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Articles

Number 16 (2016)

Bathymetric Survey in the Coastal Area of Bangladesh - A Challenging Experience for the Surveyor

Submitted
September 22, 2017
Published
2016-11-30

Abstract

Hydrography in the coastal waters of Bangladesh has never been an easy task for surveyors. Being situated in the deltaic region, the area is very dynamic. Siltation, shifting of channels, emergence of new islands and low tide elevations, etc. are very common phenomena. Apart from a few common deltaic conditions experienced elsewhere, there are a number of local conditions which are peculiar to this area only. The coastal water is exceptionally laden with sediments coming from upstream and therefore, turbidity is extremely high and degrades the performance of survey equipment. The Monsoon in the region causes extra rainfall and seasonal cyclones add another dimension to the complexity of the area. Salinity is not homogeneous and sea temperature through the water column varies from place to place. The professionalism, prudence and dedication of the Bangladesh Navy surveyors are key factors for successful hydrographic survey operations in the area.