基于MT-InSAR技术的滑坡体形变监测

Landslide Meformation Monitoring Based on InSAR and Offset-tracking Technology

矿区开采致使山体发生形变,由微小形变逐渐演变为大梯度形变,变形量值逐渐增加,导致传统的差分干涉技术无法监测到大梯度形变,针对此问题本文利用多时相合成孔径雷达干涉测量(Multi-temporal Interferometric Synthetic Aperture Radar,MT-InSAR)技术对大梯度形变研究区进行滑坡体形变监测。本文详细阐述了合成孔径差分雷达技术、小基线集以及像素偏移量追踪技术的原理以及适用范围,并使用2017年4月至2019年1月的10景ALOS PALSAR-2数据采用三种方法应用在贵州省兴仁县发耳镇发耳村某矿区的滑坡监测中,充分验证了三种方法相结合的方式可有效监测到由山体蠕动而导致的山体滑坡。

Mining causes deformation of the mountain bodies,which gradually transforms from tiny deformation to large gradient deformation.As the value of deformation increases gradually,the traditional differential interference technology cannot monitor the large gradient deformation.Aiming at this problem,this paper uses multi-temporal interferometric synthetic aperture radar technology to monitor the landslide deformation in the large gradient deformation research area.In this paper,the principle and application of D-InSAR,SBAS-InSAR and offset-tracking are introduced.Three methods with 10 scenes ALOS PALSAR-2 data from April 2017 to January 2019 are used in the landslide monitoring of a mining area in Faer Village,Faer Town,Xingren County,Guizhou Province.It is fully verified that the combination of the three methods can effectively monitor landslide which caused by the creep of mountain bodies,and provide support for early identification of landslide hazards.