ARR Data Hub
Gov-Public
The official portal for Australian Rainfall & Runoff design inputs — losses, temporal patterns and preburst.
Data, Monitoring & ForecastingActiveIDF CurvesDesign Storms
6 tools · Topic
Rainfall IDF Curve Tools & Data
Intensity-duration-frequency curves are the bridge between rainfall statistics and design flows. This page indexes tools for fitting IDF curves from gauge records, accessing published IDF data (NOAA Atlas 14 and regional equivalents), and generating the design intensities your drainage calcs consume.
Browser-based rainfall frequency analysis — fit and rank 11 distributions with confidence intervals.
Hydrology & Catchment AnalysisActiveFlood Frequency AnalysisIDF Curves
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
SWMM-CAT
Gov-Public
EPA's Climate Adjustment Tool for SWMM — apply downscaled climate projections to rainfall and evaporation inputs.
Climate & Change AnalysisStableClimate ProjectionsSWMM
Free web tool for building synthetic design-storm patterns — 560+ temporal patterns, exportable to SWMM and HMS.
Urban Stormwater & InfrastructureActiveDesign StormsIDF Curves