Add simple drift PEC ini calculations

These are tested for field crops with the CRD spreadsheet

1 files changed, 42 insertions, 0 deletions

diff --git a/pkg/man/PEC_sw_drift.Rd b/pkg/man/PEC_sw_drift.Rd
new file mode 100644
index 0000000..20299a5
--- /dev/null
+++ b/pkg/man/PEC_sw_drift.Rd
@@ -0,0 +1,42 @@
+% Generated by roxygen2 (4.1.0.9001): do not edit by hand
+% Please edit documentation in R/PEC_sw_drift.R
+\name{PEC_sw_drift}
+\alias{PEC_sw_drift}
+\title{Calculate predicted environmental concentrations in surface water due to drift}
+\usage{
+PEC_sw_drift(rate, applications = 1, water_depth = 30, drift_data = "JKI",
+  crop = "Ackerbau", distances = c(1, 5, 10, 20), rate_units = "g/ha",
+  PEC_units = "µg/L")
+}
+\arguments{
+\item{rate}{Application rate in units specified below}
+
+\item{applications}{Number of applications for selection of drift percentile}
+
+\item{water_depth}{Depth of the water body in cm}
+
+\item{drift_data}{Source of drift percentage data}
+
+\item{crop}{Crop name (use German names for JKI data), defaults to "Ackerbau"}
+
+\item{distances}{The distances in m for which to get PEC values}
+
+\item{rate_units}{Defaults to g/ha}
+
+\item{PEC_units}{Requested units for the calculated PEC. Only µg/L currently supported}
+}
+\value{
+The predicted concentration in surface water
+}
+\description{
+This is a basic, vectorised form of a simple calculation of a contaminant
+concentration in surface water based on complete, instantaneous mixing
+with input via spray drift.
+}
+\examples{
+PEC_sw_drift(100)
+}
+\author{
+Johannes Ranke
+}
+