MERIT-DrainAttr: Baseline drainage attributes for the global 90 m drainage network

📂 Baseline hydrography: get it from MERIT Hydro This record holds only layers derived from MERIT Hydro. The baseline hydrography — DEM, flow direction, flow accumulation — comes from MERIT Hydro (global-hydrodynamics.github.io/MERIT_Hydro; Yamazaki et al., 2019). Every raster here is on the same 3 arcsec grid, so a MERIT Hydro tile lines up with these layers pixel for pixel; fullhydro.org lists the tiles each region needs. Licence: CC BY 4.0. Four baseline drainage attributes of the global 90 m MERIT Hydro drainage network (22.2 billion land pixels): flow length downstream, flow length upstream, Strahler stream order, and upstream drainage area. These are the standard outputs of flow-routing kernels, computed with the topological structures of the companion record MERIT-FlowTopo (doi:10.5281/zenodo.20653058) and released as ready-to-use rasters. Derived from MERIT Hydro (Yamazaki et al., 2019; doi:10.1029/2019WR024873), not redistributed here. Variables Per-region GeoTIFF (ZSTD-19), for 65 hydrologically independent regions: Variable Description Type / unit Coverage ldn flow length downstream Float32, km all 65 regions lup flow length upstream Float32, km all 65 regions ord Strahler stream order (network at upstream-area ≥ 10 km²) UInt8 all 65 regions upa upstream drainage area Float32, km² region 43 only Each region_000XX.zip holds three variables; region_00043.zip holds four (adds upa). Global upstream drainage area is already distributed with MERIT Hydro, so it is not duplicated here. See MERIT-DrainAttr_README.md for full documentation. Grid: 1/1200° (≈ 90 m), WGS84. ≈ 622 GB uncompressed, ≈ 60 GB compressed. Files in this record File Description region_000XX.zip (×64) ldn + lup + ord region_00043.zip ldn + lup + ord + upa MANIFEST.txt list of every data ZIP with size MERIT-DrainAttr_README.md full documentation Related records MERIT-FlowTopo (the traversal structures these were computed from) — doi:10.5281/zenodo.20653058 MERIT-FlowTopo code (the C implementation, the figure scripts, and the Python package) — doi:10.5281/zenodo.22227621 FlowTopo in Python (same method, MIT) — github.com/hellolulujiang/flowtopo MERIT-FullBasin (the region partition) — doi:10.5281/zenodo.20344112 MERIT Hydro (input flow direction) — doi:10.1029/2019WR024873