Baseline river hydrography, catchment drainage fabric and flow accumulation — HydroSHEDS, HydroRIVERS and MERIT-Hydro
- Outcome
- Completed
- Search date
- Source
- WWF, McGill University & University of Tokyo
- Reference
- RUN-20260915-059
- Aim
- Recover standardized global vector river networks, Strahler stream order hierarchies, and 90m flow accumulation grids for hydrological delineation of the transboundary Trishuli catchment.
- Source and interface
- WWF, McGill University & University of Tokyo — HydroSHEDS Portal & MERIT-Hydro Data Repository
- Search method
- Query HydroSHEDS and HydroRIVERS v1.0 vector database for South Asia river reach lines intersecting the Narayani / Trishuli basin; query MERIT-Hydro (Yamazaki et al.) repository for tile n25e085 flow direction (flw) and flow accumulation (upa) rasters. Retrieve authoritative digital drainage network assets.
- Criteria
Criterion South Asia regional extract, bounding Trishuli and Bhote Koshi catchments. Standardized hydrological fabric. - Coverage
- Continuous vector river reach geometry, upstream contributing catchment area, stream gradient, and flow routing topology across Tibet and Nepal.
- Stopping rule
- Exhaust catalogued river reach vectors and flow direction grids covering the full catchment extent.
- Result
2 digital hydrography collections recovered across 4 assets: HydroRIVERS / HydroBASINS standardized vector river network and MERIT-Hydro 90m flow routing rasters.
Resource links below show the completed assessment outcomes. The search result above records discovery at the search date.
HydroRIVERS and HydroBASINS regional hydrography collections