Kfilm

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

par.shp

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

modality

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

suc.negativ

Relative film conductivity described by Peters (2013).

Provides functions for (1) soil water retention (SWC) and unsaturated hydraulic conductivity (Ku) (van Genuchten-Mualem (vGM or vG) [1, 2], Peters-Durner-Iden (PDI) [3, 4, 5], Brooks and Corey (bc) [8]), (2) fitting of parameter for SWC and/or Ku using Shuffled Complex Evolution (SCE) optimisation and (3) calculation of soil hydraulic properties (Ku and soil water contents) based on the simplified evaporation method (SEM) [6, 7].
Main references:
[1] van Genuchten (1980) <doi:10.2136/sssaj1980.03615995004400050002x>,
[2] Mualem (1976) <doi:10.1029/WR012i003p00513>,
[3] Peters (2013) <doi:10.1002/wrcr.20548>,
[4] Iden and Durner (2013) <doi:10.1002/2014WR015937>,
[5] Peters (2014) <doi:10.1002/2014WR015937>,
[6] Wind G. P. (1966),
[7] Peters and Durner (2008) <doi:10.1016/j.jhydrol.2008.04.016> and
[8] Brooks and Corey (1964).

Kfilm: Relative film conductivity

Description

Usage

Arguments

Details

References

See Also