% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/parent_solutions.R
\name{DFOP.solution}
\alias{DFOP.solution}
\title{Double First-Order in Parallel kinetics}
\usage{
DFOP.solution(t, parent_0, k1, k2, g)
}
\arguments{
\item{t}{Time.}

\item{parent_0}{Starting value for the response variable at time zero.}

\item{k1}{First kinetic constant.}

\item{k2}{Second kinetic constant.}

\item{g}{Fraction of the starting value declining according to the first
kinetic constant.}
}
\value{
The value of the response variable at time \code{t}.
}
\description{
Function describing decline from a defined starting value using the sum of
two exponential decline functions.
}
\examples{

  plot(function(x) DFOP.solution(x, 100, 5, 0.5, 0.3), 0, 4, ylim = c(0,100))

}
\references{
FOCUS (2006) \dQuote{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,
\url{http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics}
FOCUS (2014) \dQuote{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
\url{http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics}
}
\seealso{
Other parent solutions: 
\code{\link{FOMC.solution}()},
\code{\link{HS.solution}()},
\code{\link{IORE.solution}()},
\code{\link{SFO.solution}()},
\code{\link{SFORB.solution}()},
\code{\link{logistic.solution}()}
}
\concept{parent solutions}