List of rivers of Assam
Jamuna - The river Jamuna is one of the longest rivers of Karbi Anglong district. Diphu river and Dillai (Manja river) joins near Manja town and flows westward and meets  the Longnit river (Siloni river) and Megongdisa river. These combine waters then flow west northwestward and come to known as Jamuna in the plains. Famous picnic spot Sylveta is over this river in the hills on the side of NH 36 near Disobai.