View source: R/sw_Pedotransfer_Functions.R
ptf_neuroFX2021_for_FXW | R Documentation |
FXW
SWRC
parameters using neuroFX2021
Estimate FXW
SWRC
parameters using neuroFX2021
ptf_neuroFX2021_for_FXW(
sand,
clay,
bdensity = NULL,
file_neuroFX2021 = getOption("RSW2_FILENEUROFX2021", NULL),
...
)
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 |
file_neuroFX2021 |
A character string that contains the file name with
full path of the |
... |
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_s
): saturated volumetric water content
of the matric component (units of [cm / cm]
)
swrcp[1]
(alpha
): shape parameter (units of [cm-1]
)
swrcp[2]
(n
): shape parameter [-]
swrcp[3]
(m
): shape parameter [-]
swrcp[4]
(K_sat
): saturated hydraulic conductivity [cm / day]
swrcp[5]
(L
): tortuosity/connectivity parameter [-]
ptf_estimate()
is the function that should be directly called; this here
is an internal helper function.
This function requires that users download
the fitted neuroFX2021
neural networks published by Rudiyanto et al. 2021
in Supplementary Material 1 (resulting in a local file named xxx_mmc1.zip
).
This needs to be unzipped and the resulting tar
file unpacked;
this produces a folder R code for neuroFX2021
.
This folder contains two R data files : ssc.RData
and sscbd.RData
.
The argument file_neuroFX2021
is the file name (with path) to sscbd.RData
if soil density data are available and to ssc.RData
otherwise
(see Rudiyanto et al. 2021).
The path to the appropriate file can be set per R session
via option "RSW2_FILENEUROFX2021"
(and avoid passing it directly as argument to the function);
this can be useful, for example, if ptf_estimate()
is used for FXW
.
Rudiyanto, Minasny, B., Chaney, N. W., Maggi, F., Goh Eng Giap, S., Shah, R. M., Fiantis, D., & Setiawan, B. I. 2021. Pedotransfer functions for estimating soil hydraulic properties from saturation to dryness. Geoderma, 403:115194, \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.geoderma.2021.115194")}
Fredlund, D. G., & Xing, A. 1994. Equations for the soil-water characteristic curve. Canadian Geotechnical Journal, 31: 512–532, \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1139/t94-061")}
Wang, Y., Jin, M., & Deng, Z. 2018. Alternative model for predicting soil hydraulic conductivity over the complete moisture range. Water Resources Research, 54:6860–6876, \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1029/2018WR023037")}
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