Fixed offshore wind
Fixed offshore wind is central to net‑zero, and projects are moving into more challenging waters as the seabed grows increasingly congested. We support developers, designers, contractors and operators by assessing hazards, optimising foundations and cables, planning port upgrades, and de‑risking delivery through advanced design, modelling, physical testing and data‑driven insight. We enable safe, resilient and cost‑effective offshore wind infrastructure worldwide.
Understanding offshore wind sector and climate pressures
Offshore wind is expanding rapidly, driving innovation in fixed‑bottom foundations and subsea engineering. Projects are being built in more challenging waters, with tighter environmental constraints and greater scrutiny on lifecycle resilience. Climate change, extreme weather and evolving regulation require credible evidence that designs will perform safely under present and future conditions.
Fixed bottom offshore wind engineering and environmental risks
Developers need confidence in how foundations, cables and substations will behave under waves, tides and mobile seabeds. As sites become more complex, so do scour risks, hydrodynamic loads, cable‑protection needs, nearshore landfalls, noise management and installation logistics. Robust, defendable assessments are required across site selection, consenting, construction, operation, life‑extension and decommissioning.
How HR Wallingford supports fixed bottom offshore wind - from design to decommissioning
With over 25 years in offshore wind, our teams bring deep expertise in hydraulics, coastal and seabed processes. As one of Europe’s largest physical modelling laboratories, we use purpose‑built flumes - including our Fast Flow Facility - to test new foundation concepts and understand hydrodynamic behaviour under challenging conditions. Combined with advanced numerical and noise modelling, field monitoring and digital decision‑support tools, we optimise foundation stability, refine cable landfalls, design effective scour and cable protection, and plan safe marine operations. We also support the enabling port infrastructure - navigation, logistics, dredge management and operational modelling - so operators can deliver efficient, 24/7 facilities at a proportionate cost. Across the full lifecycle, we provide clear, defensible evidence for permitting, operational performance and environmentally responsible decommissioning.
Reducing risk and improving performance in fixed bottom offshore wind
Our work strengthens design certainty, shortens programmes and reduces costly remediation. We help organisations minimise environmental impacts, safeguard people and assets, and operate with confidence over the long term. By integrating modelling, monitoring and best practice, we enable resilient, high‑performing projects that accelerate renewable energy delivery.
Fixed offshore wind expertise
Physical and advanced CFD modelling of waves, currents, flow amplification and loads to optimise monopile, jacket and gravity based designs.
Large scale flume testing of foundation behaviour, scour development and cable protection system (CPS) stabilisation to validate design performance.
Purpose built high velocity flow experiments to assess new foundation types and validate scour and cable protection strategies.
Prediction of scour, design of rock or engineered solutions, and monitoring programmes to manage risk through construction and operation.
Assessment of coastal processes, sediment mobility and nearshore hazards for robust routing, landfall and installation.
Understanding seabed change, mobility and long term coastal evolution across arrays, corridors and landfalls.
Assessment of underwater noise during installation and operation, with mitigation advice to support environmental approvals.
Scenario testing for storms, waves and future climate conditions to improve design resilience and operational planning.
Expert support including weather window, access and operability analysis to de risk nearshore works, vessel access and offshore campaigns.
Full bridge simulation and risk assessment for port approaches, marine terminals and O&M movements.
Layout, dredge and operational modelling to plan upgrades that support round the clock construction and O&M.
Evidence for EIA, covering hydrodynamics, morphology, noise, sediment and water quality interactions.
Advice on wave, current and seabed measurements to inform design, calibrate models and verify performance.
Options appraisal for removal, environmental effects assessment, sediment disturbance and seabed restoration planning.
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Iain Gunn
