[ALOCHONA] Re: Bangladesh Coastline Rising

Bangladesh growing in size by 12.5 sq miles a year Bangladesh is increasing in size contradicting forecasts that the parts of the country will disappear under water due to global warming. Scientists at the Centre for Environment and Geographic Information Services (CEGIS) say that the country's landmass has increased by 20 square kilometres (12.5 square miles) annually.They said that they have studied 32 years of satellite images and found that the country's landmass has increased by 20 square kilometres annually during that time. Data shows that the sediment travelling down the Ganges and the Brahmaputra rivers from the Himalayan watershed are creating new land as they wash into the Bay of Bengal, they said. Mominul Haque Sarker, Head of the department at the CEGIS that looks at boundary changes, said a billion tonnes of sediment that the Ganges, the Brahmaputra and 200 other rivers bring from the Himalayas each year before crossing Bangladesh had caused the landmass to increase. About a third of this sediment, he said, makes it into the Bay of Bengal, where new territory is forming, he said.Sarkar said that in the next 50 years this could add up to the country gaining 1,000 square kilometres. The United Nations Intergovernmental Panel on Climate Change (IPCC) has predicted that Bangladesh, criss-crossed by a network of more than 200 rivers, will lose 17 per cent of its land by 2050 because of rising sea levels due to global warming. The Nobel Peace Prize-winning panel says 20 million Bangladeshis will become environmental refugees by 2050 and the country will lose some 30 percent of its food production. Director of the US-based NASA Goddard Institute for Space Studies, professor James Hansen, paints an even grimmer picture, predicting the entire country could be under water by the end of the century. But Sarker said that while rising sea levels and river erosion were both claiming land in Bangladesh, many climate experts had failed to take into account new land being formed from the river sediment. "Satellite images dating back to 1973 and old maps earlier than that show some 1,000 square kilometres of land have risen from the sea," Sarker said."A rise in sea level will offset this and slow the gains made by new territories, but there will still be an increase in land. We think that in the next 50 years we may get another 1,000 square kilometres of land." Mahfuzur Rahman, Head of Bangladesh Water Development Board's Coastal Study and Survey Department, has also been analysing the buildup of land on the coast.He said findings by the IPCC and other climate change scientists were too general and did not explore the benefits of land accretion. "For almost a decade we have heard experts saying Bangladesh will be under water, but so far our data has shown nothing like this," he said."Natural accretion has been going on here for hundreds of years along the estuaries and all our models show it will go on for decades or centuries into the future." Dams built along the country's southern coast in the 1950s and 1960s had helped reclaim a lot of land and he believed with the use of new technology, Bangladesh could speed up the accretion process, he said. "The land Bangladesh has lost so far has been caused by river erosion, which has always happened in this country. Natural accretion due to sedimentation and dams have more than compensated this loss," Rahman said. Bangladesh has built a series of dykes to prevent flooding."If we build more dams using superior technology, we may be able to reclaim 4,000 to 5,000 square kilometres in the near future," Rahman said. http://nation.ittefaq.com/issues/2008/07/31/news0176.htm --- On Wed, 7/30/08, Isha Khan <bd_mailer@yahoo.com> wrote: From: Isha Khan <bd_mailer@yahoo.com> Subject: Re: Bangladesh Coastline Rising To: dhakamails@yahoogroups.com, notun_bangladesh@yahoogroups.com, alochona@yahoogroups.com, zoglul@hotmail.co.uk, khabor@yahoogroups.com, rehman.mohammad@gmail.com, bdresearchers@yahoogroups.com, mahmudurart@yahoo.com, rivercrossinternational@yahoo.com, sonarbangladesh@yahoogroups.com Date: Wednesday, July 30, 2008, 5:43 AM Bangladesh landmass 'is growing' By Mark Dummett BBC News, Dhaka   Bangladeshis are used to frequent flooding New research shows Bangladesh may not be as vulnerable to rising sea levels caused by climate change as previously feared, scientists in Dhaka say.                 They say satellite images show the country's landmass is actually growing because of sediment dumped by rivers. A report by UN scientists has projected that rising sea levels will inundate 17% of Bangladesh by 2050, making about 30 million people homeless. One its authors said he saw little in the new research to change his mind.   'New islands' Satellite images of Bangladesh over the past 32 years show that the country is growing annually by about 20 square kilometres (12.5 square miles), said Maminul Haque Sarker of the Dhaka-based Centre for Environment and Geographic Information Services.   This was due, he said, to the billion tonnes of sediment that the Ganges, the Brahmaputra and 200 other rivers bring from the Himalayas each year before crossing Bangladesh. Only about a third of this sediment, he said, makes it into the Bay of Bengal. Much of the rest is dumped in Bangladesh's vast delta, attaching itself to river banks, or even creating new islands. Mr Sarkar said that in the next 50 years this could add up to the country gaining 1,000 square kilometres.   But others maintain that Bangladesh is going to lose land over that period. Dr Atiq Rahman, a lead author of the UN Intergovernmental Panel on Climate Change report, told the BBC that there was little in the new research to make him think that their projection needed revising. He said that many people living along the coast had observed that sea levels where higher now than in their grandparents' day. "The rate at which sediment is deposited and new land is created is much slower than the rate at which climate change and sea level rises are taking place," he said.   So while some new land may be created in parts of the country, elsewhere a much larger amount of land will disappear, he said. In any case, the new land will take decades to become useful, and so compensate for fertile farmland that was flooded. Dr Rahman said that what is needed now is a village-by-village survey of coastal Bangladesh. http://news.bbc.co.uk/2/hi/south_asia/7532949.stm --- On Fri, 7/25/08, Isha Khan <bd_mailer@yahoo.com> wrote: From: Isha Khan <bd_mailer@yahoo.com> Subject: Bangladesh Coastline Rising To: dhakamails@yahoogroups.com, notun_bangladesh@yahoogroups.com, alochona@yahoogroups.com, zoglul@hotmail.co.uk, khabor@yahoogroups.com, rehman.mohammad@gmail.com, bdresearchers@yahoogroups.com, mahmudurart@yahoo.com, rivercrossinternational@yahoo.com Date: Friday, July 25, 2008, 9:36 PM Bangladesh Coastline Rising       http://prothom-alo.com/index.news.details.php?nid=MTc2ODE=

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