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Tidal influence on high frequency harbor oscillations in a narrow entrance bay

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  • S. Monserrat
  • I. Fine
  • A. Amores
  • M. Marcos

Abstract

High frequency sea level oscillations at Wells Harbor (Maine, Northeastern US), with periods in the range of several tens of minutes, display a tidally modulated response. During low tides, these sea level oscillations reach amplitudes of 10–20 cm, while during high tides they are significantly smaller. Wells Harbor is located in a low lying area with a tidal range of about 2 m and is connected to the open ocean through a narrow channel. Thus, the extent and depth of the bay significantly vary over a tidal cycle. This changing geometry determines both the resonant periods and the amplification factor of the bay. Numerical results confirm the link between observed variability and these specific topographic features. Results imply that when exceptionally energetic long waves reach the Wells Harbor entrance (as in the case of a tsunami or meteotsunami) the expected response will be significantly stronger during low tide than during high tide. Although mean sea level would be lower in the former case, the currents inside the bay would be stronger and potentially more dangerous. This tidally modulated response could be extrapolated to other sites with similar topographic characteristics. Copyright Springer Science+Business Media Dordrecht 2014

Suggested Citation

  • S. Monserrat & I. Fine & A. Amores & M. Marcos, 2014. "Tidal influence on high frequency harbor oscillations in a narrow entrance bay," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 74(1), pages 143-153, October.
    • Handle: RePEc:spr:nathaz:v:74:y:2014:i:1:p:143-153
    DOI: 10.1007/s11069-014-1284-3
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    References listed on IDEAS

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    1. Cummins, Patrick F., 2013. "The extractable power from a split tidal channel: An equivalent circuit analysis," Renewable Energy, Elsevier, vol. 50(C), pages 395-401.
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    Cited by:

    1. Alexander B. Rabinovich & Jadranka Šepić & Richard E. Thomson, 2021. "The meteorological tsunami of 1 November 2010 in the southern Strait of Georgia: a case study," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 106(2), pages 1503-1544, March.

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