Abstract:In this paper, the glacier deformation is obtained by using offset-tracking technology as a supplement to SBAS-InSAR, and the pre-disaster deformation of Sedongpu basin is calculated by using two technologies from January 2018 to October 2018, and the pre-disaster deformation characteristics and influencing factors are jointly analyzed. The results show that the glaciers and gullies in Sedongpu basin were deformed before the ice avalanche occurred on October 17, 2018. The trend of the main deformation area of glacier is first accelerated, then gentle and then accelerated, with the deformation of -7.69 m from July to September. The sediments in channels showed a long-term downward trend, and the deformation rate accelerated after July. The temperature rise is the main factor for the occurrence of debris flow disaster. The combination of SBAS-InSAR and offset-tracking can meet the monitoring requirements of different deformation magnitudes, and can be used for early identification and deformation inversion of ice avalanche disasters, providing a reference for ice avalanche disaster prevention and control in the Tibetan plateau.
ZHANG Longyu,LI Sumin,YU Sunju et al. Research on Pre-Disaster Deformation of Sedongpu Basin Based on SBAS-InSAR and Offset-Tracking[J]. jgg, 2024, 44(6): 630-635.