Delta Hydro Studio
FreemiumVerified
Browser-based hydrology and hydraulics calculators for practising engineers — no install, report-ready output.
USGS StreamStats
ActiveUSGS web tool for basin delineation and regression-based flow statistics at any US stream point.
by US Geological Survey
- Pricing
- Gov-Public
- License
- US Government (public domain)
- Commercial use
- Permitted
- Ecosystem
- Browser, REST API
- Platform
- Web
About USGS StreamStats
StreamStats delineates the drainage basin above any point on a US stream, computes basin characteristics, and applies the USGS regional regression equations to estimate peak-flow frequencies and other streamflow statistics — the standard first stop for ungauged-site design flows in the United States.
Output is report-ready and citable, and underlying services are accessible programmatically. Coverage and available statistics vary by state (each state's regressions were developed separately), so check the documentation for your study area. Outside the US, national equivalents differ; the regression-on-basin-characteristics pattern is universal.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Alternatives to USGS StreamStats
Ranked by the topics, categories and workflow stages they share with USGS StreamStats.
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USGS software for Bulletin 17C flood-frequency analysis of annual peak-flow records.
USGS Hydrologic Toolbox
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USGS's merged surface-water and groundwater statistics program — baseflow separation, flow duration, low flows.
QSWAT+
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The QGIS interface for SWAT+ — delineate, discretise and build a watershed model without leaving the GIS.
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Fast global watershed delineation in Python — the MERIT-Hydro engine behind the Global Watersheds web app.
pysheds
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Watershed delineation in pure Python — DEM conditioning to catchment boundary in a dozen lines.