Assessment of hydrodynamic impacts throughout the Bay of Fundy and Gulf of Maine due to tidal energy extraction by tidal lagoons

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TypeArticle
Proceedings titleProceedings, Annual Conference - Canadian Society for Civil Engineering
ConferenceAnnual Conference of the Canadian Society for Civil Engineering 2011, CSCE 2011, 14 June 2011 through 17 June 2011, Ottawa, ON
Volume4
Pages31003110; # of pages: 11
SubjectCoastal lagoons; Environmental problems; Existing conditions; Far-field; Finite-element; Gulf of Maine; Hydrodynamic impacts; Numerical models; Power generating systems; Tidal currents; Tidal energy; Civil engineering; Finite element method; Hydraulic structures; Hydrodynamics; Lakes; Ocean currents; Seawater; Turbines; Water levels; Tidal power
AbstractThe Bay of Fundy is home to some of the world's largest tides and has long been identified as one of the world's premier locations for the installation of tidal power generating systems. This paper deals with the assessment of hydrodynamic impacts throughout the Bay of Fundy and Gulf of Maine due to power generation by tidal lagoons located in Minas Basin. The lagoon concept involves temporarily storing seawater behind an impoundment dike and generating power by gradually releasing the seawater through conventional low-head hydroelectric turbines. Tidal lagoons represent a relatively novel approach to tidal power generation, and are intended to achieve high efficiency while avoiding some of the environmental problems associated with tidal barrages. A detailed two-dimensional (depth-averaged) finite-element numerical model, based on the TELEMAC system, has been developed, calibrated against observed water levels and velocities, and applied to simulate tidal hydrodynamics throughout the Bay of Fundy and Gulf of Maine, both for existing conditions without a lagoon and for two scenarios with tidal lagoons operating in Minas Basin. A 12 km 2 offshore lagoon with 14 turbines generating ∼124 MW on average and a 24 km 2 coastal lagoon with 24 turbines generating ∼220 MW on average have been investigated. This paper provides a summary of the work that has been performed to date and presents results describing the local and far-field changes in water levels and tidal currents due to tidal lagoons operating in the upper Bay of Fundy.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Canadian Hydraulics Centre (CHC-CHC)
Peer reviewedYes
NPARC number21271532
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Record identifierb43eac5b-5ad5-445d-a5d4-02931c557503
Record created2014-03-24
Record modified2016-05-09
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