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This study has been undertaken to predict the bank failure mechanism of Padma River at Paturia ferry ghat of Bangladesh regarding bank materials. In this context, laboratory test results of soils and water levels were analyzed. From the analysis, it has been observed that the low flood level at Paturia ferry ghat varies from 1.8 to 2.0 mPWD at which the bank materials are non-cohesive. However, the high flood level varies from 7 to 9 mPWD which exceeds the bank elevation of bank line 6.667 to 6.935 mPWD, where the materials from the bank line to the ground surface are cohesive layers containing 30% clay. The presence of such clay particles creates a higher level of bonding among the other particles which are more resistant to surface erosion because of their lower permeability. These soils are more susceptible to bank failure during the rapid drawdown of water levels due to the increases in pore pressures which lead to tension cracks. The study results will inform the design engineer about the bank failure mechanism; however, a comprehensive geotechnical investigation will be needed prior to the design for the protection of the Paturia ferry ghat.

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Prediction of Stream Bank Failure at Paturia Ferry Ghat of Padma River of Bangladesh in Terms of Bank Materials

  • 章节

  • 发表日期：

    2025年

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  • Uma Saha,
  • Fatima Rukshana,
  • Nayan Chandra Ghosh,
  • Md. Moniruzzaman,
  • Sumiya Ferdhous,
  • Bikash Roy,
  • Kazi Rezaul Karim

摘要

This study has been undertaken to predict the bank failure mechanism of Padma River at Paturia ferry ghat of Bangladesh regarding bank materials. In this context, laboratory test results of soils and water levels were analyzed. From the analysis, it has been observed that the low flood level at Paturia ferry ghat varies from 1.8 to 2.0 mPWD at which the bank materials are non-cohesive. However, the high flood level varies from 7 to 9 mPWD which exceeds the bank elevation of bank line 6.667 to 6.935 mPWD, where the materials from the bank line to the ground surface are cohesive layers containing 30% clay. The presence of such clay particles creates a higher level of bonding among the other particles which are more resistant to surface erosion because of their lower permeability. These soils are more susceptible to bank failure during the rapid drawdown of water levels due to the increases in pore pressures which lead to tension cracks. The study results will inform the design engineer about the bank failure mechanism; however, a comprehensive geotechnical investigation will be needed prior to the design for the protection of the Paturia ferry ghat.