Estimation of Groundwater Residence Time Using Radiocarbon and Stable Isotope Ratio in Dissolved Inorganic Carbon and Soil CO 2

Estimation of residence time of groundwater, particularly in regions with inadequate surface waters are very important for formulating sustainable groundwater management policies. We developed a technique for extracting dissolved inorganic carbon (DIC) quantitatively from water for measuring its 14 C contents and presented the analytical details here. We also measured stable carbon isotope ratio (δ 13 C) in soil CO 2 and groundwater DIC to correct the groundwater 14 C ages. In addition, 14 C in soil CO 2 were measured for making necessary correction in the initial activity of the recharging water. The corrected 14 C contents in the groundwater samples were used to estimate their residence times employing Lumped Parameter Models (LPM), a set of mathematical models to account for the processes that take place during transport from the recharge to the sampling spots. We present a case study focused on the calculation of radiocarbon ages and residence times for a groundwater sample collected from the campus of Physical Research Laboratory in Ahmedabad, Gujarat, India. The study also includes estimations of groundwater residence times using previously measured 14 C ages of groundwater samples from Gujarat, India. Various factors controlling the groundwater ages in the LPM and their applicability are discussed

Aquifer · Carbon fibers · Dissolved organic carbon · Groundwater · Groundwater recharge · Radiocarbon dating · Residence · Soil water · Stable isotope ratio · Environmental Science · Groundwater and Isotope Geochemistry · Groundwater flow and contamination studies · Hydrocarbon exploration and reservoir analysis · Mathematics · Geology · Soil Science

• Stable isotopes in tree rings

  Open Access•Danny McCarroll, Neil J Loader•Quaternary Science Reviews•2004

  Añadir item

• Carbon isotope compositions of terrestrial C3 plants as indicators of (paleo)ecology and (paleo)climate

  Open Access•Matthew J Kohn•Proceedings of the National…•2010

  Añadir item

• Paleoclimate and paleovegetation of Lower Narmada Basin, Gujarat, Western India, inferred from stable carbon and oxygen isotopes

  Open Access•A H Laskar, N Sharma et al.•Quaternary International•2010

  Añadir item

• Late-Holocene climate in the Lower Narmada valley, Gujarat, western India, inferred using sedimentary carbon and oxygen isotope ratios

  Open Access•AH Laskar, M G Yadava et al.•The Holocene•2013

  Añadir item

• Dissolved Inorganic Radiocarbon in the Northwest Pacific Continental Margin

  Open Access•Tiantian Ge, Xuchen Wang et al.•Radiocarbon•2016

  Añadir item

• Distribution of Gaseous 12 CO 2 , 13 CO 2 , and 14 CO 2 in the Sub-Soil Unsaturated Zone of the Western US Great Plains

  Open Access•D C Thorstenson, E P Weeks et al.•Radiocarbon•1983

  Añadir item

• Extraction of Dissolved Inorganic Carbon (DIC) from Seawater Samples at Cedad

  M Macchia, M D'Elia et al.•Radiocarbon•2013

  Añadir item

• An Overview of 14 C Analysis in the Study of Groundwater

  Open Access•Mebus A Geyh•Radiocarbon•2000

  Añadir item

• Radiocarbon and Stable Carbon Isotopes in Two Soil Profiles from Northeast India

  Open Access•Amzad H Laskar, M G Yadava et al.•Radiocarbon•2012

  Añadir item

• Production of Graphite Targets by Deposition from CO/H 2 for Precision Accelerator 14 C Measurements

  Open Access•A J T Jull, D J Donahue et al.•Radiocarbon•1986

  Añadir item

• Quantitative Extraction of Dissolved Inorganic Carbon (as CO 2 ) and Water by Vacuum Distillation from Sediments of the Unsaturated Zone for Carbon Isotope Analysis ( 13 C and 14 C)

  Open Access•I Carmi, J Kronfeld et al.•Radiocarbon•2007

  Añadir item

• Discussion Reporting of 14 C Data

  Open Access•Minze Stuiver, Henry A Polach•Radiocarbon•1977

  Añadir item

• A Simple Co 2 Extraction Method for Radiocarbon Analyses of Dissolved Inorganic Carbon in Water Samples Without a Carrier Gas

  Open Access•Hiroshi A Takahashi, Hiroko Handa et al.•Radiocarbon•2021

  Añadir item

• SHCal20 Southern Hemisphere Calibration, 0–55,000 Years cal BP

  Open Access•Angela Hogg, Timothy J Heaton et al.•Radiocarbon•2020

  Añadir item

• CO 2 and 14 CO 2 Measurements on Soil Atmosphere Sampled in the Sub-Surface Unsaturated Zone in the Western Great Plains of the US

  Open Access•Herbert Haas, D W Fisher et al.•Radiocarbon•1983

  Añadir item

• The IntCal20 Northern Hemisphere Radiocarbon Age Calibration Curve (0–55 cal kBP)

  Open Access•Paula J Reimer, William E N Austin et al.•Radiocarbon•2020

  Añadir item