Delta Hydro Studio
FreemiumVerified
Browser-based hydrology and hydraulics calculators for practising engineers — no install, report-ready output.
8 tools · Topic
Flood Frequency Analysis Software
Fitting distributions to annual maxima — Log-Pearson III under Bulletin 17C, GEV elsewhere — is core design hydrology. The list includes USGS PeakFQ and HEC-SSP for Bulletin 17C analyses, the fasstr R package for Canadian records, a browser tool for fitting rainfall distributions, and USGS StreamStats for regression-based flood statistics at ungauged US sites.
Browser-based rainfall frequency analysis — fit and rank 11 distributions with confidence intervals.
HEC-SSP
Free
Statistical hydrology from HEC: Bulletin 17C flood frequency, volume-duration and general frequency analysis.
PeakFQ
Gov-Public
USGS software for Bulletin 17C flood-frequency analysis of annual peak-flow records.
RainyDay
Open Source
Stochastic storm transposition in Python — probabilistic extreme rainfall scenarios from remote-sensing data.
USGS Hydrologic Toolbox
Gov-Public
USGS's merged surface-water and groundwater statistics program — baseflow separation, flow duration, low flows.
USGS StreamStats
Gov-Public
USGS web tool for basin delineation and regression-based flow statistics at any US stream point.
fasstr
Open Source
Canadian government R package for streamflow analysis — trends, frequencies and summaries from HYDAT.