View source: R/sw_Pedotransfer_Functions.R
ptf_Rosetta_for_vanGenuchten1980 | R Documentation |
SWRC
parameters using Rosetta
live API
Estimate van Genuchten 1980 SWRC
parameters using Rosetta
live API
ptf_Rosetta_for_vanGenuchten1980(
sand,
clay,
bdensity = NULL,
version = c("3", "1", "2"),
verbose = interactive(),
...
)
sand |
A numeric value or vector.
Sand content of the matric soil component
(< 2 mm fraction; units of |
clay |
A numeric value or vector.
Clay content of the matric soil component
(< 2 mm fraction; units of |
bdensity |
A numeric value or vector.
Density of the whole soil
(matric soil plus coarse fragments; units |
version |
A character string that selects a |
verbose |
A logical value. If |
... |
Additional function arguments passed on or ignored. |
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]
ptf_estimate()
is the function that should be directly called; this here
is an internal helper function.
This function calls soilDB::ROSETTA()
and
a live internet connection is required to access Rosetta
.
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")}
soilDB::ROSETTA()
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.