Author(s): C. Tzimopoulos, M. Sakellariou Makrantonaki,
A. Spiridis & G. Arampatzis
A special algorithm is developed to optimize the function of van Genuchten,
which is used for the simulation of the soil characteristic curve.
This function is
non-linear so the method of conjugate directions is used.
A start point and a
gradient are chosen and the next point is found by the optimum step size
The selected directions for the solution are found using the
property of conjugate gradients and each direction is a function of the present
and the last gradient.
The unsaturated state of the soil is described by the soil water content 9
(crnVcm^) and the pore water pressure (suction) W (cm).
Size: 514 kb
Paper DOI: 10.2495/CMWR980291
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