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)
| 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 |
The predicted concentration in surface water in µg/L
PEC_sw_drainage_UK(150, Koc = 100)#> [1] 8.076923