The Application of InSAR in the Deformation Monitoring for Road Engineering - A Case Study: Dujiangyan, China

摘要

Synthetic aperture radar interferometry (InSAR) is a novel space observation technique from satellite which enjoys the merits of high spatial resolution, high precision and area matrix surveying. Especially, the Differential InSAR (DInSAR) technique has been applied to detect and monitor ground deformation. In this study the displacement on line of sight has been acquired with two-pass DInSAR processing and the accuracy of the deformation before and after the Wenchuan earthquake along an arterial road has been analyzed. It is proved that InSAR can obtain the deformation information of the road engineering after various natural and manual disasters quickly and precisely. And InSAR has been a powerful supplement for the traditional ground-based survey instruments.