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.

- - +

Usage

PEC_sw_drift(
+  rate,
+  applications = 1,
+  water_depth = 30,
+  drift_percentages = NULL,
+  drift_data = c("JKI", "RF"),
+  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. If 'JKI', the [drift_data_JKI] +included in the package is used. If 'RF', the Rautmann formula is used, if +implemented for the crop type and number of applications
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

PEC_sw_drift.Rd

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.

The predicted concentration in surface water

Author

Johannes Ranke

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

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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. If 'JKI', the [drift_data_JKI] -included in the package is used. If 'RF', the Rautmann formula is used, if -implemented for the crop type and number of applications
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 
# Alternatively, we can use the formula for a single application to "Ackerbau" from the paper
-PEC_sw_drift(100, drift_data = "RF")
#>        1 m        5 m       10 m       20 m 
-#> 0.92350000 0.19114149 0.09699222 0.04921742 

-# This makes it possible to also use different substances
-PEC_sw_drift(100, distances = c(1, 3, 5, 6, 10, 20, 50, 100), drift_data = "RF")
#>        1 m        3 m        5 m        6 m       10 m       20 m       50 m 
-#> 0.92350000 0.31512171 0.19114149 0.15990435 0.09699222 0.04921742 0.02007497 
-#>      100 m 
-#> 0.01018678 

-# Using custom drift percentages is also supported
-PEC_sw_drift(100, drift_percentages = c(2.77, 0.95, 0.57, 0.48, 0.29, 0.15, 0.06, 0.03))
#>     2.77 %     0.95 %     0.57 %     0.48 %     0.29 %     0.15 %     0.06 % 
-#> 0.92333333 0.31666667 0.19000000 0.16000000 0.09666667 0.05000000 0.02000000 
-#>     0.03 % 
-#> 0.01000000