From 72c56f4246966c1bea627f601cf3cc457734f023 Mon Sep 17 00:00:00 2001 From: Johannes Ranke Date: Tue, 19 Feb 2019 12:27:00 +0100 Subject: Add German drainage calculations using Exposit 3.02 --- man/PEC_sw_exposit_drainage.Rd | 60 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 man/PEC_sw_exposit_drainage.Rd (limited to 'man/PEC_sw_exposit_drainage.Rd') diff --git a/man/PEC_sw_exposit_drainage.Rd b/man/PEC_sw_exposit_drainage.Rd new file mode 100644 index 0000000..237d8cf --- /dev/null +++ b/man/PEC_sw_exposit_drainage.Rd @@ -0,0 +1,60 @@ +% Generated by roxygen2: do not edit by hand +% Please edit documentation in R/PEC_sw_exposit_runoff.R +\name{PEC_sw_exposit_drainage} +\alias{PEC_sw_exposit_drainage} +\title{Calculate PEC surface water due to drainage as in Exposit 3} +\source{ +Excel 3.02 spreadsheet available from + \url{https://www.bvl.bund.de/DE/04_Pflanzenschutzmittel/03_Antragsteller/04_Zulassungsverfahren/07_Naturhaushalt/psm_naturhaush_node.html#doc1400590bodyText3} +} +\usage{ +PEC_sw_exposit_drainage(rate, interception = 0, Koc = NA, + mobility = c(NA, "low", "high"), DT50 = Inf, t_drainage = 3, + V_ditch = 30, V_drainage = c(spring = 10, autumn = 100), + dilution = 2) +} +\arguments{ +\item{rate}{The application rate in g/ha} + +\item{interception}{The fraction intercepted by the crop} + +\item{Koc}{The sorption coefficient to soil organic carbon used to determine the mobility. A trigger +value of 550 L/kg is used in order to decide if Koc >> 500.} + +\item{mobility}{Overrides what is determined from the Koc.} + +\item{DT50}{The soil half-life in days} + +\item{t_drainage}{The time between application and the drainage event, where degradation occurs, in days} + +\item{V_ditch}{The volume of the ditch is assumed to be 1 m * 100 m * 30 cm = 30 m3} + +\item{V_drainage}{The drainage volume, equivalent to 1 mm precipitation on 1 ha for spring/summer or 10 mm for +autumn/winter/early spring.} + +\item{dilution}{The dilution factor} +} +\value{ +A list containing the following components + \describe{ + \item{perc_runoff}{The runoff percentages for dissolved and bound substance} + \item{runoff}{A matrix containing dissolved and bound input for the different distances} + \item{PEC_sw_runoff}{A matrix containing PEC values for dissolved and bound substance + for the different distances. If the rate was given in g/ha, the PECsw are in microg/L.} + } +} +\description{ +This is a reimplementation of the calculation described in the Exposit 3.02 spreadsheet file, +in the worksheet "Konzept Drainage". Although there are four groups of +compounds ("Gefährdungsgruppen"), only one distinction is made in the +calculations, between compounds with low mobility (group 1) and compounds +with modest to high mobility (groups 2, 3 and 4). In this implementation, +the group is derived only from the Koc, if not given explicitly. For +details, see the discussion of the function arguments below. +} +\examples{ + PEC_sw_exposit_drainage(500, Koc = 150) +} +\seealso{ +\code{\link{perc_runoff_exposit}} for runoff loss percentages and \code{\link{perc_runoff_reduction_exposit}} for runoff reduction percentages used +} -- cgit v1.2.1