Imperial College London
Professor Sanjeev Gupta

ProfessorSanjeevGupta

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Earth Science
 
 
 
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Contact

 

+44 (0)20 7594 6527s.gupta

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Joshi:2018:10.1016/j.jhydrol.2018.02.056,
author = {Joshi, SK and Rai, SP and Sinha, R and Gupta, S and Densmore, AL and Rawat, YS and Shekhar, S},
doi = {10.1016/j.jhydrol.2018.02.056},
journal = {Journal of Hydrology},
pages = {835--847},
title = {Tracing groundwater recharge sources in the northwestern Indian alluvial aquifer using water isotopes (δ18O, δ2H and 3H)},
url = {http://dx.doi.org/10.1016/j.jhydrol.2018.02.056},
volume = {559},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Rapid groundwater depletion from the northwestern Indian aquifer system in the western Indo-Gangetic basin has raised serious concerns over the sustainability of groundwater and the livelihoods that depend on it. Sustainable management of this aquifer system requires that we understand the sources and rates of groundwater recharge, however, both these parameters are poorly constrained in this region. Here we analyse the isotopic (δ18O, δ2H and tritium) compositions of groundwater, precipitation, river and canal water to identify the recharge sources, zones of recharge, and groundwater flow in the Ghaggar River basin, which lies between the Himalayan-fed Yamuna and Sutlej River systems in northwestern India. Our results reveal that local precipitation is the main source of groundwater recharge. However, depleted δ18O and δ2H signatures at some sites indicate recharge from canal seepage and irrigation return flow. The spatial variability of δ18O, δ2H, d-excess, and tritium reflects limited lateral connectivity due to the heterogeneous and anisotropic nature of the aquifer system in the study area. The variation of tritium concentration with depth suggests that groundwater above c. 80 mbgl is generally modern water. In contrast, water from below c. 80 mbgl is a mixture of modern and old waters, and indicates longer residence time in comparison to groundwater above c. 80 mbgl. Isotopic signatures of δ18O, δ2H and tritium suggest significant vertical recharge down to a depth of 320 mbgl. The spatial and vertical variations of isotopic signature of groundwater reveal two distinct flow patterns in the aquifer system: (i) local flow (above c.80 mbgl) throughout the study area, and (ii) intermediate and regional flow (below c. 80 mbgl), where water recharges aquifers through large-scale lateral flow as well as vertical infiltration. The understanding of spatial and vertical recharge processes of groundwater in the study area pr
AU  - Joshi,SK
AU  - Rai,SP
AU  - Sinha,R
AU  - Gupta,S
AU  - Densmore,AL
AU  - Rawat,YS
AU  - Shekhar,S
DO  - 10.1016/j.jhydrol.2018.02.056
EP  - 847
PY  - 2018///
SN  - 0022-1694
SP  - 835
TI  - Tracing groundwater recharge sources in the northwestern Indian alluvial aquifer using water isotopes (δ18O, δ2H and 3H)
T2  - Journal of Hydrology
UR  - http://dx.doi.org/10.1016/j.jhydrol.2018.02.056
UR  - http://hdl.handle.net/10044/1/57293
VL  - 559
ER  -
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