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http://dx.doi.org/10.5322/JESI.2019.28.2.211

Impact of Parameters of Nonlinear Breach Progression Curve on Outflow Rate  

Lee, Khil-Ha (Department of Civil Engineering, Daegu University)
Publication Information
Journal of Environmental Science International / v.28, no.2, 2019 , pp. 211-217 More about this Journal
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.
Keywords
Dam-break; FLO-2D; Sensitivity; Breach;
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