Nagar River  There are two rivers in the country named the Nagar. The first one originates from the karatoya near shibganj upazila in bogra district. It flows southwest and then turns south to meet the atrai river at singra upazila in natore district. The Nagar receives a tributary from the north which provide its major flow. The total length of the river is about 105 km. On its course, the river demarcates the boundaries between the upazilas of Dupchanchia-Kahaloo (Bogra district), Adamdighi-Nandigram (Bogra district) and Raninagar (Naogaon district)-Nandigram (Bogra district).

The other Nagar river is a trans-boundary river that enters the country through panchagarh district. Flowing southwest and then southward, the river again crosses the international boundary near haripur in the thakurgaon district. The river defines the boundary between India and Bangladesh in various places on its course. The length of the river in the Bangladesh part is about 125 km. The river causes flash floods at times but does little harm. It becomes dry in the lean period, but the local farmers dam the water of the wet season for irrigation. [Md Mahbub Murshed]

See map in brahmaputra-jamuna river system.