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2021 | OriginalPaper | Chapter
Study on Stability Analysis of South Bank of River Brahmaputra and Its Tributaries in the Reaches of Upper Assam
Authors : Khagana Buragohain, P. K. Khaund
Published in: Proceedings of the Indian Geotechnical Conference 2019
Publisher: Springer Singapore
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Abstract
This work presents the results of an investigation aimed at evaluating the stability of riverbanks along the Brahmaputra River and some of its Southern tributaries—Burhidihing, Disang, Jhanji, Bhogdoi and Kakodonga. Continuous erosion and failure of the alluvial riverbanks have led to serious loss of land, life and property, and an attempt has been made to address the same. Soil samples were collected from the seven riverbank sites and the geotechnical characteristics of the samples were determined. Stability analysis was carried out based on a Culman-type analysis of steep, cohesive riverbanks proposed by Osman and Thorne (J Hydraul Eng, ASCE 114(2):134–150, [1]). The riverbank stability is checked for bank angles ranging from 60° to 85°. Critical bank angles are determined and the factor of safety (FOS) is computed. Attempts have been made in this work to address the stability of the riverbanks of the proposed sites and thereby help to adopt necessary measures to mitigate such failures.