A coal reef was discovered at Dubai’s dry dock’s breakwater but was in an area that had been chosen as a land base for firms building The World archipelago. Experts decided that the traditional methods of moving coral was going to be too damaging to the fragile creatures and so a plan was formed to move more than eleven hundred rocks, each encrusted with precious coral. Each rock weighed about five tons and had to be moved without leaving the water.
It has now been revealed that the painstaking process, which took over five weeks to complete, has resulted in coral that is thriving in it’s new home as The World’s breakwater.
“Traditionally, when coral is moved it is chiselled or drilled from rocks, placed in baskets and shipped to a new location,” said Brendan Jack, Head of Sustainability and Environment for Nakheel Northern Projects. “That wasn’t open to us because each of the rocks was encased in coral, so we went back to the drawing board to find an engineering solution. This operation took considerable time and effort and, importantly, money and illustrates the extent to which Nakheel takes seriously its environmental management responsibilities. Nothing like this has ever been attempted before and we are very pleased with the outcome.”
In a typical relocation project of this sort only thirty percent of the coral survives, but using this method only seven percent of the coral died during it’s move. The details of the relocation was kept under wraps for a year and was announced to coincide with World Environment day.
Scientific study of the reef is continuing and Marine biologist John Burt, Assistant Professor at Zayed University is regularly visiting the reef and checking on the progress of the transplanted coral.
He said: “What we found [in the initial assessment] was the biggest coral reef in Dubai and an area of extreme importance. Because of the conditions in the Gulf – where the water temperature can reach 35C and drop to 15C – coral has difficulty establishing itself. However, it has learned to adapt and we believed it was important to do everything we could to protect this reef. We could not take all of the coral. In some places the water was too shallow for the crane so the rocks had to be left. I believe once development around the Dry Docks breakwater begins the remaining coral has no chance of survival.”
Engineers and divers drilled iron bolts through the rocks and attached a sling to hoist them from there home. The ricks were then raised, but never removed from the water, being attached to mountings which were welded to the deck of a barge and left suspended in the water. The rocks were then transported the fifteen km to there new resting place before being carefully lowered in to place.
The total area now covered by the new reef is 6,560sq m. The exact location has not been revealed but it is hoped that once firmly established the reef will become a recognised diving site.
A Nakheel spokesman said: “Initial observations show the project has been extremely successful with damage kept to a minimum, as indicated by a lack of breakage and stress. As the coral continues to thrive the waters around The World will see an increase in coral cover and diversity in the long term and will also attract reef-associated fish. A number of the dominant corals, now at The World, are ‘broadcast spawners’ and their reproductive activities could result in the development of coral on nearby rocks.”
Source: Emirates Business 24