pF_curve {OBIC}

Water retention curve

Description

This function compute water content at given pressure head, using Van Genuchten water retention curve

Usage

pF_curve(head, thetaR, thetaS, alfa, n)

Arguments

head

(numeric) suction pressure ([L] or cm of water)

thetaR

(numeric) residual water content (cm3/cm3)

thetaS

(numeric) saturated water content (cm3/cm3)

alfa

(numeric) related to the inverse of the air entry suction, alfa > 0 (1/cm)

n

(numeric) a measure of the pore-size distribution, n>1, dimensionless

Value

theta (numeric) water content (cm3/cm3)

The moisture content of a soil given a certain pressure head. A numeric value.

Examples

pF_curve(head = 2.2, thetaR = 0.01, thetaS = 0.35, alfa = 0.3,n = 1.6)
pF_curve(head = 4.2, thetaR = 0.01, thetaS = 0.35, alfa = 0.3,n = 1.6)