Groundwater quality in the alluvial aquifer system of northwest India: New evidence of the extent of anthropogenic and geogenic contamination

The Science of the Total Environment
D J LapworthM S Rao

Abstract

Groundwater depletion has been widely studied in northwest India, but water quality concerns are still poorly constrained. In this study, we explore the hydrochemistry of the top 160m of the aquifer system, through detailed field studies in the Bist-Doab region, considering both anthropogenic and geogenic controls. A detailed comparison is made between sites dominated by urban and agricultural landuse. Salinity, nitrate, chloride and lead concentrations are significantly higher in the shallow (0-50m) groundwater system due to surface anthropogenic contaminant loading from agricultural and urban sources. The widespread occurrence of oxic groundwater within the aquifer system means that denitrification potential is limited and also enhances the mobility of selenium and uranium in groundwater. Geogenic trace elements (e.g. As, Se, F), are generally found at concentrations below WHO guideline drinking water values, however elevated U concentrations (50-70μg/L) are found within the deeper part of the aquifer and shallow urban aquifers associated with higher bicarbonate waters. Higher concentration of Se (10-40μg/L) are found exclusively in the shallow groundwater system where Se is mobilised from soils and transported to depth in th...Continue Reading

Citations

Jun 14, 2018·Environmental Monitoring and Assessment·Jonatas Batista MattosElinaldo Fonseca Sales
Feb 7, 2020·Environmental Monitoring and Assessment·Md Ali AkberMd Atikul Islam
Jun 28, 2018·Environmental Science and Pollution Research International·Chetan P S Ahada, Surindra Suthar
Dec 5, 2018·Journal of Environmental Quality·Shrutika L WadgaonkarPiet N L Lens
Aug 21, 2020·Environmental Science and Pollution Research International·Chengcheng LiJochen Bundschuh
Jan 4, 2021·Archives of Environmental Contamination and Toxicology·Tirumalesh KeesariS K Jain
May 6, 2021·Heliyon·George LutterodtMohammed Takase
Jun 1, 2021·Geochimica Et Cosmochimica Acta·Anand KumarAlexander van Geen
Jun 13, 2021·Journal of Contaminant Hydrology·Ana Emília Carvalho de Gusmão da Cunha RabeloAntonio Celso Dantas Antonino
Jul 30, 2021·The Science of the Total Environment·Gopal KrishanRajesh Vasisht
Dec 17, 2021·The Science of the Total Environment·D J LapworthP L Smedley

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