PC-Progress Discussion Forums

Hello,
I am searching for the documentation of the log-normal distribution retention model / Mualem conductivity implemented in RETC . In the manual of 1991 (van Genuchten et al.) the model is not yet included.
I will be grateful for any hint for where to find the equations beyond the model.

Thank you
Kind regards,
Beate

You can find the details in the original paper of Kosugi (1996):

Kosugi K., Lognormal distribution model for unsaturated soil hydraulic properties, Water Resour. Res., 32(9), 2697-2703, 1996.

or in the manual of Hydrus-1D (where you can find detailed description of all models implemented in RETC and Hydrus).

Jirka