The coastline of Bangladesh, ignoring all the tidal channels and delta estuaries, is some 654 km long from the Indian border in the west to the Burmese border in the southeast ( Fig. 17.4.1). The total length of coast, going around all the islands and up the estuaries, is estimated to be nearly 1,320 km. However, the width of the tidal channels, particularly in the Sundarbans, is impossible to measure with any precision, since the Bengal 1:250,000 scale maps are not very accurate. There is also the problem of how far inland the coastline should be considered to extend; tidal estuaries in places reach as far as 130 km inland, and storm surges may drive the Bay of Bengal waters up to 160 km inland.
KeywordsClay Depression Shale Beach Silt
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