diff options
Diffstat (limited to 'R')
| -rw-r--r-- | R/PEC_sw_drift.R | 27 | ||||
| -rw-r--r-- | R/PEC_sw_exposit.R (renamed from R/PEC_sw_exposit_runoff.R) | 52 | ||||
| -rw-r--r-- | R/PEC_sw_sed.R | 22 |
3 files changed, 70 insertions, 31 deletions
diff --git a/R/PEC_sw_drift.R b/R/PEC_sw_drift.R index 22aa012..f503c74 100644 --- a/R/PEC_sw_drift.R +++ b/R/PEC_sw_drift.R @@ -4,9 +4,16 @@ #' concentration in surface water based on complete, instantaneous mixing #' with input via spray drift. #' +#' It is recommened to specify the arguments `rate`, `water_depth` and +#' `water_width` using [units::units] from the `units` package. +#' #' @inheritParams drift_percentages_rautmann +#' @importFrom units as_units set_units #' @seealso [drift_parameters_focus], [drift_percentages_rautmann] -#' @param rate Application rate in units specified below +#' @param rate Application rate in units specified below, or with units defined via the +#' `units` package. +#' @param rate_units Defaults to g/ha. For backwards compatibility, only used +#' if the specified rate does not have [units::units]]. #' @param drift_percentages Percentage drift values for which to calculate PECsw. #' Overrides 'drift_data' and 'distances' if not NULL. #' @param drift_data Source of drift percentage data. If 'JKI', the [drift_data_JKI] @@ -16,7 +23,6 @@ #' @param crop_group_JKI When using the 'JKI' drift data, one of the German names #' as used in [drift_parameters_focus]. #' @param water_depth Depth of the water body in cm -#' @param rate_units Defaults to g/ha #' @param PEC_units Requested units for the calculated PEC. Only µg/L currently supported #' @param water_width Width of the water body in cm #' @param side_angle The angle of the side of the water relative to the bottom which @@ -49,7 +55,7 @@ #' PEC_sw_drift(100, drift_data = "RF", formula = "FOCUS", side_angle = 45, water_width = 200) PEC_sw_drift <- function(rate, applications = 1, - water_depth = 30, + water_depth = as_units("30 cm"), drift_percentages = NULL, drift_data = c("JKI", "RF"), crop_group_JKI = c("Ackerbau", @@ -59,22 +65,27 @@ PEC_sw_drift <- function(rate, "fruit, late", "fruit, early", "aerial"), distances = c(1, 5, 10, 20), formula = c("Rautmann", "FOCUS"), - water_width = 100, + water_width = as_units("100 cm"), side_angle = 90, rate_units = "g/ha", PEC_units = "\u00B5g/L") { rate_units <- match.arg(rate_units) PEC_units <- match.arg(PEC_units) + # Set default units if not specified + if (!inherits(rate, "units")) rate <- set_units(rate, rate_units, mode = "symbolic") + if (!inherits(water_width, "units")) water_width <- set_units(water_width, "cm") + if (!inherits(water_depth, "units")) water_depth <- set_units(water_depth, "cm") drift_data <- match.arg(drift_data) crop_group_JKI <- match.arg(crop_group_JKI) crop_group_focus <- match.arg(crop_group_focus) formula <- match.arg(formula) if (side_angle < 0 | side_angle > 90) stop("The side anglemust be between 0 and 90 degrees") - mean_water_width <- if (side_angle == 90) water_width + mean_water_width <- if (side_angle == 90) water_width # Mean water width over waterbody depth else water_width - (water_depth / tanpi(side_angle/180)) - water_volume <- 100 * mean_water_width * (water_depth/100) * 1000 # in L (for 1 ha) - PEC_sw_overspray <- rate * 1e6 / water_volume # in µg/L + if (as.numeric(mean_water_width) < 0) stop("Undefined