Scap

0th

Percentile

Rescaled capillary saturation function

Rescaled capillary saturation function by Iden and Durner (2014)

Usage
Scap(suc, par.shp, modality = c("uni"), suc.negativ = FALSE)
Arguments
suc

Suction/pressure heads. Negative if suc.negativ = TRUE

par.shp

named parameter in list or vector

modality

pore size distribution ('uni' or 'bi')

suc.negativ

set TRUE if suction/pressure heads are negative and FALSE if positive

Details

additional for bimodal ('bi') pore size distribution: w2 [-]: weigthing between pore space distribution alfa2 [1/L]: van Genuchten parameter alfa for second pore space distribution n2 [-]: van Genuchten parameter n for second pore space distribution m2 [-]: shape parameter (m = 1-(1/n2) if missing)

Scap(h) = (Gamma(h)- Gamma(h0))/(1 - Gamma(h0)) Gamma descripes the capillary saturation function. Here the saturation function of van Genuchten is used: gamma(h) = (1/(1 + -suc * alfa)^n)^m (see also Sat)

References

Iden, S., Durner, W. (2014). Comment to Simple consistent models for water retention and hydraulic conductivity in the complete moisture range by A. Peters. Water Resour. Res. 50, 7530<U+2013>7534.

Schneider, M., & Goss, K. U. (2012). Prediction of the water sorption isotherm in air dry soils. Geoderma, 170, 64-69.

Aliases
  • Scap
Documentation reproduced from package SoilHyP, version 0.1.3, License: GPL (>= 2)

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