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Isotope hydrogeochemical models for assessing the hydrological processes in a part of the largest continental flood basalts province of India

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Geoscience Frontiers 2022年第2期13卷 200-213页

作者： Md.Arzoo Ansari Jacob Noble Archana Deodhar u.saravana kumar Isotope and Radiation Application Division Bhabha Atomic Research CentreTrombayMumbai 400085India Isotope Hydrology Section Division of Physical and Chemical SciencesInternational Atomic Energy Agency(IAEA)ViennaAustria

Continental Flood Basalts(CFB)occupy one fourth of the world’s land ***,it is important to discern the hydrological processes in this complex hydrogeological setup for the sustainable water resources development.A model assisted isotope,geochemical,geospatial and geophysical study was conducted to understand the monsoonal characteristics,recharge processes,renewability and geochemical evolution in one of the largest continental flood basalt provinces of *** modelling and stable isotopes were used to assess the monsoonal *** distillation model were used to understand the climatic conditions at the time of groundwater *** parameter models(LPM)were employed to quantify the mean transit time(MTT)of *** and geochemical models were adopted to understand the geochemical evolution along the groundwater flow path.A geophysical model was used to understand the geometry of the *** back trajectory analysis confirms the isotopic finding that precipitation in this region is caused by orographic uplifting of air masses originating from the Arabian *** isotopic data of groundwater showed its meteoric origin and two recharge processes were discerned;(i)quick and direct recharge by precipitation through fractured and weathered basalt,(ii)low infiltration through the clayey black cotton soil and subjected to evaporation prior to the *** data showed that the groundwater is a renewable source and have shorter transit times(from present day toudy indicated multiple sources/processes such as:the minerals dissolution,silicate weathering,ion exchange,anthropogenic influences *** the chemistry of the *** on the geo-electrical resistivity survey,the potential zones(weathered and fractured)were delineated for the groundwater ***,the study highlights the usefulness of model assisted isotopic hydrogeochemical techniques for underst

关键词： Stable isotopes Groundwater recharge Hydrological processes Modelling Deccan Traps

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