Hydrogeochemical evolution and groundwater recharge processes in arsenic enriched area in central Gangetic Plain, India

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cg.coverage.countryIndiaen_US
cg.coverage.iso3166-alpha2INen_US
cg.coverage.regionSouthern Asiaen_US
cg.coverage.subregionGangetic Plainsen_US
cg.coverage.subregionUttar Pradeshen_US
cg.coverage.subregionBallia Districten_US
cg.identifier.doihttps://doi.org/10.1016/j.apgeochem.2021.105044en_US
cg.identifier.iwmilibraryH050479en_US
cg.identifier.urlhttps://vlibrary.iwmi.org/pdf/H050479.pdfen_US
cg.isijournalISI Journalen_US
cg.issn0883-2927en_US
cg.journalApplied Geochemistryen_US
cg.reviewStatusPeer Reviewen_US
cg.volume131en_US
dc.contributor.authorKumar, S.en_US
dc.contributor.authorJoshi, S. K.en_US
dc.contributor.authorPant, N.en_US
dc.contributor.authorSingh, S.en_US
dc.contributor.authorChakravorty, B.en_US
dc.contributor.authorSaini, R. K.en_US
dc.contributor.authorKumar, V.en_US
dc.contributor.authorSingh, A.en_US
dc.contributor.authorGhosh, N.C.en_US
dc.contributor.authorMukherjee, A.en_US
dc.contributor.authorRai, P.en_US
dc.contributor.authorSingh, V.en_US
dc.date.accessioned2021-09-30T09:18:01Zen_US
dc.date.available2021-09-30T09:18:01Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/115263en_US
dc.titleHydrogeochemical evolution and groundwater recharge processes in arsenic enriched area in central Gangetic Plain, Indiaen_US
dcterms.abstractThe present study dealt with understanding hydrogeochemical evolution, ascertaining distribution, fate and spatio-temporal variation of arsenic along with comprehending recharge processes and quantification of recharge rate in the central Gangetic plain, India. The arsenic enriched area was observed mostly in the fluvial deposits with younger alluvium. The depth to water levels maps for 1996 and 2016 showed marked spatio-temporal variation and the groundwater recharge rate was estimated to be varied between 0.05 m/year and 0.07 m/year in the study area. The elevated arsenic concentration was noticed in the region, having declined groundwater recharge. A total of 147 water samples were collected from hand pumps (n = 141) and rivers (n = 6) during the pre-monsoon period (May 2016). In addition, about 81 groundwater samples were collected from 27 locations during the pre-monsoon, monsoon and winter 2019 for studying seasonal variability in the hydrogeochemical parameters and isotopic composition of water. Arsenic concentration was found more in the area where deposits of coarser sediment of the Quaternary period was present along the rivers Ganga and Ghaghra. The arsenic concentration was observed higher in the pre-monsoon (maxm. As 641 µg/L), followed by the post-monsoon (425 µg/L) and monsoon season (375 µg/L). The depleted isotopic value and higher D-excess values in groundwater suggested active recharge conditions with precipitation as the major source of recharge in the study area. It is hypothesized that rainwater induced oxygenated water into the aquifer by the process of recharge, which may prompted various biogeochemical reactions due to change in redox conditions and endorsed arsenic sorption in the monsoon season. Thereafter, anoxic conditions prevailed in the post-monsoon season, and finally, in the pre-monsoon season, reducing conditions continued and arsenic released at a rapid rate, which was justified with the seasonal variation of arsenic concentration.en_US
dcterms.accessRightsLimited Accessen_US
dcterms.bibliographicCitationKumar, S.; Joshi, S. K.; Pant, N.; Singh, S.; Chakravorty, B.; Saini, R. K.; Kumar, V.; Singh, A.; Ghosh, N. C.; Mukherjee, A.; Rai, P.; Singh, V. 2021. Hydrogeochemical evolution and groundwater recharge processes in arsenic enriched area in central Gangetic Plain, India. Applied Geochemistry, 131:105044. [doi: https://doi.org/10.1016/j.apgeochem.2021.105044]en_US
dcterms.extent131:105044en_US
dcterms.issued2021-08en_US
dcterms.languageenen_US
dcterms.licenseCopyrighted; all rights reserveden_US
dcterms.publisherElsevieren_US
dcterms.subjectgroundwater rechargeen_US
dcterms.subjecthydrologyen_US
dcterms.subjectgeochemistryen_US
dcterms.subjectgroundwater tableen_US
dcterms.subjectarsenicen_US
dcterms.subjectstable isotopesen_US
dcterms.subjectaquifersen_US
dcterms.subjectwater levelen_US
dcterms.subjectweatheringen_US
dcterms.subjectriversen_US
dcterms.subjectpollutionen_US
dcterms.typeJournal Articleen_US

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