NOTICE: In January 2020, USGS WaterWatch began operating in maintenance-only mode. Existing tools, features, and web data services are being fully maintained as before, but new tools and enhancements will no longer be developed. Please contact USGS WaterWatch if you have any questions.
USGS Streamflow Duration Hydrograph Builder
Site Number Year:   No. of years:  
5th and 95th percentiles: Year Type:   Output:
Select streamflow years and styles:

Year 1:
Year 2:
Critical flows:
Position: Color band transparency (0-1):

For some streams, flow statistics may have been computed from mixed regulated
and unregulated flows; this can affect depictions of flow conditions.

Duration Hydrograph
Duration hydrograph legend

Additional Information