ptf_Rosetta_for_vanGenuchten1980: Estimate van Genuchten 1980 'SWRC' parameters using 'Rosetta'...

In Burke-Lauenroth-Lab/rSOILWAT2: An Ecohydrological Ecosystem-Scale Water Balance Simulation Model

Estimate van Genuchten 1980 SWRC parameters using Rosetta live API

Description

Estimate van Genuchten 1980 SWRC parameters using Rosetta live API

Usage

ptf_Rosetta_for_vanGenuchten1980(
  sand,
  clay,
  bdensity = NULL,
  version = c("3", "1", "2"),
  verbose = interactive(),
  ...
)

Arguments

sand	A numeric value or vector. Sand content of the matric soil component (< 2 mm fraction; units of ⁠[g/g]⁠) of each soil layer.
clay	A numeric value or vector. Clay content of the matric soil component (< 2 mm fraction; units of ⁠[g/g]⁠) of each soil layer.
bdensity	A numeric value or vector. Density of the whole soil (matric soil plus coarse fragments; units ⁠[g/cm3]⁠).
version	A character string that selects a Rosetta version.
verbose	A logical value. If TRUE, then display SOILWAT2 internal warnings and other messages.
...	Additional function arguments passed on or ignored.

Value

swrcp, i.e,. a numeric matrix where rows represent soil (layers) and columns represent a fixed number of SWRC parameters:

• swrcp[0] (theta_r): residual volumetric water content of the matric component (units of ⁠[cm / cm]⁠)

• swrcp[1] (theta_s): saturated volumetric water content of the matric component (units of ⁠[cm / cm]⁠)

• swrcp[2] (alpha): related to the inverse of air entry suction (units of ⁠[cm-1]⁠)

• swrcp[3] (n): measure of the pore-size distribution ⁠[-]⁠

• swrcp[4] (K_sat): saturated hydraulic conductivity ⁠[cm / day]⁠

Details

ptf_estimate() is the function that should be directly called; this here is an internal helper function.

Notes

This function calls soilDB::ROSETTA() and a live internet connection is required to access Rosetta.

References

Mualem, Y. 1976. A new model for predicting the hydraulic conductivity of unsaturated porous media. Water Resources Research, 12:513-522, \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1029/WR012i003p00513")}

van Genuchten, M. T. 1980. A Closed-form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils. Soil Science Society of America Journal, 44:892-898, \Sexpr[results=rd]{tools:::Rd_expr_doi("10.2136/sssaj1980.03615995004400050002x")}

Zhang, Y., & Schaap, M. G. 2017. Weighted recalibration of the Rosetta pedotransfer model with improved estimates of hydraulic parameter distributions and summary statistics (Rosetta3). Journal of Hydrology, 547:39-53, \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.jhydrol.2017.01.004")}

See Also

soilDB::ROSETTA()

Burke-Lauenroth-Lab/rSOILWAT2 documentation built on Dec. 9, 2023, 1:46 a.m.