What is Flood Frequency Analysis?
Fit and compare frequency distributions (LP3, GEV, Gumbel, Normal, and more) using method of moments, L-moments, and MLE with best-fit ranking.
When would you use this?
- Gauge-based flood frequency for design events or calibration of regional models.
- Comparing multiple distributions for sensitivity and regulatory defensibility.
How Delta Hydro Studio handles it
- Several fitting methods and distributions in one comparison view.
- Designed for professional QA — not a toy spreadsheet macro.
How to use it
- 1
Import or select your annual maximum series.
- 2
Choose candidate distributions and fitting methods.
- 3
Compare goodness-of-fit and pick a defensible model.
- 4
Export quantiles and plots for appendices and peer review.
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 Flood Frequency Analysis?
Free tier available — no credit card required to explore.