Thursday, August 30, 2007

Vulnerable to rising seas, Singapore envisions a giant seawall

International Herald Tribune: Surrounded by sea and almost pancake flat, Singapore is without doubt vulnerable to the rising sea levels many scientists predict global warming will cause…

Faced with the prospect of a long, slow submersion into the very waters that serve as the lifeblood of this maritime trading hub, Singapore has reached out to the world's greatest experts on the subject of battling back the sea - the Dutch. "We are already in consultations with Delft in Holland to learn how we can build dikes," said Lee Kuan Yew, the former prime minister, in an interview last Friday.

Delft Hydraulics, a research institute and consulting firm specializing in water management issues in the canalled Dutch city of Delft, is already helping Singapore convert its biggest river and marina into a huge downtown reservoir. Now it is also helping the city-state look into just what it can do to defend its roughly 200-kilometer, or 125-mile, coastline….

Singapore got a preview of just what havoc rising sea levels could cause back in 1974 when a rare astronomical event caused the tides to rise 3.9 meters, more than double the usual level. "It eroded the coast very badly," said Wong Poh Poh, an associate professor specializing in beach geography at the National University of Singapore, who studied the event. Areas along the Singapore River were inundated, as were parts of the airport and a coastal public park built on reclaimed land.

Wong later discovered that during such periods of elevated sea levels, the variations between high and low tide are accentuated, putting the country's reservoirs, many of which lie adjacent to the coast, at risk. Singapore officials later used one of Wong's reports to draw the attention of the United Nations to the problems associated with global warming.

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