Karnaphuli (
Kôrnophuli; also spelt
Karnafuli), the largest and most important river in
Chittagong and the
Chittagong Hill Tracts, is a wide river in the south-eastern part of
Bangladesh. Originating from the
Lushai hills in
Mizoram,
India, it flows southwest through Chittagong Hill Tracts and Chittagong into the
Bay of Bengal. A large
hydroelectric power plant using Karnaphuli river was built in the
Kaptai region during the 1960s. The mouth of the river hosts Chittagong's sea port, the main port of Bangladesh.