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Most of Bangladesh is at low
elevations and is divided into five physical regions: (I) the Ganges Delta
to the Southwest, (II) the Paradelta to the Northwest, (III) the East
Central plains and the Sylhet Hills in the Northeast, and (IV) the
Chittagong region in the Southeast. Bangladesh is the largest deltaic region
in the world. The Ganges Delta is geologically the most recent compared with
other deltas. Mangrove forests thrive in the lower delta, which is flooded
by fresh tidal waters. The soil base is new alluvium. The Sundarbans to the
Southwest is the largest mangrove forest in the world. The Paradelta, like
the delta proper, is a plain but its elevations are higher at 100 to 300
feet above sea level. Its soils are varied - silt and sandy clays and old
alluvium. It lies between the Ganges and the (Brahmaputra) Jamuna Rivers.
The East Central plains, with the Meghna River almost at its centre,
consists of plains and active floodplains in which the main rivers,
including the Brahmaputra, have altered their channels in the past. At the
centre of this plain lies Madhupur Forest, a former site for tiger hunting.
To the Northeast is the Meghna depression, part of which is only 10 feet
above sea level; during the rainy season it turns into a huge lake, covering
most of its 7,250 square kilometer (2,800 square mile) basin. Bangladesh is
a riverine country and is criss-crossed by innumerable rivers, rivulets and
their tributaries.
* Excerpted from resources of Bangladesh Embassy in
Washington D.C.
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