% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/max_twa_parent.R
\name{max_twa_parent}
\alias{max_twa_parent}
\alias{max_twa_sfo}
\alias{max_twa_fomc}
\alias{max_twa_dfop}
\alias{max_twa_hs}
\title{Function to calculate maximum time weighted average concentrations from
kinetic models fitted with mkinfit}
\usage{
max_twa_parent(fit, windows)
max_twa_sfo(M0 = 1, k, t)
max_twa_fomc(M0 = 1, alpha, beta, t)
max_twa_dfop(M0 = 1, k1, k2, g, t)
max_twa_hs(M0 = 1, k1, k2, tb, t)
}
\arguments{
\item{fit}{An object of class \code{\link{mkinfit}}.}
\item{windows}{The width of the time windows for which the TWAs should be
calculated.}
\item{M0}{The initial concentration for which the maximum time weighted
average over the decline curve should be calculated. The default is to use
a value of 1, which means that a relative maximum time weighted average
factor (f_twa) is calculated.}
\item{k}{The rate constant in the case of SFO kinetics.}
\item{t}{The width of the time window.}
\item{alpha}{Parameter of the FOMC model.}
\item{beta}{Parameter of the FOMC model.}
\item{k1}{The first rate constant of the DFOP or the HS kinetics.}
\item{k2}{The second rate constant of the DFOP or the HS kinetics.}
\item{g}{Parameter of the DFOP model.}
\item{tb}{Parameter of the HS model.}
}
\value{
For \code{max_twa_parent}, a numeric vector, named using the
\code{windows} argument. For the other functions, a numeric vector of
length one (also known as 'a number').
}
\description{
This function calculates maximum moving window time weighted average
concentrations (TWAs) for kinetic models fitted with \code{\link{mkinfit}}.
Currently, only calculations for the parent are implemented for the SFO,
FOMC, DFOP and HS models, using the analytical formulas given in the PEC
soil section of the FOCUS guidance.
}
\examples{
fit <- mkinfit("FOMC", FOCUS_2006_C, quiet = TRUE)
max_twa_parent(fit, c(7, 21))
}
\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}
}
\author{
Johannes Ranke
}
