The Tidal Irrigation and Electrical System

renewable energy, carbon dioxide sink, biodiesel, and food from the ocean

Waves

Martin on Apr 12th 2008

One of the biggest challenges facing the architect of a TIE System will be the extreme waves that can be generated during a hurricane or typhoon. For instance, the maximum wave recorded from category four Hurricane Mitch was a slamming wave thirty meters high. If that wave impacted on a wall or a shoreline, it would generate about one hundred tons per square meter of force. That is an enormous force, but not insurmountable. The side of a standard cargo ship is designed to withstand a fifteen meter wave.

The design of the artificial atoll walls will be difficult (see Technology: Walls) but the strictures of the design are less severe than it may initially appear. The openness of the design of a TIE System means that when extreme waves occur, any over topping into the lagoon will have little or no measurable effect on the organisms living in the lagoon. However, the lagoon itself will be swamped when it interacts with a tropical depression. Hurricanes and typhoons are actually giant low barometric pressure systems and with them coincides a raising of the level of the ocean by several meters. The biggest destructive power of a wave is in its top third. By being lower in the water the atoll wall reduces the destructive power of the waves striking a TIE System. However, this does mean that any stock in the lagoon may have escaped into the open ocean.

This may be expensive if fish raised in the lagoon are slow-growing or simply an annoyance if the primary biologic product is algae, which can double its biomass in 12 hours.