Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Impact of Parameters of Nonlinear Breach Progression Curve on Outflow Rate

저수지 붕괴함수의 매개변수 결정이 유량과 침수범위에 미치는 영향

  • Lee, Khil-Ha (Department of Civil Engineering, Daegu University)
  • Received : 2018.11.26
  • Accepted : 2018.01.12
  • Published : 2019.02.28
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Abstract

A Numerical modeling approach is usually applied to reproduce the physical phenomena of a fill dam-break. The accuracy of the dam-break model depends on the physical structure that defines input variables such as the storage volume, breach formation and progress, and the parameters of the model, which are subjective as they are prescribed by users. In this study, a sensitivity analysis was performed for the nonlinear breach progression curve that was already developed, which includes four parameters. The study focuses on the two of the parameters which control the breach forming time and peak discharge. The model is coupled with a two-dimensional flood simulation model (FLO-2D) to examine flood coverage and depth. It is generally observed that the parameter ${\beta}$ controls only the breach forming time, the parameter ${\gamma}$ is particularly sensitive to the peak flow.

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References

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