GPS measurement of land subsidence in Gandhinagar,Gujarat (Western India), due to groundwater depletion |
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| Authors: | Pallabee Choudhury Kalpna Gahalaut Rakesh Dumka V K Gahalaut Abhay Kumar Singh Sanjay Kumar |
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| Institution: | 1.Institute of Seismological Research,Gandhinagar,India;2.CSIR-National Geophysical Research Institute,Hyderabad,India;3.National Center for Seismology, Ministry of Earth Sciences,New Delhi,India;4.Department of Physics,Banaras Hindu University,Varanasi,India |
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| Abstract: | A continuous GPS measurement site, ISRR, at Gandhinagar (Western India), documented ~?5 mm/year of surface subsidence rate during 2009–2016. Preliminary modelling using an analytical solution indicates that the observed surface subsidence rate at the ISRR site is consistent with the ground water depletion reported from Gandhinagar. An assessment of data from GPS sites at Lucknow and Varanasi in the Indo-Gangetic plains in Northern India does not indicate any significant subsidence at these sites which is also consistent with the in situ observations of insignificant depletion of ground water in the region. |
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