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Convert ERA5 data from open meteo to SWAT+ input.

Source: R/era5_swatplus.R
era5_swatplus.Rd

Usage of this function require the user to first download the ERA5 data from open-meteo. Please see below for instructions.

Usage

era5_swatplus(
  open_meteo_path,
  open_meteo_variables = c("temperature_2m_max", "temperature_2m_min",
    "precipitation_sum", "shortwave_radiation_sum", "wind_speed_10m_mean",
    "relative_humidity_2m_mean"),
  extract_path,
  swat_setup,
  aux_data = NULL,
  epsg_code = NULL,
  verbose = TRUE,
  selected_vars = c("max_temp", "min_temp", "precipitation_amount", "rad", "windspeed",
    "rh"),
  write_wgn = TRUE,
  clean_files = TRUE,
  sqlite_path = NULL,
  fill_missing = FALSE
)

Arguments

open_meteo_path

path to file downloaded from open-meteo in daily format with the correct variables

open_meteo_variables

character vector of which variables were downloaded. IMPORT TO KEEP THE ORDER CORRECT (same as in API request!). The default values are those needed for the SWAT+ setup.

extract_path

path to location where data can be extracted and processed

swat_setup

path to swat+ setup

aux_data

if auxiliary data is to be added, path to xlsx file using SWATprepR formatting.

epsg_code

See SWATprepR docs

verbose

Print? default is TRUE

selected_vars

Variables to incorporate from ERA5. default is all of them.

write_wgn

See SWATprepR docs

clean_files

See SWATprepR docs

sqlite_path

See SWATprepR docs

fill_missing

See SWATprepR docs

Value

Nothing

Details

To apply ERA5 data to a SWAT+ setup, you need to first independently download said data from open-meteo.com. Please note, there is a limit on downloads for the free tier, which is why (for now) it is not directly implemented in miljotools. When downloading the data for use in this package, please follow the following template EXACTLY, only changing the grid cells (list format), start and end date, and perhaps the variables (UNTESTED – make sure to adjust the open_meteo_variables parameter). Any deviations will probably cause errors. If you would like to make the function more robust for your use case, feel free to submit a pull request!

Here is the template URL: [link] Once you have downloaded your data, You can use the function to apply ERA5 meteorological data to a SWAT+ setup:

Please see the SWATprepR docs for details on some of the optional parameters.