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Spatial Variation of Sea Level Trend Along the Bangladesh Coast

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Abstract:

The Bangladesh coast is threatened by rising sea level due to various factors. The results based on the analysis of past 22 years of tidal data of the Bangladesh coast reveal that the annual mean tidal level in the eastern Bangladesh coast is rising at an alarmingly high rate of 7.8 mm/year, which is almost twice the observed rate in the western region. This type of sea level trend seems to be the result of changing local conditions like increased precipitation and land subsidence during the recent decades. It seems that the higher rate of land subsidence in the eastern Bangladesh coast is the main causative factor for the steeper sea level trends there. The differential sea level trends show that the subsidence component in the sea level rise may be as high as 4 mm/year in the eastern Bangladesh coast. However, this needs to be verified with actual geological observations.

Keywords: BENGAL DELTA; MEAN TIDAL LEVEL (MTL); SPATIAL VARIATION; SUBSIDENCE; TREND

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/01490410290051536

Publication date: July 1, 2002

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