Guidelines for InSAR Monitoring of Landslides in Canada

摘要

Satellite radar interferometry (InSAR) techniques are increasingly being used for slope stability assessment and monitoring rates of movement. In this paper we provide a summary of published case studies in Canada that assisted in producing guidelines for InSAR monitoring of gradual landslide motion. With the exception of the Frank rock avalanche all the landslides are in vegetated areas and as such installed trihedral corner reflectors were used as permanent scatters. This is very typical of most Canadian landslides. Differential InSAR technique, using two or three scenes, provide a more general and simple snap shot of slope motion. PSInSARTM/ CTM TM and Squeeze SAR TM processing techniques are more complex using more than twenty repeat pass scenes. They show the spatial and temporal heterogeneities of the terrain movements and can assist in defining the parameters controlling the dynamics of low-velocity landslides.