shypFun.02110 {spsh}

Unimodal Kosugi-Mualem Model (2 Parameter Model)

Description

Calculates the soil hydraulic property function values based on given pressure heads (Kosugi 1996).

Usage

shypFun.02110(p, h)

Arguments

p

vector of the 6 Kosugi-Mualem model parameters, order is sensitve and has to be given as:

thr	residual water water content [cm cm-3]
ths	saturated water water content [cm cm-3]
hm	air entry pressure head [cm]
sigma	width of pore size distribution [ - ]
Ks	saturated conductivity [cm d-1]
tau	exponent of Se in the capillary conductivity model, sometimes denoted in the literature as l [-]

h

pressure heads [cm] for which the corresponding retention and conductivity values are calculated.

Details

The function solves analytically the spec. water capacity function and integral to the capillary bundle model.

Value

returns a list with calculations at specified h:

theta

calculated volumetric moisture content

Se

calculated saturation

cap

specific water capacity function

psd

pore size distribution

Kh

Hydraulic conductivity values

References

Kosugi K (1996). “Lognormal distribution model for unsaturated soil hydraulic properties.” Water Resources Research, 32(9), 2697–2703. ISSN 0043-1397.

Examples

p      <- c(0.1, 0.4, 100, 2, 100, .5)
h      <- 10^seq(-2, 6.8, length = 197)
shyp.L <- shypFun.02110(p, h)