Calculate initial predicted environmental concentrations in surface water due to drainage using the UK method
Source:R/PEC_sw_drainage_UK.R
PEC_sw_drainage_UK.RdThis implements the method specified in the UK data requirements handbook and was checked against the spreadsheet
published on the CRC website. Degradation before the start of the drainage period is taken into account if
latest_application is specified and the degradation parameters are given either as a soil_DT50 or a model.
Usage
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
References
HSE's Chemicals Regulation Division (CRD) Active substance PECsw calculations (for UK specific authorisation requests) https://www.hse.gov.uk/pesticides/topics/pesticide-approvals/pesticides-registration/data-requirements-handbook/fate/active-substance-uk.htm accessed 2019-09-27
Drainage PECs Version 1.0 (2015) Spreadsheet published at https://www.hse.gov.uk/pesticides/topics/pesticide-approvals/pesticides-registration/data-requirements-handbook/fate/pec-tools-2015/PEC%20sw-sed%20(drainage).xlsx accessed 2019-09-27