Morphotectonic analysis of Sonai River Basin,Assam,NE  India

Nandita Dutta; J. N. Sarma

Volume : II, Issue : II, February - 2013

Morphotectonic analysis of Sonai River Basin,Assam,NE India

Nandita Dutta, J. N. Sarma

Abstract :

The Sonai River Basin comprises a major part of the Barak river basin in the Barak Valley and is located south of Barak River, North East India. The study area has been investigated for geomorphic signatures of active tectonics using Geographical information system (GIS). Most commonly used geomorphic indices for morphotectonic analysis, viz. basin elongation ratio (Re), transverse topographic symmetry (T), asymmetric factor (AF), valley floor width to valley height ratio (Vf), mountain front sinuosity (Smf) have been used. The values of (Re), (T), and (AF) indicate that Sonai river is a tectonically active basin. The values of (Vf) and (Smf) suggest lesser activity but still reflecting the evidences of tectonically active structures in the area.