Two-dimensional deformation characteristics and influencing factors of the Qingliucun landslide in Lixian County by using time-series InSAR
[Objective]Landslide disasters occur frequently in the mountainous areas of Southwest China,and a large number of landslide disasters have caused serious impacts on the production and life of the residents in the region,so it is necessary to carry out long time series monitoring of landslide disasters in order to explore their deformation characteristics.[Methods]In this pa-per,we take the landslide events H01 and H02 in Qingliu Village,Lixian County,Sichuan Province,in 2020 as an example,and invert the surface motion process before and after the landslide destabilisation based on the SBAS-InSAR method,and obtain the 2D deformation characteristics of the landslides based on the two-dimensional decomposition model by combining the ascend-ing and descending orbital data.[Results]The result show that the maximum deformation velocity in the horizontal direction(E-W)are-43 mm/a and-9 mm/a for landslide H01 and landslide H02,respectively,and the maximum deformation velocity in the vertical direction(U-D)are-76 mm/a and-34 mm/a for landslide H01 and landslide H02,respectively,[Conclusion]and the result show that the landslide in Qingliu Village has been in an unstable state after the early destabilisation,and there is a tendency of further destabilisation.In order to further investigate the spatial deformation characteristics of the landslides in Qingliu Village,the effects of rainfall and gravity on landslides H01 and H02 were investigated in depth.This study provides a reference for the analysis of InSAR result of small landslides in mountainous areas,and also provides support for the subsequent risk management of landslides in Qingliu Village.
landslideSBAS-InSAR2D decompositioncharacteristics of deformationinfluencing factors
万方数据
维普
