Article (Scientific journals)
Monitoring groundwater fluxes variations through active-DTS measurements
Simon, Nataline; Bour, Olivier; Lavenant, Nicolas et al.
2023In Journal of Hydrology, 622, p. 129755
Peer Reviewed verified by ORBi
 

Files


Full Text
1-s2.0-S0022169423006972-main.pdf
Publisher postprint (3.34 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Active-DTS; Groundwater dynamics; Groundwater flow monitoring; Heat tracer experiment; Heated Fiber Optic Cable; Active-distributed temperature sensing; Distributed temperature sensing; Fiberoptic cables; Fibre-optic cables; Flow monitoring; Heated fiber optic cable; Tracer experiment; Water Science and Technology
Abstract :
[en] Considering the need of characterizing temporal dynamic of groundwater and the lack of available methods, we investigate the feasibility of active-Distributed Temperature Sensing (DTS) measurements to monitor and quantify groundwater fluxes variations over time. Active-DTS, which consists here of heating a Fiber Optic (FO) cable and in monitoring the temperature elevation, has proven to be very efficient to quantify the spatial distribution of groundwater fluxes in saturated porous media at high resolution with low uncertainties. However, the approach has never been tested to continuously monitor groundwater fluxes changes. To test this, we rely on both numerical simulations and sandbox experiments to assess the sensitivity of temperature elevation to variable flow conditions and our ability to interpret associated temperature variations. Results confirm that the temperature elevation and evolution over time is sensitive to flow conditions and that associated temperature variations can be used to characterize groundwater fluxes variations. First, experimental and numerical results show that when a flow change is followed by a long-enough steady-state flow period the temperature stabilizes independently of previous fluxes conditions. In such case, the stabilization temperature can easily be interpreted to estimate groundwater fluxes using the analytical model commonly used under steady flow conditions to interpret active-DTS measurements. Furthermore, we demonstrate here that, under certain flow conditions depending on the nature of flow variations, the approach offers the possibility of continuously monitoring fluxes variations. For instantaneous flow changes, it is even possible to go further by reproducing temperature signal variations over time by applying the superposition principle to the analytical model. In the end, these preliminary tests are particularly promising and open new perspectives for monitoring and/or quantifying the temporal dynamic of groundwater fluxes at different temporal scales including diurnal and short-term periodic fluxes variations.
Disciplines :
Earth sciences & physical geography
Geological, petroleum & mining engineering
Author, co-author :
Simon, Nataline  ;  Université de Liège - ULiège > Urban and Environmental Engineering  ; Univ Rennes, CNRS, Géosciences Rennes – UMR 6118, Rennes, France
Bour, Olivier ;  Univ Rennes, CNRS, Géosciences Rennes – UMR 6118, Rennes, France
Lavenant, Nicolas;  Univ Rennes, CNRS, Géosciences Rennes – UMR 6118, Rennes, France
Porel, Gilles ;  Department of Earth Sciences, IC2MP UMR 7285, Université de Poitiers, CNRS, HydrASA, Poitiers, France
Nauleau, Benoît;  Department of Earth Sciences, IC2MP UMR 7285, Université de Poitiers, CNRS, HydrASA, Poitiers, France
Klepikova, Maria;  Univ Rennes, CNRS, Géosciences Rennes – UMR 6118, Rennes, France
Language :
English
Title :
Monitoring groundwater fluxes variations through active-DTS measurements
Publication date :
2023
Journal title :
Journal of Hydrology
ISSN :
0022-1694
eISSN :
1879-2707
Publisher :
Elsevier B.V.
Volume :
622
Pages :
129755
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ANR - Agence Nationale de la Recherche
INSU - Institut National des Sciences de l'Univers
AELB - Agence de l'eau Loire-Bretagne
Funding text :
The experimentation and the collaboration between the University of Rennes 1 and the University of Poitiers benefited from the support of INSU-CNRS through the Service National d'Observation H+. We thank Denis Paquet for helping us during the experimental work and Annick Battais for the computing support she provided.This work was supported by the Agence de l\u2019Eau Loire Bretagne and by the ANR project EQUIPEX CRITEX grant number ANR-11-EQPX-0011.
Available on ORBi :
since 07 April 2026

Statistics


Number of views
31 (0 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
13
Scopus citations®
without self-citations
11
OpenAlex citations
 
12

Bibliography


Similar publications



Contact ORBi