Abstract
Land loss due to beach erosion caused by sea level rise in the eastern coastline of Bangladesh was calculated by using Brunn’s formula. Estimation was done for three distinct areas: a) Bakkhali river valley b) Southern beach plain c) Nilla-Teknaf plain. In addition Moheskhali channel area was also studied. The slope of this coastline was measured by conducting a survey at 21 different points along north-eastern coast considering coastline profile taken at 900 angle with respect to sea. These points were interpolated to define the coastline profile. Real world geographical location of each point was captured using Geographical Positioning System (GPS) and subsequently the shoreline profile was coupled with a GIS system.
Bathymetric information was drawn from admiralty charts from which height (depth of water) and width of the continental shelf were determined. Brunn’s formula gave the values for shoreline recession for 30 and 75 cm sea level rise for the year 2030 and 75, respectively.
It was found that about 5,800 ha area along the shoreline would be lost in 2030, while 11,200 ha would be recessed in 2075. It was also found that about 13,750 and 252,000 tons of food grain production would be lost in 2030 and 2075, respectively, due to shoreline erosion.
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© 1999 Springer Science+Business Media Dordrecht
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Islam, S.M.R., Huq, S., Ali, A. (1999). Beach Erosion in the Eastern Coastline of Bangladesh. In: Huq, S., Karim, Z., Asaduzzaman, M., Mahtab, F. (eds) Vulnerability and Adaptation to Climate Change for Bangladesh. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9325-0_6
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DOI: https://doi.org/10.1007/978-94-015-9325-0_6
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