Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/hess-2016-295
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
20 Jun 2016
Review status
This discussion paper is under review for the journal Hydrology and Earth System Sciences (HESS).
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.
A. Younes et al.
A. Younes et al.

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