Good Afternoon!
I am using RetC for solving "retention data only" and "no fitting(Forward Problem)" using USDA texture data. Now I have also textural data with a different threshold for sand and silt(Sand 0.2-0.063 mm; Silt 0.063-0.002 mm, WRB/FAO classification). As I figured out there is no setting in Rosetta lite for different textural classifications, Is RetC any good for this input data?
I assume I need alternative PTF to estimate the vanGenuchten parameters which I can, in turn, then enter into RetC?
Thanks for your time!
Matthias
Determination of SWRC by WRB/FAO texture
Re: Determination of SWRC by WRB/FAO texture
Correct. Rosetta has its own fixed limits for textural data. RETC does not really have anything to do with that. It can only use Rosetta, to provide you with the initial estimate of soil hydraulic parameters, before you start fitting the actual retention data. J.
Re: Determination of SWRC by WRB/FAO texture
Hello Jirka,
thank you for the answer. I guess the faulty estimate of the initial soil hydraulic parameters when actual retention data are available should not have significant influence on the results.
However if I am picturing the problem correctly, for proper parameter estimation I would need PTF based on the FAO/WRB 63um sand/silt limit. If anybody has seen these, please give me a hint here.
However it might also be worth a try to use the soil texture wizard by Julien Moeys to convert from one system into the other
https://cran.r-project.org/web/packages ... gnette.pdf
thank you for the answer. I guess the faulty estimate of the initial soil hydraulic parameters when actual retention data are available should not have significant influence on the results.
However if I am picturing the problem correctly, for proper parameter estimation I would need PTF based on the FAO/WRB 63um sand/silt limit. If anybody has seen these, please give me a hint here.
However it might also be worth a try to use the soil texture wizard by Julien Moeys to convert from one system into the other
https://cran.r-project.org/web/packages ... gnette.pdf