{"id":"deltares-water-availability","type":"Collection","links":[{"rel":"items","type":"application/geo\u002Bjson","href":"https://planetarycomputer.microsoft.com/api/stac/v1/collections/deltares-water-availability/items"},{"rel":"parent","type":"application/json","href":"https://planetarycomputer.microsoft.com/api/stac/v1/"},{"rel":"root","type":"application/json","href":"https://planetarycomputer.microsoft.com/api/stac/v1/"},{"rel":"self","type":"application/json","href":"https://planetarycomputer.microsoft.com/api/stac/v1/collections/deltares-water-availability"},{"rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables","type":"application/schema\u002Bjson","title":"Queryables","href":"https://planetarycomputer.microsoft.com/api/stac/v1/collections/deltares-water-availability/queryables"}],"title":"Deltares Global Water Availability","assets":{"thumbnail":{"href":"https://ai4edatasetspublicassets.azureedge.net/assets/pc_thumbnails/additional_datasets/deltares-reservoir.jpg","type":"image/png","roles":["thumbnail"],"title":"Thumbnail"},"geoparquet-items":{"href":"abfs://items/deltares-water-availability.parquet","type":"application/x-parquet","roles":["stac-items"],"title":"GeoParquet STAC items","description":"Snapshot of the collection\u0027s STAC items exported to GeoParquet format.","table:storage_options":{"account_name":"pcstacitems"}}},"extent":{"spatial":{"bbox":[[-180,90,180,-90]]},"temporal":{"interval":[["1970-01-01T00:00:00Z","2020-12-31T00:00:00Z"]]}},"license":"CDLA-Permissive-1.0","keywords":["Deltares","Water availability","Reservoir","Water","Precipitation"],"providers":[{"url":"https://www.deltares.nl/en/","name":"Deltares","roles":["producer"]},{"url":"https://planetarycomputer.microsoft.com/","name":"Microsoft","roles":["host"]}],"summaries":{"deltares:reservoir":["ERA5","CHIRPS","EOBS","NLDAS","BOM"]},"description":"[Deltares](https://www.deltares.nl/en/) has produced a hydrological model approach to simulate historical daily reservoir variations for 3,236 locations across the globe for the period 1970-2020 using the distributed [wflow_sbm](https://deltares.github.io/Wflow.jl/stable/model_docs/model_configurations/) model. The model outputs long-term daily information on reservoir volume, inflow and outflow dynamics, as well as information on upstream hydrological forcing.\n\nThey hydrological model was forced with 5 different precipitation products. Two products (ERA5 and CHIRPS) are available at the global scale, while for Europe, USA and Australia a regional product was use (i.e. EOBS, NLDAS and BOM, respectively). Using these different precipitation products, it becomes possible to assess the impact of uncertainty in the model forcing. A different number of basins upstream of reservoirs are simulated, given the spatial coverage of each precipitation product.\n\nSee the complete [methodology documentation](https://ai4edatasetspublicassets.blob.core.windows.net/assets/aod_docs/pc-deltares-water-availability-documentation.pdf) for more information.\n\n## Dataset coverages\n\n| Name   | Scale                    | Period    | Number of basins |\n|--------|--------------------------|-----------|------------------|\n| ERA5   | Global                   | 1967-2020 | 3236             |\n| CHIRPS | Global (\u002B/- 50 latitude) | 1981-2020 | 2951             |\n| EOBS   | Europe/North Africa      | 1979-2020 | 682              |\n| NLDAS  | USA                      | 1979-2020 | 1090             |\n| BOM    | Australia                | 1979-2020 | 116              |\n\n## STAC Metadata\n\nThis STAC collection includes one STAC item per dataset. The item includes a \u0060deltares:reservoir\u0060 property that can be used to query for the URL of a specific dataset.