GRSG 35th Conference 2024 Abstract

Title: Norwegian Geotechnical Institute (NGI) Abstract for GRSG – InSAR for Geotechnical Applications and Geohazards

Author: Dyre Dammann

Organisation: NGI

Interferometric Synthetic Aperture Radar (InSAR) has become an indispensable tool for assessing ground stability and geohazards, offering unparalleled spatial coverage. This presentation will highlight the advantages of InSAR for such applications and presents the recent research by the Norwegian Geotechnical Institute (NGI) as well as through Inio, the collaborative partnership with Kongsberg Satellite Services (KSAT) aiming to enhance the value of InSAR for geotechnical applications.

NGI has been at the forefront of applying advanced InSAR techniques, such as Small Baseline Subset (SBAS) and Persistent Scatterers (PS) interferometry, to study geohazards and geotechnical monitoring. Research focuses on integrating InSAR data with other geospatial information to improve accuracy and reliability. This multidisciplinary approach not only aids in understanding ground dynamics but also supports the development of effective mitigation measures.

Case examples include monitoring the Nainital landslide, located in the Indian Himalayas. The region is highly susceptible to landslides, posing significant risks to the local population and infrastructure. Using InSAR, it has been possible to successfully map ground deformation in the area, identifying critical zones of instability. The findings from Nainital demonstrate the efficacy of InSAR in providing timely and actionable data, which is crucial for disaster preparedness and response.

Inio uses InSAR to monitor geotechnical conditions and unstable ground associated with a construction and infrastructure development as well as the monitoring throughout the energy sector in support of EOR and CCUS. By detecting early signs of ground movement, InSAR can enable timely interventions, ensuring the stability and safety of construction projects. This proactive monitoring helps mitigate risks and prevents potential failures, thereby safeguarding investments and enhancing the longevity of operations.