融合时序InSAR形变的白银市地质灾害易发性评价

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中文摘要：现有地质灾害点/隐患点记录作为地质灾害评价的数据基础,存在时效性差、不全面的问题,而时序合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)技术能高时空分辨率地监测大范围地表形变.因此,如何将时序InSAR获取的形变信息融入地质灾害评价模型,已经成为地质灾害评价领域的研究热点之一.首先将时序InSAR监测得到的形变点代替现有地质灾害记录点,同时将其形变量级作为一个评价因子融入易发性评价模型,充分利用了时序InSAR获取的形变有效信息;然后采用耦合信息量和层次分析法模型,对中国甘肃省白银市进行地质灾害易发性评价及分区.通过已有地质灾害点数据的验证发现,在划定的极高易发区,10 km2内已有地质灾害点数可达近8个,而极低易发区内的点数不足1个,表明利用所提方法进行灾害易发性评价是可行的.

外文标题：Evaluation of Geological Hazard Susceptibility of Baiyin City Based on Multi-temporal InSAR Deformation Measurements

外文摘要：Objectives:Geological hazard points and hidden danger points are the data basis for geological hazard evaluation,while the existing records of geological hazard points have poor timeliness and are in-complete.To solve this problem,the deformation information obtained by multi-temporal interferometric synthetic aperture radar(InSAR)was integrated into the geological hazard evaluation model.And we explore how to make better use of the deformation information.Methods:The greater the deformation level,the greater the possibility of geological hazards.This paper not only takes the deformation points obtained by multi-temporal InSAR as the geological hazard points/hidden danger points,but also integrates the de-formation level information obtained by multi-temporal InSAR as an evaluation factor into the susceptibility evaluation model,making full use of the effective deformation information obtained by multi-temporal InSAR.And the evaluation model adopts the coupling model based on information value model and the analytic hierarchy process model to obtain the susceptibility evaluation and zoning of the geological hazards in Baiyin City,Gansu Province,China.Results:Through the verification of the existing geological disaster point data,it is found that the partitions in this paper are in good agreement with the existing geological hazard points distribution.In the designated extremely high-prone areas,there are nearly 8 geological disaster points within 10 km2,while less than one in the extremely low-prone areas.Conclusion:The multi-temporal InSAR deformation information added to the geological hazard evaluation model greatly improves the timeliness and quantity of records of geological hazard points/hidden points.However,only one kind of synthetic aperture radar data cannot completely identify all geological hazard points/hidden danger points,due to the limitations of incidence angle and microwave wavelength.In the futher work,we will focus on the combination of multiple deformation monitoring technologies to jointly monitor surface deformation,such as multi-sensor and multi-track InSAR technology,airborne light laser detection and ranging and high-resolution optical remote sensing.

外文关键词：

multi-temporal InSARgeological hazardsusceptibility evaluationinformation value modelanalytic hierarchy process

作者：

盖侨侨、孙倩、张宁、胡俊

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作者单位：

中南大学地球科学与信息物理学院,湖南长沙,410083

广东省水利电力勘测设计研究院有限公司,广东广州,510000

湖南师范大学地理科学学院,湖南长沙,410081

中国科学院地理科学与资源研究所,北京,100101

中国城市规划设计研究院(住房和城乡建设部遥感应用中心),北京,100835

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关键词：

时序InSAR 地质灾害易发性评价信息量模型层次分析法

基金：

国家自然科学基金湖南省自然科学基金湖南省自然科学基金湖南省重点研发项目湖南省重点研发项目福建省重点研发项目中国博士后科学基金&&

项目编号：

420301122020JJ20432022JJ300312023SK20122022RC30422021Y30012019M65082506-Y30F04-9001-20/22

出版年：

2024

DOI：

10.13203/j.whugis20220192

武汉大学学报(信息科学版)

武汉大学

武汉大学学报(信息科学版)

CSTPCD北大核心

影响因子：1.072

ISSN：1671-8860

年,卷(期)：2024.49(8)

参考文献量8