Data and code for delineating catchment boundaries on Svalbard.
For catchment delineation, use Notebook 3 (notebooks 1 and 2 do not need re-running unless the input elevation data or pre-processing steps are changed.).
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Notebook 1 downloads raw data from the ArcticDEM server. The data are reprojected, merged and masked, then down-sampled to create versions with 10, 20 and 40 m resolution.
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Notebook 2 performs "terrain conditioning": vector streams and lakes are "burned in", pits are filled, and grids of flow direction and accumulation created.
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Notebook 3 reads an Excel file with outlet co-ordinates and derives catchment boundaries for each outlet.