Abstract：Taking Shuicheng county, Guizhou province as the study area, we use SBAS InSAR to extract surface deformation fields by processing data from 2018-07 to 2019-07 for 31-period ascending and 30-period descending Sentinel-1A before the occurrence of the landslide in Jichang town, respectively. The results show that: 1) There is no obvious deformation information in SBAS InSAR results before Jichang landslide occurred, demonstrating that the potential landslides detection of Jichang landslide has exceeded the capability of SAR in the 12 d revisit period. 2) There are five obvious deformation zones in the study area, which may be related to slope instability, underground/open-pit mining and drainage of mineral processing. 3) The SBAS InSAR deformation results of the ascending and descending orbit data can be complementary and verified, significantly improving the ability of satellite radar for potential landslide detection and deformation monitoring in mountainous area. The research method can provide technical reference for the investigation and early identification of landslide hazards in Guizhou province and mountainous area of southwest China.
LIU Paiying,HE Shaoshuai,WANG Pengsheng et al. Early Identification of Landslide Hazards in Southwest Mountainous Area Using Ascending and Descending Sentinel-1A and SBAS InSAR[J]. jgg, 2022, 42(9): 892-897.
