Calculate PEC surface water due to runoff and erosion as in Exposit 3
Source:R/PEC_sw_exposit_runoff.R
PEC_sw_exposit_runoff.RdThis is a reimplementation of the calculation described in the Exposit 3.02 spreadsheet file, in the worksheet "Konzept Runoff".
Usage
>>>>>>> refs/remotes/origin/mainPEC_sw_exposit_runoff(
rate,
interception = 0,
Koc,
DT50 = Inf,
t_runoff = 3,
exposit_reduction_version = c("3.02", "3.01a", "3.01a2", "2.0"),
V_ditch = 30,
V_event = 100,
dilution = 2
)Source
Excel 3.02 spreadsheet available from https://www.bvl.bund.de/SharedDocs/Downloads/04_Pflanzenschutzmittel/zul_umwelt_exposit.html
Arguments
=======Source
Excel 3.02 spreadsheet available from https://www.bvl.bund.de/DE/04_Pflanzenschutzmittel/03_Antragsteller/04_Zulassungsverfahren/07_Naturhaushalt/psm_naturhaush_node.html#doc1400590bodyText3
Arguments
>>>>>>> refs/remotes/origin/main- rate
The application rate in g/ha
- interception
The fraction intercepted by the crop
- Koc
The sorption coefficient to soil organic carbon
- DT50
The soil half-life in days
- t_runoff
The time between application and the runoff event, where degradation occurs, in days
- exposit_reduction_version
The version of the reduction factors to be used. "3.02" is the current version used in Germany, "3.01a" is the version with additional percentages for 3 m and 6 m buffer zones used in Switzerland. "3.01a2" is a version introduced for consistency with previous calculations performed for a 3 m buffer zone in Switzerland, with the same reduction being applied to the dissolved and the bound fraction.
- V_ditch
The volume of the ditch is assumed to be 1 m * 100 m * 30 cm = 30 m3
- V_event
The unreduced runoff volume, equivalent to 10 mm precipitation on 1 ha
- dilution
The dilution factor
<<<<<<< HEAD
Value
A list containing the following components
- perc_runoff
The runoff percentages for dissolved and bound substance
- runoff
A matrix containing dissolved and bound input for the different distances
- PEC_sw_runoff
A matrix containing PEC values for dissolved and bound substance for the different distances. If the rate was given in g/ha, the PECsw are in microg/L.
See also
perc_runoff_exposit for runoff loss percentages and perc_runoff_reduction_exposit for runoff reduction percentages used
Examples
=======Value
A list containing the following components
- perc_runoff
The runoff percentages for dissolved and bound substance
- runoff
A matrix containing dissolved and bound input for the different distances
- PEC_sw_runoff
A matrix containing PEC values for dissolved and bound substance for the different distances. If the rate was given in g/ha, the PECsw are in microg/L.
See also
perc_runoff_exposit for runoff loss percentages and perc_runoff_reduction_exposit for runoff reduction percentages used
Examples
>>>>>>> refs/remotes/origin/main PEC_sw_exposit_runoff(500, Koc = 150)
#> $perc_runoff
#> dissolved bound
#> 0.248 0.001
#>
#> $runoff
#> dissolved bound total
#> No buffer 1.240 0.00500 1.24500
#> 5 m 0.744 0.00300 0.74700
#> 10 m 0.496 0.00075 0.49675
#> 20 m 0.248 0.00025 0.24825
#>
#> $PEC_sw_runoff
#> dissolved bound total
#> No buffer 4.769231 0.019230769 4.788462
#> 5 m 4.133333 0.016666667 4.150000
#> 10 m 3.542857 0.005357143 3.548214
#> 20 m 2.480000 0.002500000 2.482500
#>
PEC_sw_exposit_runoff(600, Koc = 10000, DT50 = 195, exposit = "3.01a")
#> $perc_runoff
#> dissolved bound
#> 0.037 0.159
#>
#> $runoff
#> dissolved bound total
#> No buffer 0.21964521 0.94388078 1.16352600
#> 3 m 0.16473391 0.66071655 0.82545046
#> 5 m 0.13178713 0.56632847 0.69811560
#> 6 m 0.12080487 0.42474635 0.54555122
#> 10 m 0.08785809 0.14158212 0.22944020
#> 20 m 0.04392904 0.04719404 0.09112308
#>
#> $PEC_sw_runoff
#> dissolved bound total
#> No buffer 0.8447893 3.6303107 4.4751000
#> 3 m 0.7844472 3.1462693 3.9307165
#> 5 m 0.7321507 3.1462693 3.8784200
#> 6 m 0.7106169 2.4985080 3.2091248
#> 10 m 0.6275578 1.0113008 1.6388586
#> 20 m 0.4392904 0.4719404 0.9112308
#>