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Monitoring land subsidence in Joshimath, Uttarakhand using InSAR: A preliminary study

Authors
/persons/resource/shagun

Garg,  Shagun
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Karanam,  Vamshi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

/persons/resource/motagh

Motagh,  M.
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Mishra,  Vishal
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

/persons/resource/zhuge

Xia,  Zhuge
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/alinash

Shevchenko,  Alina V.
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/magda88

Stefanova Vassileva,  M.
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/roessner

Roessner,  S.
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Citation

Garg, S., Karanam, V., Motagh, M., Mishra, V., Xia, Z., Shevchenko, A. V., Stefanova Vassileva, M., Roessner, S. (2023): Monitoring land subsidence in Joshimath, Uttarakhand using InSAR: A preliminary study, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4938


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021338
Abstract
This study examines the land subsidence issue in Joshimath, a small hilly village in Uttarakhand, India. With the growing demand for infrastructure and services to accommodate the influx of tourists in the region, Joshimath has seen significant urbanization, leading to severe land subsidence. More than 900 houses in the region and roads have developed cracks, and the government has ordered the immediate evacuation of families in the area.To better understand and mitigate the risk of landslides in this area, this study implemented a remote sensing technique called Interferometric Synthetic Aperture Radar (InSAR) to monitor land subsidence in Joshimath over a period of 20 months (May 2021 - Jan 2023). The study collected radar data from Sentinel-1 and performed PSInSAR analysis. The preliminary analysis revealed continuous deformation of the order of 4cm/year in the region. Specific locations were selected for further detailed analysis, and field work is being carried out to provide additional information such as the effects of subsidence and vulnerability of the area. This information can be used to develop a comprehensive understanding of the subsidence problem in Joshimath, which is critical for developing effective mitigation strategies.