This implements the method specified in the UK data requirements handbook and was checked against the spreadsheet published on the CRC website

PEC_sw_drainage_UK(rate, interception = 0, Koc, latest_application = NULL,
  soil_DT50 = NULL, model = NULL, model_parms = NULL)

Arguments

rate
Application rate in g/ha
interception
The fraction of the application rate that does not reach the soil
Koc
The sorption coefficient normalised to organic carbon in L/kg
latest_application
Latest application date, formatted as e.g. "01 July"
soil_DT50
Soil degradation half-life, if SFO kinetics are to be used
model
The soil degradation model to be used. Either one of "FOMC", "DFOP", "HS", or "IORE", or an mkinmod object
model_parms
A named numeric vector containing the model parameters

Value

The predicted concentration in surface water in µg/L

Examples

PEC_sw_drainage_UK(150, Koc = 100)
#> [1] 8.076923