王之栋, 文学虎, 唐伟, 刘晖, 王德富. 联合多种InSAR技术的龙门山-大渡河区域地灾隐患早期探测[J]. 武汉大学学报 ( 信息科学版), 2020, 45(3): 451-459. DOI: 10.13203/j.whugis20190064
引用本文: 王之栋, 文学虎, 唐伟, 刘晖, 王德富. 联合多种InSAR技术的龙门山-大渡河区域地灾隐患早期探测[J]. 武汉大学学报 ( 信息科学版), 2020, 45(3): 451-459. DOI: 10.13203/j.whugis20190064
WANG Zhidong, WEN Xuehu, TANG Wei, LIU Hui, WANG Defu. Early Detection of Geological Hazards in Longmenshan-Dadu River Area Using Various InSAR Techniques[J]. Geomatics and Information Science of Wuhan University, 2020, 45(3): 451-459. DOI: 10.13203/j.whugis20190064
Citation: WANG Zhidong, WEN Xuehu, TANG Wei, LIU Hui, WANG Defu. Early Detection of Geological Hazards in Longmenshan-Dadu River Area Using Various InSAR Techniques[J]. Geomatics and Information Science of Wuhan University, 2020, 45(3): 451-459. DOI: 10.13203/j.whugis20190064

联合多种InSAR技术的龙门山-大渡河区域地灾隐患早期探测

Early Detection of Geological Hazards in Longmenshan-Dadu River Area Using Various InSAR Techniques

  • 摘要: 合成孔径雷达干涉测量技术(interferometric synthetic aperture radar,InSAR)是探测地表形变的重要手段,然而差分干涉测量技术(differential InSAR,D-InSAR)、小基线集测量技术(small baseline subset InSAR,SBAS-InSAR)和永久散射体测量技术(permanent scatters InSAR,PS-InSAR)在地质灾害隐患早期调查的应用中各有利弊。联合使用3种InSAR技术对127景ALOS-2数据和96景Sentinel-1数据进行处理,并在龙门山-大渡河约60 000 km2的区域解译出840处地表形变。野外实地调查发现约70%的解译形变区存在形变迹象,分析发现形变区分布与地层结构、岩性和活动断层构造之间有较为紧密的联系。对典型形变区的不同InSAR监测成果进行了对比分析,验证了不同InSAR技术在地表形变监测应用中的一致性、准确性和可靠性。

     

    Abstract: Interferometric synthetic aperture radar (InSAR) technology is an important method to detect surface deformation. However, differential InSAR (D-InSAR), small baseline subset InSAR (SBAS-InSAR) and permanent scatters InSAR (PS-InSAR) have their own advantages and disadvantages in the early investigation of geological hazards. 127 ALOS-2 images and 96 Sentinel-1 images are processed by different InSAR techniques, and 840 surface deformations are interpreted in Longmenshan-Dadu River area. Through field investigation, it is found that about 70% of the interpreted areas show signs of deformation. The relationship between the distribution of deformation area, stratum structure, lithology and active fault is analyzed. The different InSAR monitoring results in typical deformation area are compared and analyzed. The consistency, accuracy and reliability of different InSAR technologies in the application of surface deformation monitoring are verified. We provide a reference for the engineering application in early detection of geological hazards using various InSAR techniques.

     

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