Colorado's sub-basin-level Surface Water Supply Index (SWSI) data compares current water volumes to historical years. The dataset includes monthly SWSI values, forecasts, streamflow, and reservoir storage for river basins and sub-basins. It is provided by data.colorado.gov and was last updated in April 2026.
Use Cases
- Forecast SWSI values for a HUC8 using Report Month, Report Year, and Forecasted Runoff NEP features.
- Analyze trends in water supply by comparing SWSI and SWSI Previous Year columns across multiple Report Years.
- Model the relationship between Reservoir Storage NEP, Stream Flow NEP, and the resulting SWSI value.
- Identify basins with significant water supply changes using the Change from Previous Year and Basin columns.
Strengths
- Includes 12 distinct columns covering index values, forecasts, and component metrics.
- Provides data at the HUC8 sub-basin level for granular spatial analysis in Colorado.
Limitations
- The total number of rows and historical time range are unknown, limiting assessment of temporal coverage.
- Sample data is unavailable, preventing verification of data distributions and value ranges.
Provenance
- Source
- data.colorado.gov
- Collection Method
- Calculated index combining streamflow, streamflow forecast, and reservoir storage volumes.
- Time Range
- null
- Freshness
- Last updated on 2026-04-03.
- Geography
- River basins and sub-basins (HUC8) within Colorado, USA.