Description :
Estimates model parameters of soil hydraulic property functions by
inverting measured data. A wide range of hydraulic models, weighting
schemes, global optimization algorithms, Markov chain Monte Carlo
samplers, and extended statistical analyses of results are provided.
Prediction of soil hydraulic property model parameters and common soil
properties using pedotransfer functions is facilitated. Parameter
estimation is based on identically and independentally distributed
(weighted) model residuals, and simple model selection criteria (Hoege,
M., Woehling, T., and Nowak, W. (2018) < doi:10.1002/2017WR021902>) can
be calculated. The included models are the van Genuchten-Mualem in its
unimodal, bimodal and trimodal form, the the Kosugi 2 parametric-Mualem
model, and the Fredlund-Xing model. All models can be extended to
account for non-capillary water storage and conductivity (Weber,
T.K.D., Durner, W., Streck, T. and Diamantopoulos, E. (2019)
< doi:10.1029/2018WR024584>. The isothermal vapour conductivity (Saito,
H., Simunek, J. and Mohanty, B.P. (2006) < doi:10.2136/vzj2006.0007>) is
calculated based on volumetric air space and a selection of different
tortuosity models: (Grable, A.R., Siemer, E.G. (1968)
< doi:10.2136/sssaj1968.03615995003200020011x>, Lai, S.H., Tiedje J.M.,
Erickson, E. (1976) < doi:10.2136/sssaj1976.03615995004000010006x>,
Moldrup, P., Olesen, T., Rolston, D.E., and Yamaguchi, T. (1997)
< doi:10.1097/00010694-199709000-00004>, Moldrup, P., Olesen, T.,
Yoshikawa, S., Komatsu, T., and Rolston, D.E. (2004)
< doi:10.2136/sssaj2004.7500>, Moldrup, P., Olesen, T., Yoshikawa, S.,
Komatsu, T., and Rolston, D.E. (2005)
< doi:10.1097/01.ss.0000196768.44165.1f>, Millington, R.J., Quirk, J.P.
(1961) < doi:10.1039/TF9615701200>, Penman, H.L. (1940)
< doi:10.1017/S0021859600048164>, and Xu, X, Nieber, J.L. Gupta, S.C.
(1992) < doi:10.2136/sssaj1992.03615995005600060014x>).
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