ARR Data Hub
Gov-Public
The official portal for Australian Rainfall & Runoff design inputs — losses, temporal patterns and preburst.
Data, Monitoring & ForecastingActiveIDF CurvesDesign Storms
12 tools · Topic
Design Storm Generators
From SCS Type II distributions to Chicago storms and ARR ensembles, design storm construction is a small task that hides many regional conventions. The tools below generate design hyetographs for the standards you are working under, ready to feed into HEC-HMS, SWMM or your own scripts.
Browser-based rainfall frequency analysis — fit and rank 11 distributions with confidence intervals.
Hydrology & Catchment AnalysisActiveFlood Frequency AnalysisIDF Curves
HEC-HMS
FreeVerified
The US Army Corps standard for rainfall-runoff modelling — event and continuous simulation, free to use.
Hydrology & Catchment AnalysisActiveHEC-HMSSCS Curve Number
NEOPRENE
Open Source
Neyman-Scott stochastic rainfall generation in Python — synthetic series and disaggregation, single or multi-site.
Climate & Change AnalysisActiveRainfall DataDesign Storms
NOAA Atlas 14 (PFDS)
Gov-Public
The US precipitation-frequency standard — point rainfall depths for any duration and return period, free.
Data, Monitoring & ForecastingActiveIDF CurvesRainfall Data
NetSTORM
Free
CDM Smith's free rainfall statistics and STORM-method screening model — IDF analysis, disaggregation, CSO planning.
Urban Stormwater & InfrastructureActiveIDF CurvesRainfall Data
RainyDay
Open Source
Stochastic storm transposition in Python — probabilistic extreme rainfall scenarios from remote-sensing data.
Hydrology & Catchment AnalysisActiveDesign StormsFlood Frequency Analysis
SWMM-CAT
Gov-Public
EPA's Climate Adjustment Tool for SWMM — apply downscaled climate projections to rainfall and evaporation inputs.
Climate & Change AnalysisStableClimate ProjectionsSWMM
StormHub
Open Source
Dewberry's open tool for building STAC catalogs of storms and gauge data — inputs for stochastic storm transposition.
Data, Monitoring & ForecastingActiveRainfall DataDesign Storms
WBNM
Free
The Watershed Bounded Network Model — free Australian runoff-routing hydrology for flood estimation.
Hydrology & Catchment AnalysisStableFlood RoutingDesign Storms
Free web tool for building synthetic design-storm patterns — 560+ temporal patterns, exportable to SWMM and HMS.
Urban Stormwater & InfrastructureActiveDesign StormsIDF Curves
hms-commander
Open Source
Python automation for HEC-HMS — batch and parallel runs, design storms, and DSS handoff to HEC-RAS.
Hydrology & Catchment AnalysisActiveHEC-HMSPython Hydrology