Thu Apr 10, F. Flechtner
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Janardhanan, Sreekanth, Nair, Akhilesh S., Indu, J., Pagendam, Dan, and Kaushika, G. S., 2023. Estimation of groundwater storage loss for the Indian Ganga Basin using multiple lines of evidence. Scientific Reports, 13:1797, doi:10.1038/s41598-023-28615-y.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2023NatSR..13.1797J,
author = {{Janardhanan}, Sreekanth and {Nair}, Akhilesh S. and {Indu}, J. and {Pagendam}, Dan and {Kaushika}, G.~S.},
title = "{Estimation of groundwater storage loss for the Indian Ganga Basin using multiple lines of evidence}",
journal = {Scientific Reports},
year = 2023,
month = jan,
volume = {13},
eid = {1797},
pages = {1797},
abstract = "{We used remote sensing data, field observations and numerical
groundwater modelling to investigate long-term groundwater
storage losses in the regional aquifer of the Ganga Basin in
India. This comprised trend analysis for groundwater level
observations from 2851 monitoring bores, groundwater storage
anomaly estimation using GRACE and Global Land Data Assimilation
System (GLDAS) data sets and numerical modelling of long-term
groundwater storage changes underpinned by over 50,000
groundwater level observations and uncertainty analysis. Three
analyses based on different methods consistently informed that
groundwater storage in the aquifer is declining at a significant
rate. Groundwater level trend indicated storage loss in the
range {\ensuremath{-}} 1.1 to {\ensuremath{-}} 3.3 cm
year$^{{\ensuremath{-}}1}$ (median {\ensuremath{-}} 2.6 cm
year$^{{\ensuremath{-}}1}$) while the modelling and GRACE
storage anomaly methods indicated the storage loss in the range
of {\ensuremath{-}} 2.1 to {\ensuremath{-}} 4.5 cm
year$^{{\ensuremath{-}}1}$ (median {\ensuremath{-}} 3.2 cm
year$^{{\ensuremath{-}}1}$) and {\ensuremath{-}} 1.0 to
{\ensuremath{-}} 4.2 cm year$^{{\ensuremath{-}}1}$ (median
{\ensuremath{-}} 1.7 cm year$^{{\ensuremath{-}}1}$)
respectively. Probabilistic modelling analysis also indicated
that the average groundwater storage is declining in all the
major basin states, the highest declining trend being in the
western states of Rajasthan, Haryana and Delhi. While smaller
compared to the western states, average groundwater storage in
states further towards east{\textemdash}Uttar Pradesh, Bihar and
West Bengal within the basin are also declining. Time series of
storage anomalies obtained from the three methods showed similar
trends. Probabilistic storage analysis using the numerical model
vetted by observed trend analysis and GRACE data provides the
opportunity for predictive analysis of storage changes for
future climate and other scenarios.}",
doi = {10.1038/s41598-023-28615-y},
adsurl = {https://ui.adsabs.harvard.edu/abs/2023NatSR..13.1797J},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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