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Slope stability evaluation of an agricultural embankment by statistically derived rainfall patterns

  • Jaesung Park
  • Khonesavanh VilayvongEmail author
  • Younghwan Son
  • Kazunori Fujisawa
  • Akira Murakami
Article

Abstract

Torrential rainfall has a detrimental impact on the stability of soil-based agricultural embankments due to seepage and slope failure. The impact on the stability of an embankment due to rainfall patterns is specific to the geography, topography, and geometry of the embankment. However, this stability has not been widely assessed and updated with respect to new climate regimes. In this study, the slope stability of an agricultural embankment was evaluated based on five synthetic rainfall patterns derived from actual heavy rainfall events. The rainfall patterns were generated based on common patterns of rainfall hyetographs used in hydrological design and practice. The stability of the embankment was computed using the limit equilibrium method. Results of the stability analyses revealed time-series slope instability under rainfall patterns, and particularly the rainfall pattern that caused the most instability to the embankment was identified. Therefore, reassessment of the stability of the embankment in potential areas prone to heavy rainfall and flooding is beneficial to the preparation of early warning and emergency planning and preparedness as countermeasures for mitigating sediment-related hazards and disasters.

Keywords

Climate change Embankment dam Rainfall pattern Slope stability Unsaturated soil 

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Copyright information

© The International Society of Paddy and Water Environment Engineering 2019

Authors and Affiliations

  • Jaesung Park
    • 1
  • Khonesavanh Vilayvong
    • 2
    Email author
  • Younghwan Son
    • 3
  • Kazunori Fujisawa
    • 2
  • Akira Murakami
    • 2
  1. 1.Department of Bioresource EngineeringMcGill UniversitySte-Anne-de-BellevueCanada
  2. 2.Graduate School of AgricultureKyoto UniversitySakyo-kuJapan
  3. 3.Department of Rural Systems Engineering, Research Institute for Agriculture and Life SciencesSeoul National UniversitySeoulRepublic of Korea

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