Coastal communities around the world are adding a tropical twist to shoreline protection, courtesy of the humble coconut.
From the sands of the Jersey Shore to the islands of Indonesia, strands of coconut husk, known as coir, are being incorporated into shoreline protection projects.
“We're always trying to reduce wave energy while shielding the shoreline, and whenever we can, we like to employ nature-based solutions,” said Tim Dillingham, the group's executive director. “This material is readily available, particularly in developing countries and it's relatively inexpensive compared with harder materials.”
The coconut-based material biodegrades over time, by design. But before it does, it is sometimes pre-seeded with shoreline plants and grasses, or those plants are placed in holes that can be punched into the coir logs. Cape Cod, Massachusetts, did a similar project last year, and the Delaware Department of Natural Resources and Environmental Control is offering funding to help landowners, homeowner associations and others install living shorelines made of materials that can include coconut fibers.
Residents of Diogue Island in Senegal are using wooden structures and coconut fronds and sticks to reclaim eroded sections of beach.In 2016, the Felix Neck Wildlife Refuge in Edgartown, Massachusetts, on Martha’s Vineyard installed it at the Sengekontacket Pond, where a salt marsh had eroded by several feet in previous years. While it did help reduce erosion for a while, the husks did not last long due to strong wave action.
Similarly, coconut fiber mats and logs were used recently on Chapel Island in Nova Scotia, Canada, but they were damaged by bad weather.
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