Author(s): Hong Koo Yeo; Joon Gu Kang; Young Sin Rho
Linked Author(s): Joon-Gu Kang
Keywords: Groyne; Recirculation area; Aquatic Habitats; Critical Swimming Speed
Abstract: The field formed by groyne has the function of aquatic habitats for the underwater biology. The characteristic of groyne field occurring around downstream of groyne is depending on groyne type and shape. Thus to maximize the function of groyne, it needs to understand the flow characteristic around groyne. In this study, experiment model test was conducted in recirculation zone located in downstream of groyne. Groyne types for experiment are three; permeable, impermeable and inclined crest groyne. LSPIV (Large Scale Particle Image Velocimetry) used to measure flow field around the groyne and it revealed flow characteristic in recirculation zone at each case. In order to estimate the aquatic habitats of groyne fields, critical swimming speed of major fleshwater fish in Korea were compared with the variation of velocity distribution in groyne fields. From the results, the rate of velocity decreasing in groyne fields, V/Vapp were measured 0 to 0. 5 and this results can be fundamental data which used to estimate the aquatic habitable function of groyne.
Year: 2007