InSAR-based monitoring and analysis of deformations induced by typical major geological hazards
SU Yunru1,2,3(), SHI Pengqing1,2,3(), ZHOU Xiaolong1,2,3, ZHANG Juan1,2,3
1. Lanzhou Field Scientific Observatory for Urban Geological Hazards, Lanzhou 730050, China 2. Gansu Geological and Environmental Monitoring Institute, Lanzhou 730050, China 3. Gansu Geological Hazard Data and Application Center of High Resolution Earth Observation System, Lanzhou 730050, China
Given its all-day availability, all-weather adaptability, and high spatial resolution, the interferometric synthetic aperture radar (InSAR) technique has been widely applied in multiple fields, demonstrating strong adaptability and high practical value. Focusing on two typical landslide areas in Zhouqu County, Gansu Province, this study compared small baseline subset InSAR (SBAS-InSAR) monitoring results and Kalman filter prediction results with monitoring data from the global navigation satellite system (GNSS), confirming the reliability and accuracy of the SBAS-InSAR technique in monitoring landslide deformations. The results indicate that the SBAS-InSAR technique exhibited significant advantages in monitoring areas with deformations induced by geologic disasters, effectively overcoming the limitations of traditional monitoring means. This technique can provide critical technical support and scientific basis for early warning and management of geologic disasters in Zhouqu County and other areas prone to suffer these disasters.
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