Landslide monitoring based on GB-SAR interferometry for the instable slopes of Yaoji reservoir

Landslide occurring around big reservoir and other water conservancy facilities affects the displaced residents´ living and the safety seriously. Recently, as a newly rising remote observation technique, ground-based synthetic aperture radar interferometry has been development and widely used in related investigation and assessment field since it has efficiency and accuracy advantages on monitoring instable slopes, dormant landslides and other hidden danger. In this contribution, it is introduced the 10-hours monitoring result of Yaoji reservoir. Further analysis indicates that there are two landslide regions in the study area and the maximum displacement value reached 4mm (in only 10 hours). According to the experiment results, it can be concluded that there were typical creep landslides or instable slopes around Yaoji reservoir, and GB-SAR can measure such displacements accurately with the precision of millimeter level.