This function processes EU-Hydro River Network Database to calculate the length of rivers in each Strahler number. The Strahler number is used as an index for river network classification, with higher numbers representing larger, more significant river segments. The function reads and processes zip-compressed geographic data (GPKG files), extracts relevant information about river segments, computes the length of rivers for each Strahler order per grid cell, and outputs the results both as raster files and RData objects. The calculated length represents the total length of rivers in each Strahler number or larger (e.g., for STRAHLER_5, the length of rivers with STRAHLER values of 5 or higher).
Usage
River_Length(
FromHPC = TRUE,
EnvFile = ".env",
Filename = "EU_hydro_gpkg_eu.zip",
Cleanup = FALSE
)Arguments
- FromHPC
Logical indicating whether the work is being done from HPC, to adjust file paths accordingly. Default:
TRUE.- EnvFile
Character. The path to the environment file containing variables required by the function. Default is ".env".
- Filename
Character. The name of the ZIP file containing the river network data. Default is "EU_hydro_gpkg_eu.zip".
- Cleanup
Logical indicating whether to clean up temporary files from the Interim directory after finishing calculations. Default:
FALSE.
Details
The data provides at pan-European level a photo-interpreted river network, consistent of surface interpretation of water bodies (lakes and wide rivers), and a drainage model (also called Drainage Network), derived from EU-DEM, with catchments and drainage lines and nodes.
Data source: EU-Hydro River Network Database v013 | DOI | Download link
Temporal extent: 2006-2012; Format: Vector (GPKG); Size: 4 GB