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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
20 Jun 2016
Review status
A revision of this discussion paper was accepted for the journal Hydrology and Earth System Sciences (HESS) and is expected to appear here in due course.
Hydraulic and transport parameter assessment using column infiltration experiments
A. Younes1,2,3, T. A. Mara4, M. Fahs1, O. Grunenberger2, and Ph. Ackerer1 1HyGES, Université de Strasbourg/EOST, CNRS, 1 rue Blessig, 67084 Strasbourg, France
2IRD UMR LISAH, F-92761 Montpellier, France
3LMHE, Ecole Nationale d’Ingénieurs de Tunis, Tunisie
4Université de La Réunion, PIMENT, 15 Avenue René Cassin, BP 7151, 97715 Moufia, La Réunion
Abstract. In the present work, we study the quality of the statistical calibration of hydraulic and transport soil properties using an infiltration experiment in which, over a given period, tracer-contaminated water is injected into a laboratory column filled with a homogeneous soil. The numerical model is based on the Richards' equation for solving water flow and the advection-dispersion equation for solving solute transport. Several state variables (e.g., water content, solute concentration, pressure head) are measured during the experiment. Statistical calibration of the computer model is then carried out for different data sets and injection scenarios with the DREAM(ZS) Markov Chain Monte Carlo sampler. The results show that the injection period has a significant effect on the quality of the estimation, in particular, the posterior uncertainty range. The hydraulic and transport parameters of the investigated soil can be estimated from the infiltration experiment using the concentration and cumulative outflow, which are measured non-intrusively. A significant improvement of the identifiability of the parameters is observed when the pressure data from measurements taken inside the column are also considered in the inversion.

Citation: Younes, A., Mara, T. A., Fahs, M., Grunenberger, O., and Ackerer, Ph.: Hydraulic and transport parameter assessment using column infiltration experiments, Hydrol. Earth Syst. Sci. Discuss., doi:10.5194/hess-2016-295, in review, 2016.
A. Younes et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC1: 'Hydraulic and transport parameter assessment using column infiltration experiments', Anonymous Referee #1, 16 Aug 2016 Printer-friendly Version 
AC1: 'Reply to reviewer 1', Philippe Ackerer, 29 Sep 2016 Printer-friendly Version Supplement 
RC2: 'review', Anonymous Referee #2, 29 Aug 2016 Printer-friendly Version 
AC2: 'Reply to reviewer 2', Philippe Ackerer, 29 Sep 2016 Printer-friendly Version Supplement 
A. Younes et al.
A. Younes et al.


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