Wednesday, November 9, 2011

Floods show what lies ahead for sinking Bangkok

Amelie Bottollier-Depois in PhysOrg points out a major problem: The Thai capital, built on swampland, is slowly sinking and the floods currently besieging Bangkok could be merely a foretaste of a grim future as climate change makes its impact felt, experts say. The low-lying metropolis lies just 30 kilometres (18 miles) north of the Gulf of Thailand, where various experts forecast sea level will rise by 19 to 29 centimetres (7 to 11 inches) by 2050 as a result of global warming.

Water levels would also increase in Bangkok's main Chao Phraya river, which already overflows regularly. If no action is taken to protect the city, "in 50 years... most of Bangkok will be below sea level," said Anond Snidvongs, a climate change expert at the capital's Chulalongkorn University.

But global warming is not the only threat. The capital's gradual sinking has also been blamed on years of aggressive groundwater extraction to meet the growing needs of the city's factories and its 12 million inhabitants.

As a result Bangkok was sinking by 10 centimetres a year in the late 1970s, according to a study published last year by the World Bank, the Asian Development Bank (ADB) and the Japan Bank for International Cooperation....

Floods in Thailand's Ayutthaya Province in November, 2011, shot by the UN

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