| 王洪明,李如仁,高建,陈振炜.时间序列InSAR技术广域地表形变监测——以湖北省为例[J].贵州地质,2023,40(1):36-42 |
| 时间序列InSAR技术广域地表形变监测——以湖北省为例 |
| Wide-area Surface Deformation Monitoring Based on Time-series InSAR Technique——A case study of Hubei Province |
| 投稿时间：2022-10-31 |
| DOI： |
| 中文关键词: 时序InSAR 广域 地表形变监测 地质灾害 |
| 英文关键词:The sequential InSAR Wide-area Surface deformation monitoring Geological hazards |
| 基金项目:国家自然科学基金项目(编号:51774204)资助。 |
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| 中文摘要: |
| 中国地质灾害点分布较为广泛，人工调查和排查的手段在特殊地区无法开展地质灾害隐患的识别，为了满足大区域地质灾害普查的需要，提出利用时序InSAR技术对广域地表进行形变监测。本文利用4个轨道92景Sentinel 1影像，基于小基线子集技术，首先，基于特定的时空基线阈值筛选影像集合；其次，利用轨道参数与强度信息进行影像配准，同时利用DEM去除地形相位；然后，通过两次形变反演剔除大气延迟相位与噪声相位；最后，将视线向形变量转换为垂直向形变，生成湖北省省域沉降普查图。结果表明，全省最大沉降速率达51 mm·a-1，荆门市石膏矿区存在缓慢沉降，最大年沉降速率为212 mm·a-1，通过历史灾害资料及实地调查核实，时间序列InSAR技术在广域地表形变监测中的有效性，为全省地质灾害普查提供一种技术支持。 |
| 英文摘要: |
| In China，geological disaster sites are widely distributed，and manual investigation and investigation cannot be used to identify geological hazards in special areasFor example，to meet the needs of large-scale regional geological disaster survey，time-series InSAR technology is proposed to monitor the surface deformation in a wide areaIn this paper，four orbital 92-scene Sentinel 1 images are selected based on the small baseline subset techniqueSecondly，orbit parameters and intensity information are used for image registration，and DEM is used to remove topographic phaseThen，the atmospheric delay phase and noise phase are removed by two deformation inversionFinally，the line of sight is transformed into vertical deformation to generate the general subsidence map of Hubei ProvinceThe results show that the maximum subsidence rate of Hubei is 51 mm·a-1，and the maximum annual subsidence in Jingmen gypsum mining area rate is 212 mm·a-1The validity of InSAR technology in wide-area surface deformation monitoring is verified by historical disaster data and field investigation，which provides a technical support for geological disaster survey in Hubei province |
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