{"id":849353,"date":"2026-09-16T03:52:13","date_gmt":"2026-09-16T03:52:13","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/849353\/"},"modified":"2026-09-16T03:52:13","modified_gmt":"2026-09-16T03:52:13","slug":"first-large-scale-hybrid-reef-deployment-launched-at-kalaeloa-to-combat-erosion-and-rising-seas-maui-now","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/849353\/","title":{"rendered":"First large-scale hybrid reef deployment launched at Kalaeloa to combat erosion and rising seas : Maui Now"},"content":{"rendered":"\n

\n\"\"Reef-mimicking structures. PC: HDOT<\/p>\n

To help protect Hawai\u02bbi\u2019s vulnerable coastal highways from erosion and rising seas, the Hawai\u02bbi Department of Transportation is launching the Kalaeloa Hybrid Reef Project. Developed by Defense Advanced Research Projects Agency (DARPA) via its Reefense Program and the University of Hawai\u02bbi alongside academic, community and industry partners the project is an example of nature-based coastal engineering \u2014 an emerging approach that combines engineered infrastructure with natural ecosystems to protect vulnerable coastlines. <\/p>\n

The hybrid reef system integrates engineered reef structures with living coral to reduce wave energy, strengthen shorelines and improve coastal resilience. The deployment marks the first large-scale ocean demonstration of the technology, following four years of research and development.<\/p>\n

\u201cSuccess at Kalaeloa could provide a model for protecting vulnerable coastlines throughout Hawai\u02bbi and beyond,\u201d said HDOT Director Edwin Sniffen. \u201cWe\u2019re not just defending our shorelines, we\u2019re building a resilient, self-sustaining ecosystem. By partnering with DARPA and UH, we are helping position Hawai\u02bbi as a global leader in nature-based coastal engineering.\u201d<\/p>\n

\"\"Blessing event of reef-mimicking structures. PC: HDOT<\/p>\n

Funded by DARPA, the hybrid reef structures were researched, developed and deployed in collaboration with UH, Makai Engineering, Kuleana Coral Restoration and other partners. Following deployment, ownership of the structures will transfer to HDOT.<\/p>\n

The first year of monitoring and maintenance of the project is funded by the State\u2019s Green Fee program, which supports conservation and environmental initiatives that protect and restore Hawai\u02bbi\u2019s natural resources. The investment supports the first large-scale demonstration of a nature-based alternative to seawalls that aims to reduce coastal erosion, wave damage and storm surge while enhancing marine habitat.<\/p>\n

\u201cThe Green Fee is about investing in innovative solutions that protect Hawai\u02bbi\u2019s people, natural resources and economy for generations to come,\u201d said Governor Josh Green. \u201cThe Kalaeloa Hybrid Reef Project is exactly the kind of forward-thinking partnership we envisioned, bringing together science, innovation and environmental stewardship to strengthen our coastlines while preserving the natural resources that make Hawai\u02bbi unique.\u201d<\/p>\n

\u201cThrough Reefense, DARPA is reimagining coastal defense by combining cutting-edge materials science with adaptive biology to protect vital infrastructure and personnel from wave damage, erosion, and severe storms,\u201d said Dr. Catherine Campbell, DARPA deputy director Biological Technologies Office. \u201cOur collaboration with the University of Hawai\u02bbi, state leadership, and local partners at Kalaeloa translates high-risk, high-reward defense research into a scalable, real-world solution that safeguards critical transportation corridors while strengthening the surrounding marine ecosystem.\u201d<\/p>\n

A \u2018living\u2019 breakwater\u00a0<\/p>\n

The Kalaeloa Hybrid Reef is a UH-developed living breakwater designed to reduce wave energy while improving the natural habitat. The system consists of 60 engineered, porous concrete reef mimicking structures manufactured in Hawai\u02bbi that dissipate wave energy while allowing water to flow through the reef. Coral settlement modules attached to the structures will support the recruitment and growth of native corals while specially developed biomaterials will repel competing algae and accelerate coral growth. These and other technologies being tested will\u00a0allow the reef to develop into a healthy, self-sustaining ecosystem over time.\u00a0<\/p>\n

The project site is a degraded area with a hard rock bottom south of Kalaeloa Harbor. Although there is minimal live coral in the project site, work at Kalaeloa will begin with the careful removal of any coral fragments present and preservation of that coral on growing tables near the project area. \u00a0Next will be installation of the reef structures, attachment of live coral fragments to the structures, and continued scientific monitoring to evaluate their performance.<\/p>\n

The deployment is the result of four years of research and development by the Rapid Resilient Reefs for Coastal Defense (R3D) consortium. Led by the UH Applied Research Laboratory and the School of Ocean and Earth Science and Technology, the initiative brings together researchers from five UH laboratories, partner universities and local organizations, including Makai Ocean Engineering and Kuleana Coral Restoration.<\/p>\n

