WMO Hydrological Observing System (WHOS)
WMO brokering framework and global portal federating hydrological data (streamflow, water level, precipitation, water quality time series) from national hydrological services worldwide via standardized APIs (WaterOneFlow/WaterML, OGC SOS, CSW/WMS, DAB, USGS RDB, THREDDS).
hydrohub.wmo.int
At a glance
- Region
- Global
- Coverage
- Global (federated national hydrological services)
- Access
- Free
- Category
- Government
What's inside
- Streamflow
- Water Levels
- Precipitation
- Water Quality
- Hydrological Time Series
Terms explained
What you can do with it
Typical work that data of this type supports.
- 01
Design flows
Estimate 1-in-50 and 1-in-100 year floods for bridges, culverts and spillways.
Because it has: Streamflow
- 02
Low flows
Set environmental flows and check what is left in the river in a dry year.
- 03
Design storms
Build rainfall intensity-duration-frequency curves for drainage design.
Because it has: Precipitation
Where AI adds value
Ideas for machine learning and AI agents built on this kind of data.
- 01
Flow forecasting
Train LSTM-style models on past records to forecast river levels and flow days ahead.
- 02
Ungauged basins
Combine with catchment data to estimate flow where there is no gauge.
- 03
Downscaling
Turn coarse rainfall grids into field or ward scale estimates.
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