(Corrects name in para 5 to 'HaskoningDHV' from 'HaskoningDNV')
By Alister Doyle, Environment Correspondent
OSLO, June 24 Bangladesh will start using sonar
to help slow erosion of its biggest island in the Ganges Delta
where climate change and rising sea levels are adding to risks,
a Dutch-Bangladeshi consortium said on Tuesday.
Floods constantly reshape low-lying Bhola island, which is
130 kms (80 miles) long and home to 1.7 million people. A 1776
map showed that it was oval but it is now more banana-shaped due
to erosion by the Meghna River that is part of the delta.
The consortium told Reuters that a 1.5 metre (5 ft) long
sonar, similar to equipment used to search for missing Malaysia
Airlines flight MH370, will be towed behind a boat to check
protective sandbags off the fast-eroding eastern coast.
Monthly sonar surveys would let experts see if the bags,
weighing up to about 250 kg (550 lbs), were shifting in waters
that are too muddy and fast-flowing for divers. The erosion
early warning system would allow damaged bags to be replaced.
"This will save a lot of money on repair work," Jan Bron,
project manager at Dutch engineering consultancy Royal
HaskoningDHV, told Reuters.
If it works, the project will expand to other areas of
Bangladesh, which is among the nations most vulnerable to
climate change. It could also be applied to other low-lying
Planning for the project will cost 1.3 million euros ($1.77
million) and the Dutch and Bangladeshi governments will each
give 22 million euros to help protect a vulnerable part of
The consortium comprises Royal HaskoningDHV, technology
firms AGT Netherlands and TechForce Innovations from the
Netherlands and Bangladesh's TigerIT, engineering group EPC and
the Institute of Water Modelling.
"The system will provide a good insight into how erosion
takes place," Pieter-Christiaan van Oranje-Nassau, Chief
Executive of AGT Netherlands, said in a statement.
Bhola "is just 6 feet above sea level at the highest point.
Climate change will have an effect," Bron said.
Global sea levels have risen by about 20 cms (8 inches)
since 1900 and could rise by almost a metre in the worst case
this century due to a melt from Greenland to Antarctica,
according to a U.N. panel of climate experts.
The panel says it is at least 95 percent probable that
man-made greenhouse gas emissions are causing global warming,
adding to risks of floods, droughts and rising sea levels.
Bangladesh is vulnerable to cyclones and shifting monsoon rains.
($1 = 0.7357 euros)
(Editing by Susan Fenton)