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Version 1.0 · North America and South America · basin and region masks released

FullBasin

Based on HydroSHEDS v2.0 (Lehner et al., 2022; data version 2.0), the 1 arc-second flow directions, about 30 m at the equator. FullBasin on HydroSHEDS v2.0 is an independent dataset and is not part of the official HydroSHEDS family of products.

The basin mask and the region masks of FullBasin, computed on HydroSHEDS v2.0 at 30 m, one continent at a time. Every land pixel is assigned to the outlet it drains to. Whole basins are gathered into basin groups along the HydroBASINS Level-01, Level-02 and Level-03 units. The continent is also divided into regions that fit a workstation's memory, at capacities of 160, 80 and 40 square degrees; a basin too large for one region is cut into pieces at tributary outlets, and every later step works one region at a time. Tables carry the 30 m numbers; the maps draw the same basins and regions, simplified. Licence: CC BY 4.0.

Open the map and tables
Where this stands

The first layers of FullBasin at 30 m. FullBasin at 90 m also has a per-pixel upstream index and sixteen upstream attributes; at 30 m these are not computed yet. This release is the complete division of North America and South America into basins and regions, with tables for every basin of at least 1 km², every basin group and every region. HydroSHEDS v2 has released the Americas so far; the other continents will follow as it releases them.

Resolution
1 arcsec, about 30 m; maps simplified
North America
424,800 × 277,200 pixels; 30,077,037 outlets (30,074,804 on the coast, 2,233 inland), 105,581 basins of at least 1 km² in the table; basin groups: Level-01 (3), Level-02 (15), Level-03 (48); regions at capacities of 160, 80 and 40 square degrees: 106, 196, 371
South America
219,600 × 259,200 pixels; 7,383,055 outlets (7,377,562 on the coast, 5,493 inland), 38,510 basins of at least 1 km² in the table; basin groups: Level-01 (3), Level-02 (9), Level-03 (33); regions at capacities of 160, 80 and 40 square degrees: 59, 99, 209
Layers
basin mask · region masks · basin table · basin group tables · region tables · piece tables of the cut basins · simplified polygons
Licence
CC BY 4.0
The layers

What is in the release

ReleasedBasin and region masks

The basin mask assigns every land pixel to the outlet it drains to; the outlets are numbered by the area they drain, largest first. It answers where a pixel drains to. The same basins are gathered into basin groups along the HydroBASINS Level-01, Level-02 and Level-03 units, and three region masks divide the continent at capacities of 160, 80 and 40 square degrees. The page shows the map on the left and the released tables on the right; choose the continent on the page.

LaterWhat drains into a pixel · what the upstream land is like

The per-pixel upstream index and the upstream attributes, released for FullBasin at 90 m, are not yet computed at 30 m.

Every file, both continents rasters at 30 m · tables · simplified vectors and tiles · licence CC BY 4.0
Site under development — for browsing only, not for download yet. Some results are still being recomputed with refined methods, so the files here may still be replaced. Any changes to the results are small refinements, not major revisions. When this notice is gone, the files are final and ready to download. Comments are welcome: [email protected]