时序InSAR形变梯度估计与城市建筑物风险评估:以北京平原为例  

Time-series InSAR deformation gradient estimation and urban buildings risk assessment:A case study in the Beijing Plain

作　　者：左世诚 董杰 廖明生[1] ZUO Shicheng;DONG Jie;LIAO Mingsheng(State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China;School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,武汉430079 [2]武汉大学遥感信息工程学院,武汉430079

出　　处：《地质科技通报》2024年第6期171-183,共13页Bulletin of Geological Science and Technology

基　　金：国家自然科学基金项目(42374013);国家重点研发计划课题(2023YFC3009404)。

摘　　要：城市地表的差异性形变易对其表面基础设施造成断裂、扭曲等威胁或损害,监测差异性形变并评估建筑物风险等级对人民生命财产安全至关重要。采用时序InSAR方法对Sentinel-1卫星数据进行时间序列分析,获取了研究区地表形变及空间形变梯度;结合夜光遥感数据、土地利用类型数据集、建筑物高程数据等多源外部数据,采用网络层次分析法计算了研究区的危险性和易损性指标,并由此开展了宏观风险评估;在微观层面上评估建筑物的风险性,识别潜在风险区域,对宏观风险评估结果进行补充,并进行对比实验验证了本研究的有效性。研究结果显示,朝阳区东部、通州区西北部具有较大的差异性形变;首都国际机场区域、安定南街附近等地区存在较高的风险性。因此,利用多源数据进行差异性形变监测和风险评估对城市安全运行具有重要意义。[Objective]Differential deformation of urban land surfaces can threaten or damage surface infrastruc-ture,leading to fractures and distortions.Monitoring spatial differential deformation and assessing associated risk levels are crucial for urban safety management.[Methods]This study employs Sentinel-1 satellite data and the time series InSAR techniques to analyze surface deformation over time,enabling the derivation of spatial-temporal deformation gradients.Hazard and vulnerability assessment factors are calculated using an analytic hierarchy process,integrating data such as nighttime light remote sensing,land use,and Chinese building height datasets.A macroscopic risk assessment is conducted,with supplementary microscopic-levelanalysis to assess building risks and identify potential high-risk areas.Comparison experiments verify the effectiveness of the research.[Conclusion]Significant deformation disparities are identified between the eastern Chaoyang District and the northwestern Tong-zhou District.In addition,high-risk areas are observed around the Capital International Airport region and the vic-inity of Anding South Street.Therefore,the study highlights the importance of multisource data for effectively moni-toring differential deformation to ensureurban safe.

关 键 词：时序InSAR 北京平原 空间形变梯度 夜光遥感 风险评估 城市建筑物 

分 类 号：P642.26[天文地球—工程地质学]