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deltares-water-availability.md

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Deltares Global Water Availability

Overview

Deltares 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 model. The model outputs long-term daily information on reservoir volume, inflow and outflow dynamics, as well as information on upstream hydrological forcing.

They 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.

See the complete methodology documentation for more information.

Storage resources

Data are stored in netCDF files in Azure Blob Storage in the West Europe Azure region, in the following folder:

https://deltaresreservoirssa.blob.core.windows.net/reservoirs/v2021.12/

Within that folder, data files are organized according to the precipitation product used as the model forcing function, using the following structure:

reservoirs_[name], where name can be one of: ERA5, CHIRPS, EOBS, NLDAS, or BOM.

A fully constructed path would look like this:

https://deltaresreservoirssa.blob.core.windows.net/reservoirs/v2021.12/reservoirs_BOM.nc

Dataset coverages

Name Scale Period Number of basins
ERA5 Global 1967-2020 3236
CHIRPS Global (+/- 50 latitude) 1981-2020 2951
EOBS Europe/North Africa 1979-2020 682
NLDAS USA 1979-2020 1090
BOM Australia 1979-2020 116

File contents

Dimension

Name Description
time Daily timesteps corresponding to period
GrandID GrandID number of the reservoir of interest
Ksathorfrac Five different value lateral anisotropy values used

Variables

Variable Description
P Average precipitation upstream of reservoir (mm per day)
Eta Average simulated actual evapotransporation upstream of reservoir (mm per day)
Snow Average simulated snow depth upstream of reservoir (mm)
Melt Average simulated snow melt upstream of reservoir mm per day)
Temp Average surface temperature upstream of reservoir (degrees C)
P_res Average precipitation into reservoir (mm per day)
Ea_res Average simulated actual evapotransporation out of reservoir (mm per day)
Qout_res Simulated reservoir outflow (m3 per s)
Qin_res Simulated reservoir inflow (m3 per s)
S_res Simulated reservoir volume (m3)
FracFull Simulated reservoir storage fraction of being full (-)

Sample code

A complete Python example of accessing and plotting water availability data is available in the accompanying sample notebook.

Contact

For questions about this dataset, contact aiforearthdatasets@microsoft.com.

Notices

Microsoft provides this dataset on an "as is" basis. Microsoft makes no warranties (express or implied), guarantees, or conditions with respect to your use of the dataset. To the extent permitted under your local law, Microsoft disclaims all liability for any damages or losses - including direct, consequential, special, indirect, incidental, or punitive - resulting from your use of this dataset. This dataset is provided under the original terms that Microsoft received source data.