Colorado HydroBase / CDSS
Colorado's Decision Support Systems database containing water rights, structures, diversion records, irrigated lands, streamflow, and reservoir storage data for Colorado, with programmatic REST web services.
cdss.colorado.gov
At a glance
- Region
- United States (North America)
- Coverage
- Regional
- Access
- Free
- Category
- Government
- Last updated
- 2026
What's inside
- Diversion records
- Irrigated lands
- Water rights
- Streamflow
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
Irrigation scheduling
Decide when and how much to irrigate.
Because it has: Irrigated lands
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
Field-scale ET
Estimate crop water use per field by combining satellite and weather with ML.
Machine access and documentation
Open API
CDSS REST web services provide HydroBase diversions/irrigated-lands data (API key for higher limits)
Licence: Open data
Listed in our registry of open water APIs, which WaterDataGPT can query live.
Related water data
- Colorado DSS / CDSS Data and ToolsNorth America | Free
- Colorado DWR CDSS REST Web Services (HydroBase)North America | Free
- Idaho Department of Water Resources Open DataNorth America | Free
- CAMELS (US): Catchment Attributes and Meteorology for Large-sample StudiesNorth America | Free
- CAMELSH: Large-sample hourly hydrometeorological dataset for CONUS (OSTI record)North America | Free
- Delaware River Basin CommissionNorth America | Free
Find more water data
Search and compare 1,900+ water data sources by region, type and access.