Function reference • pfm

General utility functions Functions that are independent of specific fate modelling areas
`geomean()`	Calculate the geometric mean
`one_box()`	Create a time series of decline data
`plot(<one_box>)`	Plot time series of decline data
`sawtooth()`	Create decline time series for multiple applications
`twa()`	Calculate a time weighted average concentration
`max_twa()`	The maximum time weighted average concentration for a moving window
`pfm_degradation()`	Calculate a time course of relative concentrations based on an mkinmod model
`SFO_actual_twa()`	Actual and maximum moving window time average concentrations for SFO kinetics
`FOMC_actual_twa()`	Actual and maximum moving window time average concentrations for FOMC kinetics
`reexports` `set_nd_nq` `set_nd_nq_focus`	Objects exported from other packages
`TSCF()`	Estimation of the transpiration stream concentration factor
Predicted environmental concentrations in soil
`PEC_soil()`	Calculate predicted environmental concentrations in soil
`PEC_soil_mets()`	Calculate initial and accumulation PEC soil for a set of metabolites
`soil_scenario_data_EFSA_2015`	Properties of the predefined scenarios from the EFSA guidance from 2015
`soil_scenario_data_EFSA_2017`	Properties of the predefined scenarios from the EFSA guidance from 2017
`PEC_FOMC_accu_rel()`	Get the relative accumulation of an FOMC model over multiples of an interval
`EFSA_washoff_2017`	Subset of EFSA crop washoff default values
Predicted environmental concentrations in groundwater
`FOCUS_GW_scenarios_2012`	A very small subset of the FOCUS Groundwater scenario definitions
`EFSA_GW_interception_2014`	Subset of EFSA crop interception default values for groundwater modelling
Predicted environmental concentrations in surface water
`PEC_sw_drift()`	Calculate predicted environmental concentrations in surface water due to drift
`drift_data_JKI`	Deposition from spray drift expressed as percent of the applied dose as published by the JKI
`PEC_sw_drainage_UK()`	Calculate initial predicted environmental concentrations in surface water due to drainage using the UK method
`PEC_sw_sed()`	Calculate predicted environmental concentrations in sediment from surface water concentrations
`PEC_sw_focus()`	Calculate PEC surface water at FOCUS Step 1
`chent_focus_sw()`	Create a chemical compound object for FOCUS Step 1 calculations
`FOCUS_Step_12_scenarios`	Step 1/2 scenario data as distributed with the FOCUS Step 1/2 calculator
`PEC_sw_exposit_drainage()`	Calculate PEC surface water due to drainage as in Exposit 3
`PEC_sw_exposit_runoff()`	Calculate PEC surface water due to runoff and erosion as in Exposit 3
`perc_runoff_exposit`	Runoff loss percentages as used in Exposit 3
`perc_runoff_reduction_exposit`	Runoff reduction percentages as used in Exposit
`TOXSWA_cwa`	R6 class for holding TOXSWA water concentration data and associated statistics
`read.TOXSWA_cwa()`	Read TOXSWA surface water concentrations
`plot(<TOXSWA_cwa>)`	Plot TOXSWA surface water concentrations
Classifications and indicators Evaluating environmental fate properties
`SSLRC_mobility_classification()`	Determine the SSLRC mobility classification for a chemical substance from its Koc
`GUS()` `print(<GUS_result>)`	Groundwater ubiquity score based on Gustafson (1989)
Work with chent objects containing relevant information
`endpoint()` `soil_DT50()` `soil_Kfoc()` `soil_N()` `soil_sorption()`	Retrieve endpoint information from the chyaml field of a chent object
Utilities
`get_vertex()`	Fit a parabola through three points

Reference

General utility functions

Predicted environmental concentrations in soil

Predicted environmental concentrations in groundwater

Predicted environmental concentrations in surface water

Classifications and indicators

Work with chent objects containing relevant information

Utilities