SWRC Model	Model Parameters	Model Reference (Name)
$θ (h) = θ_{r} + (θ_{s} - θ_{r}) {[1 + {(α h)}^{n}]}^{- m}$	θ_s, θ_r, α, n	Van Genutchen (1980)
$θ (h) = θ_{r} + (θ_{s} - θ_{r}) {[1 + {(α h)}^{n}]}^{- 1}$	θ_s, θ_r, α, n	Gardner (1958)
$θ (h) = (θ_{s} + θ_{r}) e^{- α h}$	θ_s, θ_r, α	Exponential (2007)
$θ (h) = θ_{s} {(α h)}^{λ}$	θ_s, α, λ	Campbell (1974)
$θ (h) = θ_{r} + (θ_{s} - θ_{r}) {(α h)}^{λ}$	θ_s, θ_r, α, λ	Brooks-Corey (1964)
$θ (h) = θ_{r} + (θ_{s} - θ_{r}) {[(1 + 0.5 α h) e^{0.5 α h}]}^{2 / n + 2}$	θ_s, θ_r, α, n	Ruso (1988)
$θ (h) = θ_{r} + (θ_{s} - θ_{r}) [1 + (α h) e^{α h}]$	θ_s, θ_r, α	Tani (1982)
$θ (h) = θ_{r} + \frac{1}{2} (θ_{s} - θ_{r}) erfc [\frac{\ln (h / h_{m})}{σ \sqrt{2}}]$	θ_s, θ_r, σ, h_m	Kosugi (1999)
$θ (h) = θ_{r} + \frac{θ_{s} - θ_{r}}{{\ln [2.7183 + {(α h)}^{n}]}^{m}}$	θ_s, θ_r, α, n, m	Fredlund-Xing (1994)
$θ (h) = θ_{r} + θ_{s 1} e^{- α_{1} h} + θ_{s 2} e^{- α_{2} h}$	θ_s1, θ_s2, α₁, α₂, θ_r	Biexponential (Omuto, 2009)