Function describing exponential decline from a defined starting value, with a decreasing rate constant.
FOMC.solution(t, parent_0, alpha, beta)
The value of the response variable at time t
.
Time.
Starting value for the response variable at time zero.
Shape parameter determined by coefficient of variation of rate constant values.
Location parameter.
The form given here differs slightly from the original reference by
Gustafson and Holden (1990). The parameter beta
corresponds to 1/beta
in the original equation.
FOCUS (2006) “Guidance Document on Estimating Persistence and Degradation Kinetics from Environmental Fate Studies on Pesticides in EU Registration” Report of the FOCUS Work Group on Degradation Kinetics, EC Document Reference Sanco/10058/2005 version 2.0, 434 pp, http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics
FOCUS (2014) “Generic guidance for Estimating Persistence and Degradation Kinetics from Environmental Fate Studies on Pesticides in EU Registration” Report of the FOCUS Work Group on Degradation Kinetics, Version 1.1, 18 December 2014 http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics
Gustafson DI and Holden LR (1990) Nonlinear pesticide dissipation in soil: A new model based on spatial variability. Environmental Science and Technology 24, 1032-1038
Other parent solutions:
DFOP.solution()
,
HS.solution()
,
IORE.solution()
,
SFO.solution()
,
SFORB.solution()
,
logistic.solution()
plot(function(x) FOMC.solution(x, 100, 10, 2), 0, 2, ylim = c(0, 100))
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