Delta Hydro Studio
FreemiumVerified
Browser-based hydrology and hydraulics calculators for practising engineers — no install, report-ready output.
USGS Hydrologic Toolbox
ActiveUSGS's merged surface-water and groundwater statistics program — baseflow separation, flow duration, low flows.
by US Geological Survey
- Pricing
- Gov-Public
- License
- US Government (public domain)
- Commercial use
- Permitted
- Ecosystem
- Standalone
- Platform
- Windows
About USGS Hydrologic Toolbox
The Hydrologic Toolbox consolidates two long-serving USGS programs — the Surface-Water Toolbox and Groundwater Toolbox — into one Windows application for streamflow-record analysis: baseflow separation by the standard methods (BFI, HYSEP, PART), flow-duration curves, n-day low-flow and high-flow frequency statistics, trend tests and recession analysis, with direct retrieval of USGS gauge data built in.
These are the statistics that water-supply assessments, low-flow permitting and baseflow studies actually report, computed by the agency's own reference implementations. For scripted equivalents, R and Python packages cover much of the same ground; the Toolbox remains the citable point-and-click standard.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Alternatives to USGS Hydrologic Toolbox
Ranked by the topics, categories and workflow stages they share with USGS Hydrologic Toolbox.
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USGS software for Bulletin 17C flood-frequency analysis of annual peak-flow records.
USGS StreamStats
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USGS web tool for basin delineation and regression-based flow statistics at any US stream point.
fasstr
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Canadian government R package for streamflow analysis — trends, frequencies and summaries from HYDAT.
Caravan
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The open global large-sample hydrology dataset — thousands of catchments with forcing, attributes and streamflow.
StormHub
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Dewberry's open tool for building STAC catalogs of storms and gauge data — inputs for stochastic storm transposition.