Paper published in a book (Scientific congresses and symposiums)
Measured and computed solute transport behaviour in the saturated zone of a fractured and slightly karstified chalk aquifer
Dassargues, Alain; Goderniaux, Pascal; Daoudi, Moubarak et al.
2011In Bertrand, C.; Carry, N.; Mudry, J. et al. (Eds.) Proc. H2Karst, 9th Conference on Limestone Hydrogeology
Peer reviewed
 

Files


Full Text
Publi212ADlh2karst2011.pdf
Publisher postprint (944.43 kB)
Download
Annexes
ModTracertTest_H2Karst_AD.pdf
Publisher postprint (776.4 kB)
Pdf copy of the presented paper
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
groundwater; modelling; tracer tests; solute transport; chalk aquifer; fractured aquifer; discrete approach; REV approach; karstified chalk
Abstract :
[en] Solute transport in the saturated zone of a micro-fissured, fractured and even locally slightly karstified aquifer has been studied by multi-tracer tests in groundwater convergent flow conditions to pumping wells or towards a collecting gallery. Different behaviour has been detected that can be described by three kinds of typical breakthrough curves: (a) transport with a dominant advective component, producing narrow and symmetrical observed breakthrough curves, characteristic of solute transport in open fractures or conduits; (b) transport with significant advective and dispersive components exhibiting more spread-out breakthrough curves, with also non-symmetrical trends caused by retardation effects; (c) transport with a dominant dispersive component, showing mostly a flat breakthrough curve where dispersion and possible immobile water effects are difficult to be separated. These results were synthesized from thirty-five injections of tracers, distributed between 11 sites. Groundwater flow and solute transport are simulated and illustrated here for one example, employing the finite element code HYDROGEOSPHERE, and using two ways for representing the fracture zones: highly contrasting hydraulic conductivity zones with a classical REV approach and discrete fractures combined with a porous medium by the use of a dual approach. Results are particularly illustrative to show that detailed parameterization and calibration of such a local situation remain difficult even on the basis of an extensive data sets from many tracer tests.
Research center :
Aquapôle - ULiège
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Dassargues, Alain  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement
Goderniaux, Pascal ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement
Daoudi, Moubarak
Orban, Philippe  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement
Language :
English
Title :
Measured and computed solute transport behaviour in the saturated zone of a fractured and slightly karstified chalk aquifer
Publication date :
September 2011
Event name :
H2Karst, 9th Conference on Limestone Hydrogeology
Event organizer :
Université de Franche-Comté - Université de Neuchâtel (CH)
Event place :
Besançon, France
Event date :
1-4 sep.2011
Audience :
International
Main work title :
Proc. H2Karst, 9th Conference on Limestone Hydrogeology
Editor :
Bertrand, C.
Carry, N.
Mudry, J.
Pronk, M.
Zwahlen, F.
Pages :
111-114
Peer reviewed :
Peer reviewed
Available on ORBi :
since 03 October 2011

Statistics


Number of views
107 (12 by ULiège)
Number of downloads
532 (8 by ULiège)

Bibliography


Similar publications



Contact ORBi