Instability of Embankment Slopes Due to Overflow and Drawdown

Jaehong Kim, Yongmin Kim, Alfrendo Satyanaga

Research output: Contribution to journalArticlepeer-review

Abstract

Establishing a geotechnical rationale for an embankment overflow is challenging. The occurrence of embankment overflow is deemed unlikely since the initial highest water level of the embankment is assumed to be fixed as a designed flood water level or a seasonal flood-limited water level when calculating the rainfall amount in the hydrological stability analysis. However, the possibility of overtopping can be assessed by employing copula functions. This approach takes into account the return frequency of overflow and the fluctuation of probable water levels due to climate change rather than relying on the fixed highest water levels of an embankment. This study examined the effect of tensile cracks leading to the shallow failure of embankment slopes during drawdown and placed an emphasis on the vulnerability of embankment slopes due to extreme rainfall events. Throughout the comprehensive numerical simulations, it was found that the critical period for embankment slope collapse was immediately after drawdown for the upstream slope and during the initial stages of overflow for the downstream slope.

Original languageEnglish
Article number3402
JournalWater (Switzerland)
Volume15
Issue number19
DOIs
Publication statusPublished - Oct 2023

Keywords

  • drawdown
  • embankment risk analysis
  • hydrological analysis
  • overtopping
  • slope stability
  • tension crack

ASJC Scopus subject areas

  • Biochemistry
  • Geography, Planning and Development
  • Aquatic Science
  • Water Science and Technology

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