Calculate predicted environmental concentrations in surface water due to drift

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.

PEC_sw_drift(rate, applications = 1, water_depth = 30,
  drift_percentages = NULL, drift_data = "JKI", crop = "Ackerbau",
  distances = c(1, 5, 10, 20), rate_units = "g/ha",
  PEC_units = "µg/L")

Arguments

rate	Application rate in units specified below
applications	Number of applications for selection of drift percentile
water_depth	Depth of the water body in cm
drift_percentages	Percentage drift values for which to calculate PECsw. 'drift_data' and 'distances' if not NULL.
drift_data	Source of drift percentage data
crop	Crop name (use German names for JKI data), defaults to "Ackerbau"
distances	The distances in m for which to get PEC values
rate_units	Defaults to g/ha
PEC_units	Requested units for the calculated PEC. Only µg/L currently supported

Value

The predicted concentration in surface water

Examples

PEC_sw_drift(100)
#>        1 m        5 m       10 m       20 m 
#> 0.92333333 0.19000000 0.09666667 0.05000000