NASA GSFC Global Water Monitoring (GWM) - Lakes and Reservoirs
NASA Goddard portal providing satellite-altimetry-derived water level deviations and lake-extent products for operational lakes and reservoirs worldwide, at 10-day and monthly resolution, with downloadable Excel/PDF tables and tar.gz archives. Integrates TOPEX/Poseidon, Jason, Sentinel-3, SWOT and ICESat-2.
earth.gsfc.nasa.gov
At a glance
- Region
- United States (Global)
- Coverage
- Global
- Access
- Free
- Category
- Space Agency
- Last updated
- 2026
What's inside
- water levels
- lake extent
- altimetry
- reservoir storage
What you can do with it
Typical work that data of this type supports.
- 01
Storage tracking
Follow storage and releases through the season.
Because it has: water levels
- 02
Change over time
See how lakes and wetlands have grown or shrunk.
- 03
No-gauge areas
Monitor places with no ground stations.
Because it has: altimetry
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Storage from space
Estimate volume from satellite water area and altimetry.
- 02
Release decisions
Optimise releases against inflow forecasts.
- 03
Segmentation
Map water, crops and land use pixel by pixel with deep learning.
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- Adventure Scientists Global Microplastics InitiativeGlobal | Free
- APDRC CPC Global Daily PrecipitationGlobal | Free
- APDRC GPCP Merged Daily Precipitation v1.1Global | Free
- APDRC NOAA-CIRES-DOE 20th Century Reanalysis V3Global | Free
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