Journal of the Indian Society of Remote Sensing

, Volume 41, Issue 4, pp 895–904 | Cite as

Drainage Analysis in a Part of the Brahmaputra Valley in Sivasagar District, Assam, India, to Detect the Role of Neotectonic Activity

Research Article
First Online:
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Accepted:

Abstract

An analysis of the drainage network of a part of Sivasagar district, Assam, India, is undertaken to reveal the role of neotectonic activity of the area. A number of fluvial geomorphic anomalies have been identified in the area. A prominent annular drainage anomaly is displayed by the major rivers—the Dikhu, Jhanzi, Namdang, Dorika and Disang, whose courses are carved in response to the ongoing tectonic deformation in the area. This study reveals that the development of topography and drainage system of the study area have been influenced by active subsurface geological structures. Formation of paleochannels, compressed meanders, reticulate streams, swamps, sagging of grounds, stream alignments, lineaments, knick points and abandonment of rivers as well as development of smaller drainage anomalies also substantiate the active nature of the subsurface structures.

Keywords

Geomorphic anomaly Tectonic deformation Neotectonic activity Drainage anomaly 
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Notes

Acknowledgment

The authors are grateful to Dr. P. G. Rao, Director, North East Institute of Science and Technology, Jorhat, for according the permission to carry out the research and publish this paper.

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Copyright information

© Indian Society of Remote Sensing 2013

Authors and Affiliations

  1. 1.GeoScience DivisionCSIR-North East Institute of Science and TechnologyAssamIndia
  2. 2.Department of Applied GeologyDibrugarh UniversityAssamIndia

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