Journal Article

FZJ-2019-03890

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Groundwater age dating in fractured rock using 4 He data

Trinchero, P. (Corresponding author) ; Sidborn, M. ; Puigdomenech, I. ; Iraola, A. ; Bosbach, D.FZJ* ; Deissmann, G.FZJ*

2019
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/23243  doi:10.1016/j.hydroa.2019.100036

Abstract: Using environmental tracers to date groundwater age in fractured systems is difficult since mass exchange processes between fractures and matrix might mask the actual distribution of groundwater velocity, thus leading to biased results. Here, we propose an analytical solution to date groundwater age in fractured media using data. The solution, which is an extension of existing solutions based on linear accumulation methods, decouples the transport equation in the flowing fracture from the diffusion equation in the rock matrix, under the assumption of steady-state conditions. In the proposed analytical solution groundwater age and concentration are linearly related, and the bulk production rate in matrix, scaled by the inverse of fracture volume fraction, is the proportionality constant. This scaling factor accounts for the underlying mass exchange processes between fracture and rock matrix. Moreover, an Equivalent Continuous Porous Medium (ECPM)-based formulation for the numerical assessment of steady-state levels in fractured media is presented and used to test the performance of the proposed dating technique in realistic conditions.

Note: Journal of Hydrology X

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Contributing Institute(s):

1. Nukleare Entsorgung und Reaktorsicherheit (IEK-6)
2. JARA - HPC (JARA-HPC)

Research Program(s):

1. 161 - Nuclear Waste Management (POF3-161) (POF3-161)
2. Understanding coupled reactive transport in fractured crystalline rocks at sub-millimeter scale (jiek63_20141101) (jiek63_20141101)

Appears in the scientific report 2019

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Database coverage:
; ; ; BIOSIS Previews ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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