SShorton: A Horton water infiltration model
In HydroMe: Estimating Water Retention and Infiltration Model Parameters using Experimental Data

Description Usage Arguments Details Value Author(s) References See Also Examples

This is a three- parameter function to determine water infiltration parameters contained in the Horrton infiltration model

1	SShorton(input, fc, f0, lrk)

`input`	Time
`fc`	Steady infiltration rate
`f0`	Initial infiltration rate
`lrk`	Shape factor related to soil pore continuity

This is a self-starting model for estimating parameters in the Horton infiltration model using instantaneous infiltration rates (here known as Rate) and time data (Time)

A list of objects returned by standard R regression functions such as nls and lm

Christian Thine Omuto

Horton RE. 1940. An approach towards a physical interpretation of infiltration capacity. Soil Science Society of America Proceedings 5: 227-237

SSphilip, SSgampt

data(infilt)
infil <- infilt[319:751,]
require("nlme")
hort.lis <- nlsList(log(Rate) ~ SShorton(Time,fc,f0,lrk) | PlotNo,
                    infil) # Rate is the y variable
hort.lis