Wall contributes to beach erosion

The Treasure Island Resort Sea Wall is just one of the factors responsible for apparent beach erosion south of Seven Mile Beach.

The Treasure Island Sea Wall is likely interfering with the natural movement of sediment and sand along the strip between Seven Mile Beach and George Town, said Department of Environment Assistant Director for Research and Assessment Mr. Timothy Austin. But beach instability predates its construction, he said.

Treasure Island Sea Wall

The Treasure Island Sea Wall may be interfering with natural sand and sediment movement south of Seven Mile Beach.

Photos taken last Wednesday reveal a significant build up of sand to the south of the wall and a bare outcropping of rock to the north.

The outcropping of rock extends up to the southern wall of the adjoining property.

Mr. Austin said aerial photos from the 1970s and ’80s show that the beach is subject to vast seasonal transformations.

He said the exposed rock was not necessarily the result of erosion as much of the sand in the area had been trucked in to cover the rocky outcropping that naturally exists there.

The fact that the vegetation line along the strip of beach has not changed much in the past three decades indicates that the problem had more to do with instability than permanent erosion, Mr. Austin said.

He said fine grained sand in the area is more easily swept away by storms than the heavier sand at Seven Mile Beach’s northern end.

A report prepared for the Department of Environment in 2000 also shows that development too close to the beach has impaired the beach’s rapid self-healing ability.

Mr Austin said ocean and beach buildings are an ongoing concern.

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