Hawaii researchers are deploying 60 large concrete structures off Oahu to grow a living reef that could reduce wave energy and protect vulnerable coastal highways. The experiment addresses a statewide problem: hundreds of miles of state roads face erosion and flooding with little room to be moved inland.
- The Kalaeloa Hybrid Reef Project places 60 porous concrete structures in shallow water off Oahu to break up wave energy and support coral growth.
- Lab tests showed model breakwaters can reduce incoming wave energy by over 80%, though real-ocean results at Kalaeloa are still being measured.
- West Maui’s Honoapiilani Highway is among the coastal corridors the state has already been planning to partially reroute inland due to hazard exposure.
- HDOT has identified hundreds of miles of Hawaii state highway vulnerable to storm surge, high-wave flooding, and erosion.
- Coral establishment on the structures will take years and faces additional risks from warming water and bleaching before the reef defense can be fully evaluated.
Source: Beatofhawaii
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