Morphometric Analysis of Digaru River Basin, Lohit District, Arunachal Pradesh

Abstract

Rivers are the dynamic process which tends to change the channel morphology and hydrological characteristics by the process of erosion and deposition. Drainage basin as a whole or its sub-basins is considered one of the most fundamental geomorphic units. So the study of various properties of rivers and drainage basins is quite pertinent. Such a study is useful in ascertaining the stages of geomorphic evolution of different basins, topographic characteristics, and hydrological conditions of the concerned area which inturn will provide necessary input for catchment management strategies. The Digaru River is an alluvial river which itself is dynamic system that adjust their geometry according to differential rates of stream flow (discharge) and sediment load. This research work tries to deal with the theoretical view on geomorphic basin and changes that is going on by quantitatively analysing the morphometric characteristics, because the existing geological and geomorphological informations on Lohit district are not adequate for evolving a valid and acceptable model for the geomorphic evolution of the catchment.