A river of central India flowing about 885 km (550 mi) north and generally east to the Bay of Bengal.
The other principal rivers in Bengal are the Sone, Gogra, Gandak, Kusi, Tista; the Hugh, formed by the junction of the Bhagirathi and Jalangi, and farther to the west, the Damodar and Rupnarayan; and in the south-west, the Mahanadi or great river of Orissa.
The principal hills are - (1) the Maikal range, situated in the north-western extremity of the district; (2) a chain of hills forming part of the Vindhyan range, on the north; (3) the Korba hills, an off-shoot of the Vindhyas, on the eastern boundary; and (4) the Sonakhan block of hills, in the vicinity of the Mahanadi river.
The Mahanadi is the principal river of the district, and governs the whole drainage and river system of the surrounding country.
m., and forms the upper basin of the Mahanadi.
The eastern part of the Nagpur country and the Chhattisgarh plain, comprising the Mahanadi basin, form the great rice tract of the province, its heavy rainfall and hard yellowish soil rendering it excellently adapted for the growth of this crop.