SShorton: A Horton water infiltration model

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

Description

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

Usage

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SShorton(input, fc, f0, lrk)

Arguments

input

Time

fc

Steady infiltration rate

f0

Initial infiltration rate

lrk

Shape factor related to soil pore continuity

Details

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)

Value

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

Author(s)

Christian Thine Omuto

References

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

See Also

SSphilip, SSgampt

Examples

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


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