Parameter estimation based on class of Staringreeks (Tabel 3, Wosten 2001)

pFpara_class(Pklei, Pleem, Psom, M50)

Arguments

Pklei: (numeric) The clay (<2um) content of the soil (%)
Pleem: (numeric) The loam (<50um) content of the soil (%) Pleem > 0
Psom: (numeric) The organic matter content of the soil (%) Psom > 0
M50: (numeric)size of sand fraction (um)

Value

a table with the following columns: 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 ksat (numeric) saturated hydraulic conductivity (cm/d)

Examples

pFpara_class(Pklei = 25, Pleem = 15, Psom = 4.5,M50 = 150)
#>    ThetaR ThetaS   alfa     n  ksat
#>     <num>  <num>  <num> <num> <num>
#> 1:   0.01   0.43 0.0064  1.21   0.7
pFpara_class(Pklei = 45, Pleem = 3, Psom = 4.5,M50 = 150)
#>    ThetaR ThetaS   alfa     n  ksat
#>     <num>  <num>  <num> <num> <num>
#> 1:   0.01   0.59 0.0195 1.109  4.53