Technical Expertise

Multidisciplinary teams comprising of specialists across ten industry sectors, we have the expertise necessary to grapple with challenging assignments.

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Commitment to Clients

Our business is built on relationships, and our clients will always be our top priority.

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Featured Project

Silvertown Tunnel London UK

Silvertown Tunnel
One of the largest engineering projects in the world.

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Who We Are

International Award-Winning Engineering Consultants who deliver ground breaking solutions at the forefront of industry best practice.

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Our Regions

Carbon Reduction Plan

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Our Commitment to Net Zero
Ayesa is committed to becoming a net zero engineering consultancy by 2040

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Stay on top of the latest developments, appointments, awards and more across all our offices.

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Featured News

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On 19th October 2023, ByrneLooby will rebrand to Ayesa

ByrneLooby will officially adopt the name of its parent company, Ayesa, a global engineering and technology services provider.

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Investing In Our People

Cultivating a culture in which individual differences and the contributions of our staff are recognised and valued.

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Our EDI Policy

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Celebrating People
Fostering a culture where you are encouraged to be yourself.

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International Presence

Multidisciplinary team comprising of specialists across Ireland, UK and the Middle East.

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Flood Risk Assessment (FRA) and Management Plans

Assessing and Managing Flooding Risks

The purpose of a Flood Risk Assessment (FRA) is to identify and quantify the risk of flooding to people, property and infrastructure. Following the flood risk assessment, if the identified risk is unacceptable, we prepare a Flood Risk Management Plan (FRMP) that outlines cost-effective and sustainable long-term management strategies. 
FRAs can be undertaken at regional, strategic or site-specific scales. 

The assessment of the flood risk follows a specific sequence of steps:

  • Calculate the extent and frequency of flooding
  • Determine the economic, social and environmental impact of flooding, including the safety and health impacts
  • Outline the existing risk and potential future risk resulting from changes in climate and human activity
  • Flood Maps are used to indicate flood extents, depths and hazards for a range of probabilities (return periods). Determination of economic damages are typically calculated from databases of historical costs of flooding

The FRMP will usually consider a suite of measures:

  • Adaptation planning
  • Emergency response planning
  • Flood forecasting and warning
  • Individual property protection
  • Land use management 
  • Maintenance of river channels 
  • Natural water retention measures
  • Promotion of individual and community resilience
  • Structural measures such as flood defence walls and embankments
  • Sustainable planning and development management
  • Sustainable Urban Drainage Systems (SUDS)
  • Voluntary Home Relocation

Certain options will address the existing flood risk, e.g., structural measures, whereas others are suitable for managing future flood risk only, e.g. sustainable planning and development. All feasible options are considered in detail through a multi-criteria analysis that considers the technical, environmental, and economic aspects of each, allowing a preferred option to be chosen from the results.

Expertise In-Depth:

• Aerial /Lidar/ DTM surveys
• Catchment area modelling
• Coastal modelling
• Contract administration
• Design of flood defence systems
• Early flood warning systems
• Environmental Impact (EI) & Appropriate Assessments (AA)
• Feasibility studies
• Flood defence condition surveys
• Flood early warning systems
• Flood estimation
• Flood extent and hazard mapping
• Flood Relief Schemes (FRS)
• Flood resilience planning
• Flood Risk Assessment (FRA)
• Flood risk assessments & appraisal
• Flood risk management plans
• Flood risk management plans
• Flood risk/hazard mapping
• Funding submissions
• Ground Investigations and Surveys
• Hydrodynamic modelling & assessment
• Hydrological studies
• Hydrological studies
• Natural flood risk management measures
• Pumping station assessment and development
• River modelling
• Surface water modelling
• Topographical & bathymetric survey management


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