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Role of Actual Evaporation on the Stability of Residual Soil Slope

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Abstract

Tropical countries like Singapore are associated with high relative humidity, high temperature, and high amount of rainfall throughout the year. Therefore, flux boundary conditions of slopes are affected by rainwater infiltration and evaporation rate. The research aims to examine the stability of a residual soil slope under arid and damp period conditions. The actual evaporation was utilized in combination with rainfall as flux boundary conditions in the mathematical investigations to study the impact of actual evaporation on the distribution of pore-water pressure and factor of safety variation in residual soil slope. The significance level of actual evaporation in the stability analysis of residual soil slope was tested by performing two instances of seepage analysis on a slope subjected to (1) rainfall only and (2) rainfall and estimated evaporation. The data from the field instrumentation was compared with pore-water pressure variations in residual soil. It was observed that actual evaporation should be incorporated in the numerical analyses as a flux boundary condition in addition to rainfall loading since both actual evaporation and rainfall have a significant effect in generating accurate factor of safety variations and pore-water pressure distribution within soil layers.

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Acknowledgements

This research was supported by the Nazarbayev University Research Fund under Social Policy Grant and 11022021CRP1512. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the Nazarbayev University.

Funding

Funding is provided by Nazarbayev University (Grant No. 11022021CRP1512 and Social Policy Grant).

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Authors and Affiliations

  1. Postgraduate Program Universitas Bina Darma, Palembang, Indonesia

    Nurly Gofar

  2. Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan

    Alfrendo Satyanaga

  3. Department of Civil Engineering, Universitas Kristen Maranatha (Maranatha Christian University), Bandung, Indonesia

    Robby Yussac Tallar

  4. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, Singapore

    Harianto Rahardjo

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  1. Nurly Gofar
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  2. Alfrendo Satyanaga
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  3. Robby Yussac Tallar
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  4. Harianto Rahardjo
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Correspondence to Alfrendo Satyanaga.

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Gofar, N., Satyanaga, A., Tallar, R.Y. et al. Role of Actual Evaporation on the Stability of Residual Soil Slope. Geotech Geol Eng 40, 4585–4594 (2022). https://doi.org/10.1007/s10706-022-02172-z

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  • DOI: https://doi.org/10.1007/s10706-022-02172-z

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