Author(s)

G. Nutzmann, H. Moser & K. Joswig

Abstract

Several experimental methods are employed to determine effective hydraulic functions of an unsaturated homogeneous sand. Classical one-step outflow and evaporation experiments were carried out on small soil columns, and a modified one-step outflow method was employed on a column with 150 cm length and a saturated-unsaturated water flow. Hydraulic properties of the quarz sand are assumed to be represented by van Genuchten's closed-form expressions, the parameters a and n given by this expressions are evaluated with an inverse optimization procedure. Only the large column experiment results allow to draw conclusions from parame

Keywords