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  Hydrological induced surface deformation in Ganga basin India, derived from the space geodetic observations

More, S., Tiwari, V. M., Muppidi, R. (2023): Hydrological induced surface deformation in Ganga basin India, derived from the space geodetic observations, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4021

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 Urheber:
More, Shivprasad1, Autor
Tiwari, Virendra Mani1, Autor
Muppidi, Ravikumar1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Zusammenfassung: Groundwater is increasingly prioritizing sustaining agricultural, industrial, and domestic activities in many arid and semiarid regions globally, including India. In recent years, stresses on groundwater resources have been increasing due to economic development and population growth. Therefore, it is essential to monitor groundwater levels and storage in order to assess its potential and long-term sustainability. The capability and demand of Space Geodetic Observation in hydrology and water resources has grown in the past decades. In this study, we examine based on Space Geodetic Observations like Gravity Recovery and Climate Experiment (GRACE), Global Positing System (GPS), and Interferometric Synthetic Aperture Radar (InSAR) to study deformation due to hydrological loading effects in the Ganga basin India. The Ganga basin is one of the largest agricultural regions in the world and is experiencing groundwater depletion, as GRACE and GRACE-FO satellites observed on a regional scale with limited spatial resolution. Groundwater depletion causes surface deformation due to the over-extraction of groundwater from the aquifer system. However, understanding the relationship between changes in groundwater volumes and ground deformation has proven difficult. In the current study, we used surface displacement measurements from InSAR and terrestrial water storage from GRACE, GRACE-FO, and GPS data, which can provide continuous measurements at station locations to characterize the hydrological dynamics within the Ganga Basin. The deformation derived from InSAR agreed well with in-situ observations of groundwater level data and vertical deformation observed at GPS stations, indicating that the most subsidence occurs in areas with high groundwater demand and dense population.

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Sprache(n): eng - Englisch
 Datum: 2023-07-112023-07-11
 Publikationsstatus: Final veröffentlicht
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 Identifikatoren: DOI: 10.57757/IUGG23-4021
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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
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Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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