\u201cKalaeloa will become a living laboratory where we can evaluate how nature-based coastal engineering performs under real-world ocean conditions,\u201d said Ben Jones, R3D principal investigator and director of ocean science and technology at the UH Applied Research Laboratory. \u201cOur goal is to demonstrate that living breakwaters can provide an effective alternative to traditional shoreline hardening and to collect the scientific data needed to guide future coastal resilience projects in Hawai\u02bbi and around the world.\u201d<\/p>\n

Community helps guide long-term stewardship<\/p>\n

Once deployed, the Kalaeloa Hybrid Reef will serve as a living laboratory for the emerging field of nature-based coastal engineering, which integrates engineered infrastructure with natural ecosystems. Long-term monitoring will be guided by the newly established Kalaeloa Hybrid Reef Monitoring Hui, a partnership of researchers, agency representatives, community organizations and cultural practitioners that will assess the reef\u2019s environmental, engineering and cultural impacts. This local partnership includes community stakeholders such as the Makakilo-Kapolei-Honokai Hale Neighborhood Board, and the m\u0101lama kai organization Ho\u02bbola H\u0101ni\u02bbo.<\/p>\n

\u201cThis project would not be possible without the partnership of the local community,\u201d said Sniffen. \u201cWe are grateful to the organizations and cultural practitioners who have helped shape this effort and will continue to guide its long-term stewardship. Their knowledge and commitment are essential to the project\u2019s success.\u201d<\/p>\n

The findings will be shared with regulators, engineers and coastal managers to help inform future shoreline protection projects in Hawai\u02bbi and elsewhere. If successful, the Kalaeloa Hybrid Reef could provide a scalable, nature-based approach to protecting vulnerable coastlines while advancing the growing field of nature-based coastal engineering.<\/p>\n

Building a living reef<\/p>\n

The Kalaeloa Hybrid Reef is an example of nature-based coastal engineering, integrating coastal engineering, marine biology and innovative deployment techniques to create a living coastal protection system. UH has partnered with University of California San Diego (UCSD) and the Scripps Institution of Oceanography (SIO), Florida Atlantic University and Ohio State University on its development.<\/p>\n

Engineered reef structures:\u00a0The foundation relies on specifically designed concrete reef structures designed by Ocean and Resources Engineering at UH cast by Kapolei-based firms Jensen Infrastructure and GPRM Prestress, located less than two miles from the deployment site. In large-scale wave-flume tests, these model breakwaters successfully reduced incoming wave energy by more than 80% while remaining stable during extreme conditions.<\/p>\n

3D-printed coral habitat:\u00a0To kickstart the living reef, the Hawai\u02bbi Institute of Marine Biology (HIMB) developed 3D-printed ceramic modules featuring small, spiral-shaped shelters called \u201chelix recesses.\u201d Experiments in K\u0101ne\u02bbohe Bay showed that these crevices yielded an 80-fold increase in baby coral settlement and up to a 50-fold increase in survival rates compared to flat surfaces.<\/p>\n

Biomaterials:\u00a0Researchers at the UCSD have developed novel materials that reduce algae competition while allowing for coral to grow on the structures. Other materials provision the juvenile coral with nutrients needed in their early life stages.<\/p>\n

Acoustic Enrichment:\u00a0Researchers at UCSD-SIO have recorded sounds of healthy reefs that will be broadcast near the living breakwater to encourage algae-grazing fish to the site.<\/p>\n

Low-impact deployment:\u00a0To minimize disruption to the marine environment during deployment, Makai Ocean Engineering has developed a shallow-water catamaran, eliminating the need for heavy crane barges. Additionally, the structures will be anchored using a novel rotary micropiling system, which significantly reduces the anchoring footprint and sound pollution compared with traditional pile drivers.<\/p>\n","protected":false},"excerpt":{"rendered":"Reef-mimicking structures. PC: HDOT To help protect Hawai\u02bbi\u2019s vulnerable coastal highways from erosion and rising seas, the Hawai\u02bbi…\n","protected":false},"author":2,"featured_media":849354,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[55797,294483,107344,132171,70556,192,343312,359107,359108,359109,359110,359111,359112,359113,359114,359115,359116,359117,79,359118,16041,64764],"class_list":["post-849353","post","type-post","status-publish","format-standard","has-post-thumbnail","category-environment","tag-climate-adaptation","tag-coastal-resilience","tag-coral-restoration","tag-darpa","tag-defense-advanced-research-projects-agency","tag-environment","tag-erosion-control","tag-green-fee","tag-hawaii-department-of-transportation","tag-hdot","tag-hybrid-reef","tag-kalaeloa","tag-kalaeloa-hybrid-reef-project","tag-living-breakwater","tag-marine-technology","tag-nature-based-coastal-engineering","tag-reefense","tag-reefense-program","tag-science","tag-sustainable-infrastructure","tag-uh","tag-university-of-hawaii"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/849353","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=849353"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/849353\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/849354"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=849353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=849353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=849353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}