From 12a31f4c130c551f82232d9ef7dfb608bd52c53f Mon Sep 17 00:00:00 2001 From: Johannes Ranke Date: Tue, 27 Sep 2016 23:00:48 +0200 Subject: Reorganise repository using standard package layout --- pkg/man/PEC_soil.Rd | 119 ---------------------------------------------------- 1 file changed, 119 deletions(-) delete mode 100644 pkg/man/PEC_soil.Rd (limited to 'pkg/man/PEC_soil.Rd') diff --git a/pkg/man/PEC_soil.Rd b/pkg/man/PEC_soil.Rd deleted file mode 100644 index c0b5201..0000000 --- a/pkg/man/PEC_soil.Rd +++ /dev/null @@ -1,119 +0,0 @@ -% Generated by roxygen2: do not edit by hand -% Please edit documentation in R/PEC_soil.R -\name{PEC_soil} -\alias{PEC_soil} -\title{Calculate predicted environmental concentrations in soil} -\usage{ -PEC_soil(rate, rate_units = "g/ha", interception = 0, mixing_depth = 5, - PEC_units = "mg/kg", PEC_pw_units = "mg/L", interval = NA, - n_periods = Inf, tillage_depth = 20, chent = NA, DT50 = NA, - Koc = NA, Kom = Koc/1.724, t_avg = 0, scenarios = c("default", - "EFSA_2015"), porewater = FALSE) -} -\arguments{ -\item{rate}{Application rate in units specified below} - -\item{rate_units}{Defaults to g/ha} - -\item{interception}{The fraction of the application rate that does not reach the soil} - -\item{mixing_depth}{Mixing depth in cm} - -\item{PEC_units}{Requested units for the calculated PEC. Only mg/kg currently supported} - -\item{PEC_pw_units}{Only mg/L currently supported} - -\item{interval}{Period of the deeper mixing, defaults to 365, which is a year if -rate units are in days} - -\item{n_periods}{Number of periods to be considered for long term PEC calculations} - -\item{tillage_depth}{Periodic (see interval) deeper mixing in cm} - -\item{chent}{An optional chent object holding substance specific information. Can -also be a name for the substance as a character string} - -\item{DT50}{If specified, overrides soil DT50 endpoints from a chent object -If DT50 is not specified here and not available from the chent object, zero -degradation is assumed} - -\item{Koc}{If specified, overrides Koc endpoints from a chent object} - -\item{Kom}{Calculated from Koc by default, but can explicitly be specified -as Kom here} - -\item{t_avg}{Averaging times for time weighted average concentrations} - -\item{scenarios}{If this is 'default', the DT50 will be used without correction -and soil properties as specified in the REACH guidance (R.16, Table -R.16-9) are used for porewater PEC calculations. If this is "EFSA_2015", -the DT50 is taken to be a modelling half-life at 20°C and pF2 (for when -'chents' is specified, the DegT50 with destination 'PECgw' will be used), -and corrected using an Arrhenius activation energy of 65.4 kJ/mol. Also -model and scenario adjustment factors from the EFSA guidance are used.} - -\item{porewater}{Should equilibrium porewater concentrations be estimated -based on Kom and the organic carbon fraction of the soil instead of total -soil concentrations? Based on equation (7) given in the PPR panel opinion -(EFSA 2012, p. 24) and the scenarios specified in the EFSA guidance (2015, -p. 13).} -} -\value{ -The predicted concentration in soil -} -\description{ -This is a basic calculation of a contaminant concentration in bulk soil -based on complete, instantaneous mixing. If an interval is given, an -attempt is made at calculating a long term maximum concentration using -the concepts layed out for example in the PPR panel opinion (EFSA 2012). -} -\details{ -This assumes that the complete load to soil during the time specified by -'interval' (typically 365 days) is dosed at once. As in the PPR panel -opinion cited below (PPR panel 2012), only temperature correction using the -Arrhenius equation is performed. - -Total soil and porewater PEC values for the scenarios as defined in the EFSA -guidance (2015, p. 13) can easily be calculated. -} -\note{ -If temperature information is available in the selected scenarios, as - e.g. in the EFSA scenarios, the DT50 for groundwater modelling - (destination 'PECgw') is taken from the chent object, otherwise the DT50 - with destination 'PECsoil'. -} -\examples{ -PEC_soil(100, interception = 0.25) - -# This is example 1 starting at p. 79 of the EFSA guidance (2015) -PEC_soil(1000, interval = 365, DT50 = 250, t_avg = c(0, 21), - scenarios = "EFSA_2015") -PEC_soil(1000, interval = 365, DT50 = 250, t_av = c(0, 21), - Kom = 1000, scenarios = "EFSA_2015", porewater = TRUE) - -# The following is from example 4 starting at p. 85 of the EFSA guidance (2015) -# Metabolite M2 -# Calculate total and porewater soil concentrations for tier 1 scenarios -# Relative molar mass is 100/300, formation fraction is 0.7 * 1 -results_pfm <- PEC_soil(100/300 * 0.7 * 1 * 1000, interval = 365, DT50 = 250, t_avg = c(0, 21), - scenarios = "EFSA_2015") -results_pfm_pw <- PEC_soil(100/300 * 0.7 * 1000, interval = 365, DT50 = 250, t_av = c(0, 21), - Kom = 100, scenarios = "EFSA_2015", porewater = TRUE) -} -\author{ -Johannes Ranke -} -\references{ -EFSA Panel on Plant Protection Products and their Residues (2012) - Scientific Opinion on the science behind the guidance for scenario - selection and scenario parameterisation for predicting environmental - concentrations of plant protection products in soil. \emph{EFSA Journal} - \bold{10}(2) 2562, doi:10.2903/j.efsa.2012.2562 - - EFSA (European Food Safety Authority) (2015) EFSA guidance document for - predicting environmental concentrations of active substances of plant - protection products and transformation products of these active substances - in soil. \emph{EFSA Journal} \bold{13}(4) 4093 - doi:10.2903/j.efsa.2015.4093 -} - -- cgit v1.2.1