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River bank erosion vulnerability demarcation based on the sensitivity analysis of geotechnical parameters: Majuli Island, India

River bank erosion vulnerability demarcation based on the sensitivity analysis of geotechnical... The present study assesses the vulnerability of the river bank area most sensitive to erosion by combining the data obtained from existing literature and performing numerical simulation using finite element-based numerical code. Various geotechnical parameters, like average particle size (D50), Plasticity Index (PI), Elastic Modulus (E), Dry Unit Weight (γd) or Saturated Unit Weight (γsat), Coefficient of Permeability (k), Undrained Shear Strength (cu), Moisture Content (w%) and soil types based on the Unified Soil Classification System (USCS), were taken into account. Weighted Ranking Analysis (WRA) was performed based on the sensitivity of relevant geotechnical factors affecting bank erosion. The results indicate that the areas influenced by the Subansiri River (western bank) and the Brahmaputra River (southern bank) fall in the highly vulnerable zone category, while the Luhit and Kherkutia Suti Rivers (northern bank) fall in the moderately vulnerable category to river bank erosion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Water Engineering and Research Taylor & Francis

River bank erosion vulnerability demarcation based on the sensitivity analysis of geotechnical parameters: Majuli Island, India

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References (9)

Publisher
Taylor & Francis
Copyright
© 2023 IAHR and WCCE
ISSN
2324-9676
DOI
10.1080/23249676.2023.2256223
Publisher site
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Abstract

The present study assesses the vulnerability of the river bank area most sensitive to erosion by combining the data obtained from existing literature and performing numerical simulation using finite element-based numerical code. Various geotechnical parameters, like average particle size (D50), Plasticity Index (PI), Elastic Modulus (E), Dry Unit Weight (γd) or Saturated Unit Weight (γsat), Coefficient of Permeability (k), Undrained Shear Strength (cu), Moisture Content (w%) and soil types based on the Unified Soil Classification System (USCS), were taken into account. Weighted Ranking Analysis (WRA) was performed based on the sensitivity of relevant geotechnical factors affecting bank erosion. The results indicate that the areas influenced by the Subansiri River (western bank) and the Brahmaputra River (southern bank) fall in the highly vulnerable zone category, while the Luhit and Kherkutia Suti Rivers (northern bank) fall in the moderately vulnerable category to river bank erosion.

Journal

Journal of Applied Water Engineering and Research – Taylor & Francis

Published: Sep 13, 2023

Keywords: Majuli Island; weighted ranking analysis; numerical analysis; sensitivity analysis; geotechnical parameters

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