What can be learnt about dispersivity from transport experiments in unsaturated double-porosity soils?
T.D. Tran Ngoc, Azita Ahmadi, Henri Bertin
Dans les comptes rendus d’articles de la conférence: GeoOttawa 2017: 70th Canadian Geotechnical Conference; 12th joint with IAH-CNCSession: General Hydrogeology III
ABSTRACT: Dispersivity is assumed to be an intrinsic property which characterizes the heterogeneity scale of porous media. When -local pore size characteristics is observed. In this work, we revisited the intrinsicity of the dispersivity of a double-porosity soil with different saturations, by performing a series of one-dimensional experiments of chloride tracer dispersion under different boundary conditions. The physical double-porosity model was composed of solidified clayey balls, distributed periodically in a more permeable sandy matrix. The dependence of the dispersivity on the saturation in the double-porosity soil was established and compared with the trends obtained for the single-porosity soils in previous studies. R a milieux poreux. Lorsque le milieu est sapar deux phases fluides (eau et air), elle Le concept - lesquels on observe un fort contraste de tailles iques locales de pores. Dans ce travail, nous la , traceur, pour de sable de la saturation dans le sol avec les simple-
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T.D. Tran Ngoc; Azita Ahmadi; Henri Bertin (2017) What can be learnt about dispersivity from transport experiments in unsaturated double-porosity soils? in GEO2017. Ottawa, Ontario: Canadian Geotechnical Society.
@article{geo2017Paper223,author = T.D. Tran Ngoc; Azita Ahmadi; Henri Bertin,title = What can be learnt about dispersivity from transport experiments in unsaturated double-porosity soils?,year = 2017}