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Generate Weather Generator (WGN) Data for SWAT+ Model

Source: R/preparing.R
prepare_wgn.Rd

This function generates weather generator (WGN) data for a SWAT+ model based on meteorological data.

Usage

prepare_wgn(
  meteo_lst,
  TMP_MAX = NULL,
  TMP_MIN = NULL,
  PCP = NULL,
  RELHUM = NULL,
  WNDSPD = NULL,
  MAXHHR = NULL,
  SLR = NULL
)

Arguments

meteo_lst

Nested list with dataframes. Nested structure: meteo_lst -> data -> Station ID -> Parameter -> Dataframe (DATE, PARAMETER), meteo_lst -> stations -> Dataframe (ID, Name, Elevation, Source, geometry, Long, Lat).

meteo_lst can be created using load_template function using 'xlsx' template file or it could to be created with load_swat_weather function loading information from SWAT+ model setup weather files.

TMP_MAX

(optional) Dataframe with two columns: DATE : POSIXct, TMP_MAX : num. This parameter refers to data, which should be used instead if TMP_MAX variable is missing for a station. Default TMP_MAX = NULL, data of the closest station with data will be used. Units: Celsius.

TMP_MIN

(optional) Dataframe with two columns: DATE : POSIXct, TMP_MIN : num. This parameter refers to data, which should be used instead if TMP_MIN variable is missing for a station. Default TMP_MIN = NULL, indicating that data of the closest station with data will be used. Units: Celsius.

PCP

(optional) Dataframe with two columns: DATE : POSIXct, PCP : num. This parameter refers to data, which should be used instead if PCP variable is missing for a station. Default PCP = NULL, indicating that data of the closest station with data will be used. Units: mm/day.

RELHUM

(optional) Dataframe with two columns: DATE : POSIXct, RELHUM : num. This parameter refers to data, which should be used instead if RELHUM variable is missing for a station. Default RELHUM = NULL, indicating that data of the closest station with data will be used. Units: ratio 0-1.

WNDSPD

(optional) Dataframe with two columns: DATE : POSIXct, WNDSPD : num. This parameter refers to data, which should be used instead if WNDSPD variable is missing for a station. Default WNDSPD = NULL, indicating that data of the closest station with data will be used. Units: m/s.

MAXHHR

(optional) Dataframe with two columns: DATE : POSIXct, MAXHHR : num. This parameter refers to data, which should be used instead if MAXHHR variable is missing for a station. Default MAXHHR = NULL, indicating that data of the closest station with data will be used. Units: mm.

SLR

(optional) Dataframe with two columns: DATE : POSIXct, SLR : num. This parameter refers to data, which should be used instead if SLR variable is missing for a station. Default SLR = NULL, indicating that data of the closest station with data will be used. Units: MJ/m2.

Value

List of two dataframes: wgn_st - WGN station data, wgn_data - WGN data.

See also

load_template

Examples

if (FALSE) {
  # Example usage:
  temp_path <- system.file("extdata", "weather_data.xlsx", package = "SWATprepR")
  met_lst <- load_template(temp_path, 3035)
  # Generate WGN data
  wgn <- prepare_wgn(met_lst,
                     TMP_MAX = met_lst$data$ID10$TMP_MAX,
                     TMP_MIN = met_lst$data$ID10$TMP_MIN,
                     PCP = met_lst$data$ID9$PCP,
                     RELHUM = met_lst$data$ID9$RELHUM,
                     WNDSPD = met_lst$data$ID10$WNDSPD,
                     MAXHHR = met_lst$data$ID11$MAXHHR,
                     SLR = met_lst$data$ID9$SLR)
}