WINFAPWINFAP 4 enables you to estimate peak flows and flood frequency curves for gauged and ungauged catchments, using the latest Flood Estimation Handbook (FEH) methods.

At an ungauged site you can automatically create a pooling group of similar gauged sites based on comparison of FEH Web Service catchment descriptors.

At a gauged site you can apply flood frequency analysis techniques to gauged annual maximum and/or peaks-over-threshold flood peak data where available. Flood frequency curves are created by analysis of the pooling group flood peak data.

WINFAP 4 was developed by WHS to implement a range of the industry-standard FEH statistical analysis tools. It uses the latest FEH methods to provide estimates of peak flows and flood frequency curves for gauged and ungauged catchments and supersedes WINFAP-FEH 3.

See What’s new in WINFAP 4? and In-depth for additional functionality and significant improvements over previous versions, including scientific advances as developed by Kjeldsen et al (2008).

WINFAP 4 is available on an annual subscription, activated online with a serial number. See Licensing for details.

COVID-19 Support – With the impact of the COVID-19 (Coronavirus) outbreak being felt by businesses across the UK, many people will require a period working from home. Please see our COVID-19 Support Page for further information.

Current WINFAP Offers

Existing WINFAP-FEH 3 customer? We’re pleased to offer a free 1 year WINFAP 4 subscription for you and up to 4 of your colleagues. To take advantage of this offer, please Contact Us to arrange this, including posting back your WINFAP-FEH 3 dongle.

Five WINFAP 4 Licence Deal – For every 5 WINFAP 4 licenses purchased, you will receive one of these licenses for free. The discount will be applied automatically to your basket.