| 时序InSAR解译2017~2020年北京地面沉降时空变化 |
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| 引用本文： | 张双成,许强,罗勇,雷坤超,牛玉芬,庞校光.时序InSAR解译2017~2020年北京地面沉降时空变化[J].大地测量与地球动力学,2022,42(1):48-53. |
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| 作者姓名： | 张双成 许强 罗勇 雷坤超 牛玉芬 庞校光 |
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| 作者单位： | 长安大学地质工程与测绘学院;地理信息工程国家重点实验室;北京市水文地质工程地质大队;中国科学院地质与地球物理研究所;河北工程大学矿业与测绘工程学院 |
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| 基金项目： | 国家重点研发计划(2019YFC1509802,2020YFC1512000,2018YFC1505102);地理信息工程国家重点实验室基金(SKLGIE2019-Z-2-1);国家自然科学基金(42074041,41731066);陕西省自然科学基础研究计划(2020JM-227)。 |
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| 摘 要： | 利用合成孔径雷达干涉测量（InSAR）技术对2017-06~2020-06期间获取的Sentinel-1数据集进行处理和分析，获取北京近几年地面沉降区域的时空分布特征。结果表明，北京地表形变呈现5处沉降区，最大年形变速率为-111.3 mm/a。将InSAR结果与GPS观测资料进行对比，验证了时序InSAR的有效性。对比2018年和2019年的年形变速率可知，各个沉降范围内的沉降面积均在减小，且沉降减缓的面积远大于沉降加速的面积。局部调查后发现，5处沉降区除1处仍在加速沉降外，其他4处的沉降速度均在减缓。
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| 关 键 词： | 北京 地面沉降 短基线集 Sentinel-1 |
Temporal and Spatial Variation of Land Subsidence in Beijing from 2017 to 2020 Interpreted by Time Series InSAR |
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| ZHANG Shuangcheng,XU Qiang,LUO Yong,LEI Kunchao,NIU Yufen,PANG Xiaoguang.Temporal and Spatial Variation of Land Subsidence in Beijing from 2017 to 2020 Interpreted by Time Series InSAR[J].Journal of Geodesy and Geodynamics,2022,42(1):48-53. |
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| Authors: | ZHANG Shuangcheng XU Qiang LUO Yong LEI Kunchao NIU Yufen PANG Xiaoguang |
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| Institution: | (School of Geological Engineering and Geomatics,Chang’an University,126 Yanta Road,Xi’an 710054,China;State Key Laboratory of Geo-Information Engineering,1 Mid-Yanta Road,Xi’an 710054,China;Beijing Institute of Hydrogeology and Engineering Geology,123 North-Xisihuan Road,Beijing 100195,China;Institute of Geology and Geophysics,CAS,19 West-Beitucheng Road,Beijing 100029,China;School of Mining and Geomatics Engineering,Hebei University of Engineering,19 Taiji Road,Handan 056038,China) |
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| Abstract: | To obtain the distribution characteristics of land subsidence in Beijing, we use the small baseline subset (SBAS) InSAR technology to analyze the sentinel-1 data stacks covering the period from June 2017 to June 2020. The results show that there are five subsidence areas in Beijing, and the maximum annual deformation rate is -111.3 mm/a. We compare time series InSAR measurements and GPS measurements. Comparing the annual rates of 2018 and 2019, the paper also determines that the settlement area is decreasing in each settlement range, and the area of slow settlement is much larger than that of accelerated settlement. The investigation of local subsidence indicates that subsidence in one of the five subsidence areas is still accelerating while the speed of subsidence in the other four subsidence areas is decreasing. |
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| Keywords: | Beijing land subsidence short baseline subset Sentinel-1 |
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