geometry") + relative_mean_water_width <- mean_water_width / water_width # Always <= 1 + PEC_sw_overspray <- set_units(rate / (relative_mean_water_width * water_depth), PEC_units, mode = "symbolic") dist_index <- as.character(distances) if (is.null(drift_percentages)) { @@ -82,7 +93,7 @@ PEC_sw_drift <- function(rate, JKI = pfm::drift_data_JKI[[applications]][dist_index, crop_group_JKI], RF = drift_percentages_rautmann(distances, applications, formula = formula, - crop_group_focus, widths = water_width/100) + crop_group_focus, widths = as.numeric(set_units(water_width, "m"))) ) names(drift_percentages) <- paste(dist_index, "m") } else { diff --git a/R/PEC_sw_exposit_runoff.R b/R/PEC_sw_exposit.R index 8b89cd9..a47ca18 100644 --- a/R/PEC_sw_exposit_runoff.R +++ b/R/PEC_sw_exposit.R @@ -47,6 +47,11 @@ #' This is a reimplementation of the calculation described in the Exposit 3.02 spreadsheet file, #' in the worksheet "Konzept Runoff". #' +#' It is recommened to specify the arguments `rate`, `Koc`, `DT50`, `t_runoff`, `V_ditch` and `V_event` +#' using [units::units] from the `units` package. +#' +#' @importFrom units as_units set_units drop_units +#' @importFrom dplyr across mutate #' @param rate The application rate in g/ha #' @param interception The fraction intercepted by the crop #' @param Koc The sorption coefficient to soil organic carbon @@ -74,43 +79,60 @@ #' @examples #' PEC_sw_exposit_runoff(500, Koc = 150) #' PEC_sw_exposit_runoff(600, Koc = 10000, DT50 = 195, exposit = "3.01a") -PEC_sw_exposit_runoff <- function(rate, interception = 0, Koc, DT50 = Inf, t_runoff = 3, +PEC_sw_exposit_runoff <- function(rate, interception = 0, Koc, DT50 = set_units(Inf, "d"), + t_runoff = set_units(3, "days"), exposit_reduction_version = c("3.02", "3.01a", "3.01a2", "2.0"), - V_ditch = 30, V_event = 100, dilution = 2) + V_ditch = set_units(30, "m3"), V_event = set_units(100, "m3"), dilution = 2) { + # Set default units if not specified + if (!inherits(rate, "units")) rate <- set_units(rate, "g/ha") + if (!inherits(Koc, "units")) Koc <- set_units(Koc, "L/kg") + if (!inherits(DT50, "units")) DT50 <- set_units(DT50, "d") + if (!inherits(t_runoff, "units")) t_runoff <- set_units(t_runoff, "d") + if (!inherits(V_ditch, "units")) V_ditch <- set_units(V_ditch, "m3") + if (!inherits(V_event, "units")) V_event <- set_units(V_event, "m3") + k_deg <- log(2)/DT50 - input <- rate * (1 - interception) * 1 * exp(-k_deg * t_runoff) # assumes 1 ha treated area + + # The input is calculated for an area of 1 ha + input <- rate * as_units(1, "ha") * (1 - interception) * exp(as.numeric(-k_deg * t_runoff)) + input_units <- units(input) + input_numeric <- drop_units(input) if (length(Koc) > 1) stop("Only one compound at a time supported") exposit_reduction_version <- match.arg(exposit_reduction_version) - red_water <- pfm::perc_runoff_reduction_exposit[[exposit_reduction_version]]["dissolved"] / 100 - red_bound <- pfm::perc_runoff_reduction_exposit[[exposit_reduction_version]]["bound"] / 100 reduction_runoff <- pfm::perc_runoff_reduction_exposit[[exposit_reduction_version]] / 100 + transfer_runoff <- 1 - reduction_runoff - V_runoff <- V_event * (1 - reduction_runoff[["dissolved"]]) # m3 + V_runoff <- V_event * (1 - reduction_runoff[["dissolved"]]) V_flowing_ditch_runoff <- dilution * (V_ditch + V_runoff) - + f_runoff_exposit <- function(Koc) { - Koc_breaks <- c(pfm::perc_runoff_exposit$Koc_lower_bound, Inf) + Koc_breaks <- c(pfm::perc_runoff_exposit$Koc_lower_bound, set_units(Inf, "L/kg")) Koc_classes <- as.character(cut(Koc, Koc_breaks, labels = rownames(pfm::perc_runoff_exposit))) perc_runoff <- pfm::perc_runoff_exposit[Koc_classes, c("dissolved", "bound")] if (identical(Koc, 0)) perc_runoff <- c(dissolved = 0, bound = 0) return(unlist(perc_runoff) / 100) } f_runoff <- f_runoff_exposit(Koc) - runoff_dissolved <- input * f_runoff["dissolved"] * transfer_runoff["dissolved"] - runoff_bound <- input * f_runoff["bound"] * transfer_runoff["bound"] - runoff_input <- cbind(runoff_dissolved, runoff_bound) - runoff_input$total <- runoff_input$dissolved + runoff_input$bound - PEC_sw_runoff <- 1000 * runoff_input / V_flowing_ditch_runoff + runoff_dissolved <- input_numeric * f_runoff["dissolved"] * transfer_runoff[, "dissolved"] + runoff_bound <- input_numeric * f_runoff["bound"] * transfer_runoff[, "bound"] + runoff_input <- cbind(dissolved = runoff_dissolved, bound = runoff_bound, + total = runoff_dissolved + runoff_bound) + rownames(runoff_input) <- rownames(reduction_runoff) + units(runoff_input) <- input_units + + dn <- dimnames(runoff_input) + PEC_sw_runoff <- set_units(runoff_input / V_flowing_ditch_runoff, "\u00B5g/L") + dimnames(PEC_sw_runoff) <- dn result <- list( perc_runoff = 100 * f_runoff, - runoff = runoff_input, - PEC_sw_runoff = PEC_sw_runoff) + runoff = as.data.frame(runoff_input), + PEC_sw_runoff = as.data.frame(PEC_sw_runoff)) return(result) } diff --git a/R/PEC_sw_sed.R b/R/PEC_sw_sed.R index 2865ab7..28e12d8 100644 --- a/R/PEC_sw_sed.R +++ b/R/PEC_sw_sed.R @@ -10,24 +10,30 @@ #' @param method The method used for the calculation #' @param sediment_depth Depth of the sediment layer #' @param water_depth Depth of the water body in cm -#' @param sediment_density The density of the sediment in L/kg (equivalent to +#' @param sediment_density The density of the sediment in kg/L (equivalent to #' g/cm3) #' @param PEC_sed_units The units of the estimated sediment PEC value #' @return The predicted concentration in sediment #' @export #' @author Johannes Ranke #' @examples +#' library(pfm) +#' library(units) #' PEC_sw_sed(PEC_sw_drift(100, distances = 1), percentage = 50) PEC_sw_sed <- function(PEC_sw, percentage = 100, method = "percentage", - sediment_depth = 5, water_depth = 30, - sediment_density = 1.3, + sediment_depth = set_units(5, "cm"), + water_depth = set_units(30, "cm"), + sediment_density = set_units(1.3, "kg/L"), PEC_sed_units = c("\u00B5g/kg", "mg/kg")) { - method = match.arg(method) - PEC_sed_units = match.arg(PEC_sed_units) + if (!inherits(PEC_sw, "units")) PEC_sw <- set_units(PEC_sw, "\u00B5g/L") + if (!inherits(sediment_depth, "units")) PEC_sw <- set_units(sediment_depth, "cm") + if (!inherits(water_depth, "units")) PEC_sw <- set_units(water_depth, "cm") + if (!inherits(sediment_density, "units")) PEC_sw <- set_units(sediment_density, "cm") + method <- match.arg(method) + PEC_sed_units <- match.arg(PEC_sed_units) if (method == "percentage") { - PEC_sed = PEC_sw * (percentage/100) * (water_depth / sediment_depth) * (1 / sediment_density) - if (PEC_sed_units == "mg/kg") PEC_sed <- PEC_sed / 1000 + PEC_sed <- PEC_sw * (percentage/100) * as.numeric((water_depth / sediment_depth)) * (1 / sediment_density) } - return(PEC_sed) + return(set_units(PEC_sed, PEC_sed_units, mode = "symbolic")) } |