The local rainfall run off of the valley along with that of adjacent hilly areas flows through river Barak and its various tributaries and is drained out to Bangladesh. The Katakhal(Dhaleshwari), Jiri, Chiri, Modhura, Longai, Sonai, Rukni and Singla are the main tributaries of the valley.
The local runoff from the valley, along with that of adjacent hilly areas, flows through the river Barak and its tributaries, ultimately draining into Bangladesh. The Katakhal(Dhaleshwari), Jiri, Chiri, Modhura, Longai, Sonai, Rukni, and Singla are the main tributaries of the valley.