soilphysics (version 2.1)

hydraulicCutOff: Pore Water Suction at the Point of Hydraulic Cut-Off

Description

The pore water suction at the point of hydraulic cut-off occurs at the point where the residual water content, obtained from Dexter et al. (2008), intercepts with the Groenevelt & Grant (2004) retention curve.

Usage

hydraulicCutOff(theta_R, k0, k1, n, x0 = 6.653)

Arguments

theta_R

a parameter that represents the residual water content at the the Dexter's (2008) Water Retention Model.

k0

a parameter value, extracted from the water retention curve based on the Groenevelt & Grant (2004) formula.

k1

a parameter value, extracted from the water retention curve based on the Groenevelt & Grant (2004) formula.

n

a parameter value, extracted from the water retention curve based on the Groenevelt & Grant (2004) formula.

x0

the value of pF (pore water suction) at which the soil water content becomes zero. The default is 6.653.

Value

• The water suction at the point of hydraulic cut-off.

References

Dexter, A.R.; Czyz, E.A.; Richard, G.; Reszkowska, A. (2008). A user-friendly water retention function that takes account of the textural and structural pore spaces in soil. Geoderma, 143:243--253. Groenevelt, P.H.; Grnat, C.D. (2004). A new model for the soil-water retention curve that solves the problem of residual water contents. European Journal of Soil Science, 55:479--485.

See Also

fitsoilwater2, fitsoilwater3

Examples

# Dexter et al. (2012), Table 4A
hydraulicCutOff(0.1130, 6.877, 0.6508, 1.0453)
hydraulicCutOff(0.1122, 12.048, 0.4338, 2.0658)

# End (not run)