spsh - Estimation and Prediction of Parameters of Various Soil
Hydraulic Property Models
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>).