Flood Risk Assessment & SAB Support

We deliver Flood Risk Assessments (FRAs) and mitigation strategies to support planning applications, manage water-related risks, and unlock development potential. Whether you’re designing housing, infrastructure or commercial schemes, we provide regulator-aligned reports tailored to your site and sector.

Waterco Datrys

Flood Risk Assessment

Local Authorities are under pressure as the frequency and intensity of flooding increases, resulting in a greater demand for Flood Risk Assessment reports to support planning applications.

In addition, home and business owners who have experienced flooding want to know the probability of such a flood recurring and they too need access to FRA reports.

Waterco Datrys

S19 Flood Investigation Report

Under the Flood and Water Management Act (FWMA), Lead Local Flood Authorities (LLFAs) must investigate significant flood events and publish Section 19 reports. We deliver these in‑depth investigations using hydraulic modelling and flood assessment to establish causes, impacts and responsibilities.

Our reports provide evidence‑based recommendations that strengthen resilience, inform future planning and support compliance with FCERM requirements.

Hydraulic & Hydrological Modelling

Advanced analysis of flood mechanisms to understand event dynamics and contributing factors.

Impact Recording

Detailed assessment of affected properties, infrastructure and community disruption.

Stakeholder Engagement

Collaboration with RMAs, local authorities and communities to ensure accurate findings and practical solutions.

Evidence‑Based Reporting

Clear documentation of responsibilities, actions taken and recommendations to guide future flood risk management.

Waterco Datrys

SuDS Approval Body (SAB) Support

Local Authorities in Wales are responsible for assessing SuDS Approval Body (SAB) applications under Schedule 3 of the Flood & Water Management Act.

Waterco Datrys are engaged and utilised by various Local Authorities as trusted, independent third‑party assessors. We provide impartial technical expertise to support councils in delivering thorough, consistent and compliant assessments.

Waterco Datrys

Hydraulic Modelling

Hydraulic modelling allows us to explore a range of ‘what if’ scenarios, helping local authorities and public/private sector plan effective flood mitigation and drainage strategies.

By simulating the flow, volume and velocity of water through rivers, streams, floodplains, drainage systems and coastal areas we provide previse actionable insights for both current and future challenges.

Our Work

Case Studies

Flood Risk Assessment and SAB Support Team

Frequently Asked Questions

Which Lead Local Flood Authorities have you worked with?

With over 20 years’ experience, we’ve partnered with Lead Local Flood Authorities (LLFAs) across the UK to secure funding, investigate flood events, develop drainage strategies, and reduce flood risk under the Flood and Water Management Act 2010.

Our experience includes work with Denbighshire County Council, Flintshire County Council, St. Helens Council, Cheshire Council, Gwynedd Council and Derbyshire Council.