\n\n## Contact\n\nFor questions about this dataset, contact [\u0060aiforearthdatasets@microsoft.com\u0060](mailto:aiforearthdatasets@microsoft.com?subject=deltares-floods%20question).","item_assets":{"data":{"type":"application/x-netcdf","roles":["data"],"title":"Flood Map","description":"Inundation maps of flood depth using a model that takes into account water level attenuation and is forced by sea level.","storage:refs":["azure"]},"index":{"type":"application/json","roles":["index"],"title":"Index file","description":"Kerchunk index file.","storage:refs":["azure-deltaresreservoirssa-references"]}},"msft:region":"westeurope","stac_version":"1.0.0","msft:_created":"2026-10-12T16:21:26.0121535Z","msft:_updated":"2026-10-29T23:26:01.851879Z","cube:variables":{"P":{"type":"data","unit":"mm per day","attrs":{"units":"mm per day","description":"Average precipitation upstream of reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Average precipitation upstream of reservoir"},"ETa":{"type":"data","unit":"mm per day","attrs":{"units":"mm per day","description":"Average simulated actual evapotransporation upstream of reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Average simulated actual evapotransporation upstream of reservoir"},"PET":{"type":"data","unit":"mm per day","attrs":{"units":"mm per day","description":"Average potential evapotranspiration upstream of reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Average potential evapotranspiration upstream of reservoir"},"Melt":{"type":"data","unit":"mm per day","attrs":{"units":"mm per day","description":"Average simulated snow melt upstream of reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Average simulated snow melt upstream of reservoir"},"Snow":{"type":"data","unit":"mm","attrs":{"units":"mm","description":"Average simulated snow depth upstream of reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Average simulated snow depth upstream of reservoir"},"Temp":{"type":"data","unit":"degrees C","attrs":{"units":"degrees C","description":"Average surface temperature upstream of reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Average surface temperature upstream of reservoir"},"P_res":{"type":"data","unit":"mm per day","attrs":{"units":"mm per day","description":"Precipitation reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Precipitation reservoir"},"S_res":{"type":"data","unit":"m3","attrs":{"units":"m3","description":"Simulated reservoir volume"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Simulated reservoir volume"},"Ea_res":{"type":"data","unit":"mm per day","attrs":{"units":"mm per day","description":"Simulated actual evaporation reservoir"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Simulated actual evaporation reservoir"},"Qin_res":{"type":"data","unit":"m3 per s","attrs":{"units":"m3 per s","description":"Simulated reservoir inflow (surface\u002Bsubsurface)"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Simulated reservoir inflow (surface\u002Bsubsurface)"},"FracFull":{"type":"data","unit":"m3","attrs":{"units":"m3","description":"Simulated reservoir volume"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Simulated reservoir volume"},"Qout_res":{"type":"data","unit":"m3 per s","attrs":{"units":"m3 per s","description":"Simulated reservoir outflow"},"dimensions":["time","GrandID","ksathorfrac"],"description":"Simulated reservoir outflow"},"latitude":{"type":"data","unit":"degrees","attrs":{"units":"degrees","description":"Latitude of reservoir"},"dimensions":["GrandID"],"description":"Latitude of reservoir"},"longitude":{"type":"data","unit":"degrees","attrs":{"units":"degrees","description":"Longitude of reservoir"},"dimensions":["GrandID"],"description":"Longitude of reservoir"}},"msft:container":"reservoirs","cube:dimensions":{"time":{"step":"P1DT0H0M0S","type":"temporal","extent":[null,"2020-12-31T00:00:00Z"]},"GrandID":{"type":"identifier","extent":[null,null],"description":"GrandID number of the reservoir of interest"},"ksathorfrac":{"type":"level","values":[5,20,50,100,250],"description":"Five different value lateral anisotropy values used"}},"stac_extensions":["https://stac-extensions.github.io/datacube/v2.2.0/schema.json","https://stac-extensions.github.io/storage/v2.0.0/schema.json"],"storage:schemes":{"azure":{"type":"ms-azure","region":"westeurope","account":"deltaresreservoirssa","platform":"https://{account}.blob.core.windows.net","container":"reservoirs"},"azure-deltaresreservoirssa-references":{"type":"ms-azure","account":"deltaresreservoirssa","platform":"https://{account}.blob.core.windows.net","container":"references"}},"msft:storage_account":"deltaresreservoirssa","msft:short_description":"Historical daily reservoir variations."}