Assessing impacts of tidal power lagoons of a consistent design

Lucas Mackie, Stephan C. Kramer, Matthew D. Piggott, Athanasios Angeloudis

Research output: Contribution to journalArticlepeer-review

Abstract

Tidal power lagoons have the potential to provide a reliable and long-term source of renewable power. The construction of tidal lagoons will impact the tidal conditions and hydrodynamics of the surrounding coastal system.
Impact assessments in the academic literature have generally investigated working proposals from industry of various shapes and sizes. As such, differences between the impacts arising from considered power plants in varying sites are in part influenced by the individual scheme characteristics, potentially masking the influence of site-specific factors. In this study, scheme design consistency is maintained, providing a basis to focus solely on the merits of the selected locations with regards to any associated impacts. The tidal power lagoons are located in the Bristol Channel and Irish Sea, two distinct but tidally connected regions on the British coastline with contrasting marine environment characteristics. Results indicate that the more constrained geometry of the Bristol Channel contributes to higher individual and cumulative impacts than potential developments in the Irish Sea. This is in part facilitated by the higher degree of blockage introduced by tidal lagoon developments in the Bristol Channel. Furthermore, far-field impacts are found to be less pronounced in comparison to predictions reported in tidal barrage modelling studies.
Original languageEnglish
Article number109879
JournalOcean Engineering
Volume240
Early online date2 Oct 2021
DOIs
Publication statusPublished - 15 Nov 2021

Keywords

  • Tidal range energy
  • Marine energy
  • Hydrodynamic impact
  • Resource assessment
  • Consistent design

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