Vereecken, H. [P:(DE-Juel1)129549] ; Weynants, M. [P:(DE-HGF)0] ; Javaux, M. [P:(DE-Juel1)129477] ; Pachepsky, Y. [P:(DE-HGF)0] ; Schaap, M.G. [P:(DE-HGF)0] ; van Genuchten, M.Th. [P:(DE-HGF)0]