log-normal distribution retention model

A discussion forum for RETC users. RETC is a program which can be used to analyze the soil water retention and hydraulic conductivity functions of unsaturated soils.
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beboehme
Posts: 1
Joined: Mon Aug 11, 2014 6:30 am
Location: Germany

log-normal distribution retention model

Post by beboehme » Mon Aug 11, 2014 7:25 am

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
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Jirka
Posts: 6195
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Re: log-normal distribution retention model

Post by Jirka » Mon Aug 11, 2014 7:38 am

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
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