NDLI: Investigation on the hydrodynamics of Ganga Alluvial Plain using environmental isotopes: a case study of the Gomati River Basin, northern India

Content Provider	Springer Nature Link
Author	Singh, Munendra Kumar, Sudhir Kumar, Bhishm Singh, Sandeep Singh, Indra Bir
Copyright Year	2013
Abstract	An investigation using environmental isotopes (δ$^{18}$O and δD) was conducted to gain insight into the hydrological processes of the Ganga Alluvial Plain, northern India. River-water, shallow-groundwater and lake-water samples from the Gomati River Basin were analyzed. During the winter season, the δ$^{18}$O and δD compositions of the Gomati River water ranged from −1.67 to −7.62 ‰ and −25.08 to −61.50 ‰, respectively. Deuterium excess values in the river water (+0.3 to −13 ‰) and the lake water (−20 ‰) indicate the significance of evaporation processes. Monthly variation of δ$^{18}$O and δD values of the Gomati River water and the shallow groundwater follows a similar trend, with isotope-depleted peaks for δ$^{18}$O and δD synchronized during the monsoon season. The isotopically depleted peak values of the river water (δ$^{18}$O = −8.30 ‰ and δD = −57.10 ‰) can be used as a proxy record for the isotopic signature of the monsoon precipitation in the Ganga Alluvial Plain.Une étude faisant appel aux isotopes présents dans l’environnement (δ$^{18}$O and δD) a été conduite dans le but de parvenir à bien comprendre le fonctionnement hydraulique de la Plaine Alluviale du Gange, Inde du Nord. Des échantillons de l’eau de la rivière, de la nappe superficielle et du lac ont été analysés dans le Bassin de la Rivière Gomati. Pendant l’hiver, les concentrations du δ$^{18}$O et du δD dans l’eau de la Rivière Gomati s’échelonnent respectivement entre −1.67 et −7.62 ‰ et entre −25.08 et −61.50 ‰. Les valeurs extrèmes du deuterium dans l’eau de la rivière (+0.3 à −13 ‰) et dans l’eau du lac (−20 ‰) révèlent l’importance des phénomènes d’évaporation. La variation mensuelle de δ$^{18}$O et δD dans l’eau de la Rivière Gomati et dans l’eau de la nappe superficielle suit une même tendance, avec des pics isotopiques moins prononcés synchronisés pour δ$^{18}$O et δD pendant la mousson. Les valeurs réduites du pic isotopique de l’eau de la rivière (δ$^{18}$O = −8.30 ‰ et δD = −57.10 ‰) peuvent être utilisées comme données de substitution à la signature isotopique des précipitations de mousson dans la Plaine Alluviale du Gange.Um Einblick in die hydrologischen Prozesse des Ganges-Schwemmebene (Nordindien) zu gewinnen, wurden Untersuchungen mittels der Umweltisotope δ$^{18}$O und δD durchgeführt. Flusswasser, oberflächennahes Grundwasser und Binnenseewasser vom Gomati-Flussbecken wurden dazu untersucht. Das Flusswasser des Gomati zeigt während der Winterzeit Schwankungen der δ$^{18}$O-Werte zwischen −1.67 bis −7.62 % und der δD Werte zwischen −25.08 und −61.50 ‰. Überwerte3) von Deuterium im Flusswasser (+0.3 bis −13 ‰) und dem Binnenseewasser (−20 ‰) zeigen die Bedeutung von Verdunstungsprozessen an. Die monatlichen Schwankungen der δ$^{18}$O- und δD-Werte im Flusswasser des Gomati und des oberflächennahen Grundwassers zeigen mit an Isotop abgereicherte Spitzen für δ$^{18}$O und δD eine ähnliche Tendenz und verlaufen synchron1) mit der Monsunzeit. Die an Isotopen abgereicherten Maximalwerte des Flusswassers (δ$^{18}$O = −8.30 ‰, und δD = −57.10 ‰) können als Aufzeichnung2) für die Isotopen-Zusammensetzung des Monsun-Niederschlags in der Ganges-Schwemmebene verwendet werden.Se realizó una investigación usando isótopos ambientales (δ$^{18}$O y δD) para conocer los procesos hidrológicos de la planicie aluvial de Ganga, norte de la India. Se analizaron muestras del agua del río, del agua subterránea somera y del agua del lago en la cuenca del Río Gomati. Durante la estación invernal, las composiciones de δ$^{18}$O y δD en el agua de río Gomati varía de −1.67 a −7.62 ‰ y de −25.08 a −61.50 ‰, respectivamente. Los valores en exceso de Deuterio en el agua del río (+0.3 a −13 ‰) y en el agua del lago (−20 ‰) indican la significación de los procesos de evapotranspiración. La variación mensual de los valores de δ$^{18}$O y δD en el agua del Río Gomati y en el agua subterránea somera sigue una tendencia similar, con picos de isótopos empobrecidos para δ$^{18}$O y δD sincronizados durante la estación monzónica. Los valores de picos empobrecidos isotópicamente del agua de río (δ$^{18}$O = −8.30 ‰ y δD = −57.10 ‰) pueden ser usado como un proxy de registro para la firma isotópica de la precipitación monzónica en la planicie aluvial de Ganga.Foi realizada uma investigação com isótopos ambientais (δ$^{18}$O e δD) para o estudo dos processos hidrológicos que ocorrem na Planície Aluvial do Rio Ganges, no norte da Índia. Foram analisadas amostras de água do rio, de águas subterrâneas pouco profundas e de água de lago, provenientes da Bacia Hidrográfica do Rio Gomati. Durante a estação de inverno, a composição em δ$^{18}$O e δD da água do Rio Gomati variou entre −1.67 e −7.62 ‰ e −25.08 e −61.50 ‰, respetivamente. O excesso nos valores de Deutério na água do rio (+0.3 a −13 ‰) e na água do lago (−20 ‰) indicam que os processos de evaporação são significativos. A variação mensal dos valores de δ$^{18}$O e δD da água do Rio Gomati e da água subterrânea pouco profunda segue uma tendência similar, com picos de depleção de isótopos de δ$^{18}$O e δD sincronizados durante a estação das monções. Os valores dos picos de depleção isotópica da água do rio (δ$^{18}$O = −8.30 ‰ e δD = −57.10 ‰) podem ser usados como indicadores para a assinatura isotópica da precipitação da monção na Planície Aluvial do Ganges.
Starting Page	687
Ending Page	700
Page Count	14
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	21
Issue Number	3
e-ISSN	14350157
Language	Portuguese
Publisher	Springer-Verlag
Publisher Date	2013-02-15
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environmental isotopes Groundwater/surface-water relations Gomati River Basin Monsoon India Hydrogeology Hydrology/Water Resources Geology Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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