ascending and descending orbit data are essentially the same. The subsidence distribution in the Tianjin area was extensive and spatially uneven. Specifically, the six districts in Tianjin were relatively stable, while five typical subsidence funnels formed around the urban area, mainly concentrated in Wangqingtuo Town in Wuqing District, Shengfang Town in Bazhou City, Tuanbo Town in Jinghai District, Wangwenzhuang Town in Xiqing District, and Balitai Town in Jinnan District. During the monitoring period, the maximum surface subsidence rate reached 127.35 mm/a, and the maximum cumulative subsidence amount reached 378.21 mm. It was found that the subsidence in the Tianjin area is closely related to the over-exploitation of groundwater, the development of urban infrastructure, and the construction of large-scale projects. This study demonstrates the reliability of InSAR technology in monitoring surface subsidence in large areas, providing data support and an important decision-making basis for subsidence prevention and control, and offering reference significance for urban construction in Tianjin. |
| TONG Yunxiao,HU Xiaojia,YANG Junquan,WANG Wei,MENG Zhongyu,DUAN Xiaolong,CAO Siqi.2025.Study on Land Surface Subsidence Monitoring in Tianjin Area Based on SBAS-InSAR Technology[J].Acta Geoscientica Sinica,46(4):875-888. |
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