Fluvio-geomorphology of the river Bhogdoi, Assam, India

Bhogdoi is one of the south bank sub-tributaries of mighty river Brahmaputra. Bhogdoi, known in its upper part as Disoi originates at Long Samtang of Mukokchung district of Naga Hills. Near the source, the river is known as Tsujenyong Nala. Until the last part of the nineteenth century Bhogdoi river was an active tributary of Brahmaputra. It had its mouth to Brahmaputra at a place north west of present Badulipara of Golaghat district. Following the great earthquake of 1897, Bhogdoi lost its direct link with the main stream as there developed a system of wetlands in between these two rivers. For such circumstances, the Bhogdoi River became sub-tributary of the great Brahmaputra in place of its earlier identity. The river collects water from an area measuring 945.88 sq. km to pour at its mouth to Kakadonga River of Golaghat district, Assam.

In this paper, an attempt is taken to study the river Bhogdoi- its basin, geographical history, river course, channel and flow characteristics. Moreover, attempt is taken to understand the flood situation of the river based on data collected from both authentic primary and secondary sources. The main objective of this study is to understand the fluvio-geomorphology of the river in brief.