Sajek River

The Sajek River, also known as the Kasalong River, is a waterway that runs through the Chittagong Hill Tracts in Bangladesh and borders the Indian state of Mizoram. The river provides a vital role in drawing the border between India and Bangladesh. It is a lifeline for the communities living in the Sajek Valley, named after the river, and the surrounding areas. The river originates from the Karnaphuli River.

The Sajek River serves as a source of water for irrigation, drinking, and fishing. The communities living in the hills rely on the river for their daily needs, including agriculture and livestock rearing. The river water is used to irrigate the fields, which are cultivated with various crops such as rice, maize, and vegetables.

In addition to agriculture, the river also supports the fishing industry in the area. The local fishermen depend on the river to catch fish. The Sajek also plays a role in maintaining the ecological balance of the region. The river serves as a habitat for various aquatic plants and animals, including fish, crabs, and prawns. It also supports the growth of various trees and plants along its banks, which are crucial for the biodiversity of the area.

Course
A number of small streams originating from the eastern mountain range of Mizoram State of India join together in Bagaichhari area of Rangamati District to form the Kasalong River. The north-south flowing river empties into the Karnaphuli River (Kaptai Lake) at Kedarmara about 20 km north of Rangamati. The river is 65 km long and is dry throughout the year. The Kaptai Dam has facilitated the extraction of forest resources by making the river navigable far inland.