sncFun.02110 {spsh}

Unimodal Kosugi Non-Capillary Saturation Model

Description

Analytical implementation of the non-capillary saturation function for the (Kosugi 1996).

Usage

sncFun.02110(p_snc, h)

Arguments

p_snc

vector of the 2 Kosugi saturation model parameters, and h0 sensitve and has to be given as:

hm	air entry pressure head [cm]
sigma	width of pore size distribution [ - ]
h0	pressure head representing oven dryness given in pF, i.e. log[10](|pressure head| [cm])

h

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

Details

The function is Eq. Table 1-B in insertRefStreck.2020spsh The analytical solution presented in sncFun.02110 only requires the Kosugi specific model parameters and h0

Value

returns a list with calculations at specified h:

snc

non-capillary saturation

References

Kosugi K (1996). “Lognormal distribution model for unsaturated soil hydraulic properties.” Water Resources Research, 32(9), 2697–2703. ISSN 0043-1397. Streck T, Weber TKD (2020). “Analytical expressions for noncapillary soil water retention based on popular capillary retention models, accepted.” Vadose Zone Journal. ISSN 15391663 (ISSN).

Examples

p      <- c(0.1, 0.4, 100, 2, 100, .5)
# add h0
p_snc  <- c(p[3:4], 6.8)
h      <- 10^seq(-2, 6.8, length = 197)
Se     <- shypFun.02110(p, h)$Se
snc    <- sncFun.02110(p_snc, h)