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Hydrogeochemical zonation for groundwater management in the area with diversified geological and land-use setup
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
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2013 (English)In: Chemie der Erde, ISSN 0009-2819, E-ISSN 1611-5864, Vol. 73, no 3, 267-274 p.Article in journal (Refereed) Published
Abstract [en]

Despite its limited aerial extent, the National Capital Territory (NCT) Delhi, India, has diversified geological and topographical setup. A geochemical assessment of prevailing conditions of aquifer underlying the NCT was attempted and further classified into different hydrogeochemical zones on the basis of statistical and analyses and its correlation with land use, geological and climatic setting. Mineral phase study and isotopic analyses were used for the verification of performed clustering. Saturation indices (SI) calculated using the geochemical modelling code PHREEQC were used to distinguish the characteristics of four zones, as saturation states of the water does not change abruptly. Four different hydrogeochemical zones were statistically identified in the area: (1) intermediate (land-use-change-impacted) recharge zone, (2) discharge (agriculture-impacted) zone, (3) recharge (ridge) zone, and (4) recharge floodplain (untreated-discharge-impacted) zone. The distinctiveness of hydro-geochemical zones was further verified using stable isotopic (H-2 and O-18) signature of these waters. GIS-based flow regime in association with long-term geochemical evidences implied that these zones are being affected by different problems; thus, it necessitates separate environmental measures for their management and conservation. The study suggested that in a diversified urban setup where the complex interactions between anthropogenic activities and normal geochemical processes are functioning, hydrogeochmical zoning based on the integration of various techniques could be the first step towards sketching out the groundwater management plan.

Place, publisher, year, edition, pages
2013. Vol. 73, no 3, 267-274 p.
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Geochemistry
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URN: urn:nbn:se:uu:diva-210908DOI: 10.1016/j.chemer.2013.06.004ISI: 000327229400004OAI: oai:DiVA.org:uu-210908DiVA: diva2:664741
Available from: 2013-11-16 Created: 2013-11-16 Last updated: 2017-12-06Bibliographically approved

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Herbert, Roger

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