rho 1000[kg/m^3] "Water density"
poro 0.43 Porosity
theta_r 0.045 "Residual liquid volume fraction"
K 8.25e-5[m/s] "Hydraulic conductivity"
chi_f 4.4e-10[1/Pa] "Compressibility of fluid"
chi_p 1e-8[1/Pa] "Compressibility of solid"
alpha 14.5[1/m] "Constitutive relation constant"
n 2.68 "Constitutive relation constant"
l 0.5 "Constitutive relation constant"
Hp0 -0.06[m] "Pressure head"