Methods for removing salinity in coastal areas

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.

Methods for removing salinity in coastal areas in Bangla language