Analysis of Hydraulic Characteristics and Reduction of Bottom Velocity of Second Stilling Basin 


Vol. 33,  No. 5, pp. 134-140, Oct.  2018
10.14346/JKOSOS.2018.33.5.134


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  Abstract

Scour in the downstream of hydraulic structures such as apron induces to collapse due to abruptly increasing rainfall and discharge in streams and reaches. This is because the forcible jet from overflowing is not sufficiently dissipated by existing energy dissipators, and it continues to sweep the bed materials during flood events. In this study, a second stilling basin was proposed as a countermeasure and the energy dissipation efficiency of this structure was analyzed using 3D-dimensional numerical analysis. First, results from previous research and hydraulic tests were used to verify the accuracy of the numerical model. It showed that the second stilling basin played a definite role in reducing the bottom velocity, comparing with diminishing the energy dissipation when numerical tests were conducted under scaled field conditions in Korea. This means that the second stilling basin can be a countermeasure against scour in downstream. If more efficiency analysis of the second stilling basin would be performed in terms of energy dissipator for various types of hydraulic jump, it would be an alternative solution to scouring issues.

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  Cite this article

[IEEE Style]

정석일, 이지훈, 윤재선, 이승오, "Analysis of Hydraulic Characteristics and Reduction of Bottom Velocity of Second Stilling Basin," Journal of the Korean Society of Safety, vol. 33, no. 5, pp. 134-140, 2018. DOI: 10.14346/JKOSOS.2018.33.5.134.

[ACM Style]

정석일, 이지훈, 윤재선, and 이승오. 2018. Analysis of Hydraulic Characteristics and Reduction of Bottom Velocity of Second Stilling Basin. Journal of the Korean Society of Safety, 33, 5, (2018), 134-140. DOI: 10.14346/JKOSOS.2018.33.5.134.

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