What is Design Rainfall?
Depth–duration–frequency (DDF) estimates and IDF-style curves from regional models and international datasets, plus user data import where needed.
When would you use this?
- Any study that needs consistent design storm depths across durations.
- Comparing published regional models with local observations.
How Delta Hydro Studio handles it
- Supports South African regional models alongside global references.
- Outputs structured for direct use in hydrology and hydraulic tools.
How to use it
- 1
Pick your location or catchment centroid.
- 2
Select the rainfall model source appropriate to the study.
- 3
Generate depth–duration tables and curves for your return periods.
- 4
Push results into rational, TR-55, or storm generator workflows.
Methodology & references
Full equations, assumptions, and literature references appear inside the in-app methodology panels for this tool, aligned with South African guidance (SANRAL TRH, SANCOLD, DWS technical manuals) and international references (USDA NRCS, FHWA HDS) where applicable.
Outputs & exports
Export professional Word and Excel report packs, tabulated results, and GIS-friendly layers depending on the tool. Screenshots in marketing materials are refreshed as the UI evolves — the studio always reflects the latest layout.
Ready to run Design Rainfall?
Free tier available — no credit card required to explore.