Methods for removing salinity in coastal areas
Introduction:
●Context of Bangladesh's coastal zone.
● A large part of Bangladesh's coastal zone (50-60 year old embankments) isvulnerable due to lack of regular maintenance.
● Every 100 years, 12-18% of the area is lost to the sea or due to river erosion.
● Sea level is rising at a rate of 3-5.8 mm per year, which is inundating 17% of thecoastal area.
● IPCC and Bangladesh Delta Plan 2100: 1 meter of sea level rise could permanentlysubmerge 15-18% of the land, resulting in the risk of displacement of 3-5 millionpeople.
● The average elevation of the coastal zone is 1-3 meters, while the Sundarbans is0.9-2.1 meters.
● The coastal zone is home to 35 million people, with a land area of about 47,201square kilometers.
● The average annual rainfall of the coastal zone is 1700-3500 mm.
Growing picture of saline areas:
● 1973: About 8,320 sq km
● 2009: About 10,560 sq km
● 2024: About 11,000 sq km
● Salinity is increasing at a rate of about 0.5-1% per year, afecting 30-40 millionpeople.
● Most afected regions: Khulna, Satkhira, Bagerhat, Patuakhali.
Summary:
A long-term and integrated plan is essential to desalinate coastal areas. This challenge canbe addressed through increasing freshwater flow, building and maintaining infrastructure, environmentally friendly farming, and community participation.vara mama News
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