This Bay Moves 100 Billion Tons of Water Every Day

Key Concepts:

• Extreme Tides: The Bay of Fundy's exceptionally high tides due to its unique geographical characteristics.
• Tidal Energy: Harnessing the kinetic energy of tides to generate electricity.
• Seiche: A standing wave in an enclosed or partially enclosed body of water.
• FORCE (Fundy Ocean Research Center for Energy): A tidal energy test site in the Bay of Fundy.
• Environmental Impact: Potential effects of tidal energy extraction on marine life, particularly fish populations like Atlantic salmon.
• Stakeholder Engagement: Collaboration with government, industry, First Nations (Mi'kmaq), and local communities.

1. The Bay of Fundy's Extreme Tides

• The Bay of Fundy is renowned for having the most extreme tides in the world, with a visual equivalent of water moving up a four-story building.
• Tides rise to over 50 feet, compared to typical ocean tides averaging around three feet.
• One hundred and sixty billion tons of water rush in and out of the Bay of Fundy daily.
• The Bay of Fundy has more water flowing in and out in a tidal cycle than all the rivers in the world combined.

2. Causes of the Extreme Tides

• Tides are primarily generated by the gravitational pull of the moon and the sun on the Earth, combined with the Earth's rotation.
• The Bay of Fundy's shape (large, deep, and narrowing towards its head) creates a natural oscillation or seiche.
• The natural movement (seiche) in the Bay of Fundy is in sync with the Atlantic Ocean tides, amplifying the tidal range.
• The Bay experiences two high tides and two low tides in a 24-hour cycle, with changes occurring approximately every six and a half hours.

3. Tidal Energy Potential

• The high flow rates in the Bay of Fundy channels create a significant potential for harvesting tidal energy.
• Modeling at Acadia University suggests the Bay of Fundy could power about 2500 megawatts, equivalent to 500,000 to 800,000 homes.
• FORCE is a test and demonstration site built for about 30 megawatts, enough to power approximately 20,000 homes.

4. Challenges of Harnessing Tidal Energy

• Working in the Bay of Fundy is challenging due to the fast-moving and chaotic water conditions.
• Environmental concerns, particularly the impact on marine life, are a major consideration.

5. Environmental Monitoring and Mitigation

• Underwater cameras are used to monitor fish behavior and assess the likelihood of fish encountering turbines.
• Research focuses on understanding the movements of Atlantic salmon to minimize risks associated with tidal energy development.
• The goal is to work within the existing ecosystem to minimize destruction and ensure the sustainability of tidal energy projects.

6. Tidal Energy Technology and Projects

• North America's first tidal energy station was built in Annapolis Royal, Nova Scotia, using a turbine within a causeway.
• Tidal stream energy involves placing turbines directly in the water flow without the need for dams or causeways.
• Orbital Marine, a developer from the Orkney Islands in Scotland, is planning to deploy a device in the Bay of Fundy in the next two to three years.

7. Stakeholder Engagement and Collaboration

• Collaboration with government, industry, and First Nations (Mi'kmaq) is crucial for the responsible development of tidal energy.
• Engaging with stakeholders ensures that environmental concerns and community interests are addressed.

8. Notable Quotes

• "The Bay of Fundy has the most extreme tides in the world, and it's just a magical place."
• "We are beholden to nature. Our only defense against nature is working with nature."
• "The bay, if you listen, can teach you an awful lot. If you don't listen, she's gonna get you."

9. Synthesis/Conclusion

The Bay of Fundy presents a significant opportunity for tidal energy generation due to its extreme tides. However, harnessing this energy requires careful consideration of environmental impacts and collaboration with stakeholders. Ongoing research and monitoring efforts are crucial to ensure the sustainable and responsible development of tidal energy in this unique and powerful environment.