Description

GEOGLOWS is the Group on Earth Observation's Global Water Sustainability Program. It coordinates efforts from public and private entities to make application ready river data more accessible and sustainably available to underdeveloped regions. The GEOGLOWS Hydrological Model provides a retrospective and daily forecast of global river discharge at 7 million river sub-basins. The stream network is a hydrologically conditioned subset of the TDX-Hydro streams and basins data produced by the United State's National Geospatial Intelligence Agency. The daily forecast provides 3 hourly average discharge in a 51 member ensemble and 15 day lead time derived from the ECMWF Integrated Forecast System (IFS). The retrospective simulation is derived from ERA5 climate reanalysis data and provides daily average streamflow beginning on 1 January 1940. New forecasts are uploaded daily and the retrospective simulation is updated weekly on Sundays to keep the lag time between 5 and 12 days.

The geoglows-v2 bucket contains: (1) model configuration files used to generate the simulations, (2) the GIS streams datasets used by the model, (3) the GIS streams datasets optimized for visualizations used by Esri's Living Atlas layer, (4) several supporting table of metadata including country names, river names, hydrological properties used for modeling.

The geoglows-v2-forecasts bucket contains: (1) daily 15 forecasts in zarr format optimized for time series queries of all ensemble members in the prediction, (2) CSV formatted summary files optimized for producing time series animated web maps for the entire global streams dataset.

The geoglows-v2-retrospective bucket contains: (1) the model retrospective outputs in (1a) zarr format optimized for time series queries of up to a few hundred rivers on demand as well as (1b) in netCDF format best for bulk downloading the dataset, (2) estimated return period flows for all 7 million million rivers (2a) in zarr format optimized for reading subsets of the dataset as well as (2b) in netCDF format best for bulk downloading. (3) The initialization files produced at the end of each incremental simulation useful for restarting the model from a specific date.

Update Frequency

Monthly

License

Creative Commons BY 4 (CC BY 4.0)

Documentation

https://data.geoglows.org

Managed By

Riley Hales

See all datasets managed by Riley Hales.

Contact

https://groups.google.com/g/geoglows

How to Cite

GEOGLOWS Hydrological Model Version 2 was accessed on DATE from https://registry.opendata.aws/geoglows-v2. https://doi.org/10.1111/jfr3.12859

Usage Examples

Tutorials

• Access GEOGLOWS retrospective simulation data from AWS S3 by Riley Hales
  
  S3
• Access GEOGLOWS river forecast data from AWS S3 by Riley Hales
  
  S3
• Bulk Download and Query simulation netCDF Files by Riley Hales
  
  S3
• Finding River Numbers by Riley Hales
  
• GEOGLOWS V2 Tutorials by Riley Hales
  

Tools & Applications

• GEOGLOWS Hydroviewer by Riley Hales
  
• pygeoglows by Riley Hales
  

Publications

• Advancing global hydrologic modeling with the GEOGloWS ECMWF streamflow service by Hales et al.