Effect of Water Level Fluctuation on Riverbank Stability at the Estuary Area of Muaro Kualo Segment, Muara Bangkahulu River in Bengkulu, Indonesia

Authors

  • Lindung Zalbuin Mase University of Bengkulu
  • Khairul Amri University of Bengkulu
  • Muhammad Farid University of Bengkulu
  • Fandi Rahmat University of Bengkulu
  • Muharram Nur Fikri University of Bengkulu
  • Jihan Saputra University of Bengkulu
  • Suched Likitlersuang Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2022.26.3.1

Keywords:

estuary area, slope failures, rainfall intensity, finite element method, flood

Abstract

The paper presents an investigation of riverbank stability at the estuary area of Muaro Kualo Segment, Muara Bangkahulu River in Bengkulu, Indonesia. This area had experienced slope failures along the riverbank during the Bengkulu flood in 2019. This study is initiated by conducting a geotechnical survey to observe site condition. During the survey, slope geometry measurement and soil sampling are performed. The laboratory tests are performed to collect physical and engineering soils properties. The rainfall intensity during period of 2011-2020 is also collected to observe normal and critical river water level. The finite element method is employed to analyse the slope stability analysis under the normal and critical river water level conditions. The results showed that the slope failure is generally initiated at the slope toe. Because of the river water level, factor of safety of slope along the estuary is less than the minimum criteria for the stable slope. It indicates that slope failure is very possible to occur. Implementation of sheet pile is conducted to reduce the slope failure potential.  The results showed that the use of sheet pile is relevant to improve slope stability in the study area.

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Author Biographies

Lindung Zalbuin Mase

Department of Civil Engineering, Faculty of Engineering, University of Bengkulu, Bengkulu, Indonesia

Khairul Amri

Department of Civil Engineering, Faculty of Engineering, University of Bengkulu, Bengkulu, Indonesia

Muhammad Farid

Department of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Bengkulu, Indonesia

Fandi Rahmat

Department of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Bengkulu, Indonesia

Muharram Nur Fikri

Department of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Bengkulu, Indonesia

Jihan Saputra

Department of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Bengkulu, Indonesia

Suched Likitlersuang

Centre of Excellence in Geotechnical and Geoenvironmental Engineering, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand

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Published In
Vol 26 No 3, Mar 31, 2022
How to Cite
[1]
L. Z. Mase, “Effect of Water Level Fluctuation on Riverbank Stability at the Estuary Area of Muaro Kualo Segment, Muara Bangkahulu River in Bengkulu, Indonesia”, Eng. J., vol. 26, no. 3, pp. 1-16, Mar. 2022.