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Sangu River has its source at 21°13ŽN and 92°37ŽE in the North Arakan Hills, which form the boundary between Arakan and the chittagong hill tracts. It follows a northerly circuitous course in the Hill Tracts up to bandarban. It enters the district from the east and flows west across the district and finally falls into the bay of bengal at the end of a course of 270 km (173 km within Bangladesh territory) at 22°6ŽN and 91°51ŽE about 16.09 km south of the mouth of the karnafuli.
The principal tributary of the Sangu is the Dolukhal,
which drains the Satkania plain. The Chand Khali flowing through the
Patiya plains also joins it on its right-bank. Further down, it is joined
by the Kumira Khali and ultimately falls into the Kutubdia Channel. The
Sangu is, therefore, a very important river in so far as it drains off
the waters of three important upazilas - patiya,
satkania
and banshkhali.
It has also a connection with the Karnafuli through the Chand Khali. The
Sangu is a shallow river but it becomes violent during rains with rapid
currents. It is navigable up to 48.27 km from the estuary. The Sangu gas
field is located about 50km southwest of Chittagong and stands at a depth
of 10 meters the Bay of Bengal.
[Sifatul Quader Chowdhury]
See map in
chittagong region river
system.
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