WINFAP-FEH 3.0

WINFAP-FEH is a Windows-based application from Wallingford HydroSolutions for flood frequency analysis using the Flood Estimation Handbook (FEH) statistical methods. It enables hydrologists and engineers to estimate design peak flows at both gauged and ungauged river sites across the United Kingdom, following accepted FEH procedures and professional practice.

Key features:

• Single-site and pooled frequency analysis using FEH-compliant methods and L-moment statistics
• QMED estimation with options for donor transfer and urbanization adjustments, plus derivation of growth curves and return-period peak flows
• Support for annual maxima (AMAX) and peaks-over-threshold (POT) series, including data screening, outlier treatment, and quality checks
• Tools to build and refine pooling groups with diagnostics that assess suitability and influence of stations
• Clear tables and frequency plots with uncertainty measures, plus export options for reporting and audit
• Project-based workflows that capture inputs, settings, and method choices for transparent, reproducible studies

Who uses it:

• Consulting engineers, flood risk analysts, regulators, and researchers conducting FEH-based flood estimates and reporting.

WINFAP-FEH is developed by Wallingford HydroSolutions. The most popular versions of this product among our users are: 1.0, 2.0 and 3.0. The name of the program executable file is WINFAP-FEH.exe.