Talihau community in Tonga embraces natural, low cost methods for beach restoration

An innovative set of techniques developed specifically for the strengthening and rehabilitation of beaches in the Pacific island region have been put to the test in Vava'u, Tonga.

This approach to coastal erosion has been developed over the past two years as part of the coastal Ecosystem-based Adaptation project which is implemented by the Secretariat of the Pacific Regional Environment Programme (SPREP) and funded by the Australian Government under its International Climate Change Adaptation Initiative (ICCAI).

The beach rehabilitation guidelines and practical interventions - developed over the past two years and tested in Samoa, Vanuatu and Kiribati - are designed to limit and, where possible, stop continued erosion on affected beaches in the region and put in place strategies to try to reverse damage that has already taken place. Such rehabilitation can strengthen coastal resilience to the impacts associated with sea level rise.

Crucially, the techniques are designed to be cheap, achievable and easily managed by local communities in both the short and long term. Dr Joanna Ellison, an expert on coastal geomorphology from the University of Tasmania and a long-term collaborator with SPREP on coastal issues, helped to devise the techniques following extensive research and testing in North Tarawa, Kiribati. She explains:

"Everybody knows that erosion is a problem on a lot of Pacific island beaches, but what many people don't know is that there are many low cost, natural ways to make beaches stronger. Often, people put a lot of pressure on beaches without realising. By recognising and reducing this pressure we can work together to get sediment to come back to the beach and stay there."

The value and importance of community support was aptly demonstrated during the recent application of these tactics at Talihau Paradise Beach in Vava'u. Representatives from all levels of government joined forces with members of the community to protect the quite seriously degraded Talihau Paradise Beach from further erosion.

Town Officer, Siaosi, observed that in the 33 years he has lived at Talihau he has witnessed a large number of changes to the beach:

"Just ten years ago there were a lot of trees and the sea level was far away from the shoreline. Now you can see that things are very different. It is not only the natural activities that cause this erosion, but the human activities too."

SPREP's Environmental Monitoring and Reporting Officer, Mr Paul Anderson, said that an assessment of the beach confirmed Siaosi's suspicion that human impacts were having a grave effect on the condition of the beach. In the 100 metres long stretch of beach, Mr Anderson observed only six mature trees and no evidence of new growth - a classic sign of degradation caused by trampling from humans and animals. He explains:

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Tonga embraces low cost methods for beach restoration