Modelling of Soil Water Retention and Hydraulic Conductivity Data
Controlling fit_wrc_hcc
Evaporative Characteristic Length
Parametric Modelling of Soil Hydraulic Properties
Models for Soil Hydraulic Conductivity Functions
Internal Functions of Package soilhypfit
The soilhypfit Package
Profile Loglikelihoods and Confidence Intervals for Parametric Modelli...
Common S3 Methods for Class fit_wrc_hcc
Simulated Soil Water Retention and Hydraulic Conductivity Data
Physical properties of Swiss forest soils
Utility functions for package soilhypfit
vcov Method for Class fit_wrc_hcc
Models for Soil Water Retention Curves
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.