The Mahanadi delta in the east coast of Peninsular India has an arcuate shape, and covers an area of about 9, 000km2
with a maximum width of 140km. Among the important geomorphic features recognized on the delta are active distributary channels, dead or defunct channels, ancient beach ridges, coastal sands, tidal flats, swamps, and spits. The sediments brought by the Mahanadi River are distributed by riverine and marine agents to give rise to a broad deltaic plain. Waves, winds and littoral currents have played an important role to rework the deltaic sediments and have been responsible for the development of the sea-marginal transition zone of the delta plain. Based on the disposition of the geomorphic features, four major stages are recognized in the evolution of the delta.