Kaptai Lake the largest man-made freshwater body in Bangladesh. Though created primarily for hydroelectric power generation, it contributes to produce significant quantity of freshwater fishes, navigation, flood control and agriculture, etc. The reservoir was created by damming the river
karnafuli near
kaptai town in the
chittagong hill tracts (Latitude 22º09´N and Longitude 92º17´E). The lake is confined within the hill district
rangamati and embraces the upazilas of Rangamati Sadar, Kaptai, Nannerchar, Langadu, Baghaichhari, Barkal, Juraichhari and Belaichhari.