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Tunnelling technique developed to save coral

Japan-based contractor Taisei is using techniques it developed for use on construction of Turkey’s Bosphorus Strait immersed tube tunnel to promote coral growth.

Taisei is using concrete tunnel sections to create a framework for the coral which are being placed in the prime location to promote coral larvae through use of tidal prediction technology.

The technology is being used to determine the location and time when moderate tides, suitable water temperature and good water quality combine to mean that coral eggs, which are carried on the tide after being hatched, will land in ideal conditions.

The company has announced that it has succeeded in settling coral larvae on 600 concrete blocks using its stream prediction method to find appropriate areas off Miyakojima Island in Okinawa.

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