Stability monitoring and analysis of submerged landslides in the Three Gorges Reservoir area based on time-series InSAR data and GNSS data

ABSTRACT

Precise landslide monitoring is crucial for understanding and mitigating their impact. The Three Gorges Dam has exacerbated landslides due to steep slopes and rising water levels. This study used ALOS-2 PALSAR-2 (2016–2017) and Sentinel-1A (2016–2018) data to monitor the Daping slope. Findings showed deformation rates of −86.3 mm/y (ALOS-2) and −62 mm/y (Sentinel-1A), confirmed by GNSS data. Analysis indicated that rainfall and water level fluctuations drive the Daping landslide, highlighting key factors influencing landslides in the Three Gorges region and their threats to life and property.

KEYWORDS:

• Three Gorges
• wading landslide
• time series InSAR
• correlation analysis

Acknowledgments

Thanks to the hydrogeology and engineering geology institute of Hubei geological bureau for the GNSS ground monitoring data and the ALOS-2 PALSAR-2 data. Thanks to ESA for the free Sentinel-1 data.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

Due to the nature of the research, due to [commercial] supporting data is not available.