Flood Risk

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

A Flood Risk Assessment (FRA) is a method of analysing a variety of data and factors to assess the likelihood of future flooding and to give information about the sorts of measures that will help to minimise the effects should flooding occur.

Our reports include site-specific modelling, mitigation recommendations, and alignment with national and local planning policy, helping to demonstrate that flood risk has been appropriately considered and managed. This supports informed decision-making and smooth progression through the planning process.

Comprehensive Analysis

We assess a wide range of data and environmental factors to determine the likelihood of future flooding and identify measures to reduce its impact.

Site-Specific Reporting

Our reports include detailed modelling, mitigation strategies and compliance with national and local planning policies to ensure flood risk is properly managed.

Planning Application Support

We provide robust documentation that strengthens planning applications, helping clients demonstrate that flood risk has been considered and addressed effectively.

Property & Infrastructure Protection

From critical infrastructure continuity plans to individual property guidance, we deliver practical solutions that safeguard assets and support long-term resilience.

Waterco Datrys

Hydraulic Modelling & Mapping

Hydraulic modelling enables the exploration of a wide range of “what if” scenarios, supporting local authorities as well as public and private sector organisations in planning effective flood mitigation and drainage strategies.

By simulating the flow, volume, and velocity of water across rivers, streams, floodplains, drainage systems, and coastal areas, we deliver precise, actionable insights that address both current risks and future challenges.

Flood Mapping

We translate complex hydraulic outputs into clear, visual representations of flood extents, depths, and velocities. These maps make risk communication accessible, highlight vulnerable areas, and support evidence-based decision-making.

Multi-Disciplinary Expertise

We work alongside structural engineers, environmental consultants, and other specialists to ensure modelling outputs inform every aspect of water management, from technical feasibility to sustainability and regulatory compliance.

Advanced Modelling Tools

Using industry-standard platforms such as HEC-RAS, TUFLOW, and InfoWorks, our mapping outputs are tailored to meet regulatory requirements and integrate seamlessly into planning applications, permitting processes, and strategic flood risk management.

Infrastructure Solutions

Beyond modelling, we apply data to design and implement practical systems, including drainage and water management for surface, foul, and stormwater, as well as reinforced structural designs that comply with building regulations.

Waterco Datrys

Flood Flow Velocities

We provide detailed estimates of flood flow velocities and the associated flood hazard ratings. This supports for emergency planning and ensures that a site has safe access and egress in the event of a flood. Our services include:

Accurate Velocity & Hazard Calculations

We deliver precise estimates of flood flow velocities and hazard ratings, providing the technical evidence needed to assess site safety and resilience.

Emergency Planning Support

Our analysis underpins emergency planning strategies, ensuring safe access and egress routes are identified and maintained during flood events.

Site-Specific Hydraulic Modelling

Using advanced modelling techniques, we evaluate river systems and critical structures such as bridges, weirs, and culverts to understand local flood dynamics.

Enhanced Flood Mapping

We refine Environment Agency flood maps with locally verified data, offering a more accurate and reliable picture of flood risk for your site.

Our Work

Case Studies

Flood Risk Team

Frequently Asked Questions

What is a Flood Risk Assessment (FRA)?

A Flood Risk Assessment checks if a site is suitable for development by evaluating its risk of flooding. Requirements vary by region, but usually depend on the site’s location, size, and type of development. In England and Scotland, it’s called a Flood Risk Assessment; in Wales, it’s a Flood Consequence Assessment.

Do I need a Flood Risk Assessment?

A Flood Risk Assessment is typically required when any of the following applies:

1. The site is over 1ha.

2. Can be classed as a major development.

3. Located in Flood Zone 2 or 3. 4. Drainage area is classed as critical.

Do you provide hydraulic modelling services?

Yes. We use industry-standard tools such as HEC-RAS, TUFLOW, and InfoWorks to simulate water flow, volume, and velocity, supporting effective flood mitigation strategies.

Do you handle flood risk permits and consents?

Yes. Our team manages the full process, preparing and submitting applications such as Environment Agency permits, SEPA CAR licences, and watercourse consents to ensure compliance and smooth project progression.

Who requires a Flood Risk Assessment?

Developers, local authorities, businesses and even individual property owners may need an FRA if their site is in a flood zone, over 1 hectare, or classed as a major development.