Package: soilhypfit
Version: 0.1-8
Date: 2025-07-24
Type: Package
Title: Modelling of Soil Water Retention and Hydraulic Conductivity
        Data
Authors@R: c(person("Andreas", "Papritz", role = c("aut", "cre"),
          email =  "papritz@retired.ethz.ch" ))
Author: Andreas Papritz [aut, cre]
Maintainer: Andreas Papritz <papritz@retired.ethz.ch>
Depends: nloptr(>= 1.2.1), snowfall
Imports: graphics, mgcv, quadprog(>= 1.5-7), parallel, Rmpfr(>= 0.7-2),
        stats, SoilHyP(>= 0.1.3), utils
Suggests: lattice
SystemRequirements: gmp (>= 4.2.3), mpfr (>= 3.0.0)
SystemRequirementsNote: 'MPFR' (MP Floating-Point Reliable Library,
        http://mpfr.org/) and 'GMP' (GNU Multiple Precision library,
        http://gmplib.org/) are required for Rmpfr
Description: Provides functions for efficiently estimating properties of 
         the Van Genuchten-Mualem model for soil hydraulic parameters from 
         possibly sparse soil water retention and hydraulic conductivity data 
         by multi-response parameter estimation methods 
         (Stewart, W.E., Caracotsios, M. Soerensen, J.P. (1992) 
         "Parameter estimation from multi-response data" 
         <doi:10.1002/aic.690380502>). Parameter estimation is simplified 
         by exploiting the fact that residual and saturated water contents 
         and saturated conductivity are conditionally linear parameters 
         (Bates, D. M.  and Watts, D. G. (1988) 
         "Nonlinear Regression Analysis and Its Applications" 
         <doi:10.1002/9780470316757>). 
         Estimated parameters are optionally constrained by the evaporation
         characteristic length (Lehmann, P., Bickel, S., Wei, Z. and Or, D. (2020)
         "Physical Constraints for Improved Soil Hydraulic Parameter 
         Estimation by Pedotransfer Functions" <doi:10.1029/2019WR025963>) 
         to ensure that the estimated parameters are physically valid. 
         Common S3 methods and further utility functions allow to process, 
         explore and visualise estimation results.
License: GPL (>= 2) | LGPL-3
NeedsCompilation: no
Packaged: 2025-07-24 09:06:32 UTC; papritz
Repository: CRAN
Date/Publication: 2025-07-24 10:00:03 UTC
Built: R 4.6.0; ; 2026-04-26 04:54:42 UTC; unix
