Description Usage Arguments Value References Examples
View source: R/ptf_hypres_regr.R
Derives the Mualem - van Genuchten parameters ThetaR, ThetaS, Alpha, n, Tort and Ksat from sand, silt, clay, bulk density, organic carbon content values
1 2 | hydpar_hypres(clay, silt, bd, oc.pct = 0.1, topsoil = TRUE,
humconv = 1.72)
|
clay |
clay mass percent |
silt |
silt mass percent |
bd |
bulk density in g cm-3 |
oc.pct |
organic carbon content in mass percent |
topsoil |
Is the sample from the topsoil? |
humconv |
conversion factor oc.pct to organic matter percent |
A data.frame with the number of rows equal to length(clay) The data.frame contains the following variables:
Saturation water content fraction
Residual water content fraction
Alpha parameter of van Genuchten water retention function, m-1
N parameter of van Genuchten water retention function
M parameter of van Genuchten water retention function
Saturated hyraulic conductivity parameter of Mualem hydraulic conductivity function, mm d-1
Tortuosity parameter of Mualem hydraulic conductivity function
Woesten JHM, Lilly A, Nemes A, Le Bas C (1999) Development and use of a database of hydraulic properties of European soils. Geoderma 90, pp. 169-185
1 | hydpar_hypres(20,20,1.5,2)
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