What is Index Flood Method?
Regional frequency analysis using the index-flood approach — combine site and regional information for robust estimates where data is sparse.
When would you use this?
- Ungauged catchments where at-site data is insufficient on its own.
- Regional studies that need consistent dimensionless growth curves.
How Delta Hydro Studio handles it
- Transparent handling of regional and at-site information.
- Pairs with gauge discovery and flood frequency outputs.
How to use it
- 1
Prepare your site statistics and regional pool inputs.
- 2
Configure the index flood model parameters.
- 3
Run the analysis and review growth factors.
- 4
Export results alongside your catchment description.
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 Index Flood Method?
Free tier available — no credit card required to explore.