Study in Bottom Velocity Distribution Around Opening of Impermeable Artifical Reefs

Abstract

Artificial reefs have been constructed for protecting coast from erosion and for replacing detached breakwaters . The construction causes topographical change around them. Bottom flow and water surface variation and others caused topographical change. So the experiment using 3-ADV (Acoustic Doppler Velocity Meter) to measure the bottom velocity profile around opening was carried out. And the topographical change by movable bed was investigated.This study shows the result of the distribution of bottom velocity around opening . The result shows that the mean velocity of flow at offshore side of reef was different from that at shore side reef . The former region has cyclic current field. And the change of topographical flux was nearly equals to the calculation results that using the Brown's theory and incident wave conditions.

Hydraulic Characteristics Investigation due to the Change of GapWidth between Artificial Reefs

“…. 인공리프 주변에서의 지형변화에 대해서는 Johnson et al(2005), Minami and Mano(2002), *가톨릭관동대학교 토목공학과(Corresponding author: Kyu-Han Kim, Civil Engineering, CatholicKwandong University, 24 Beomil-ro 579beongil, Gangneung-si, Gangwon-do 25601, Korea, Tel:+82-33-643-3436, Fax:+82-33-647-3436, khkim@cku.ac.kr) Uda et al(2009), Kimura et al(2010)등에 의해 실험적인 연구 등이 진행된바 있으나, 국내의 경우에는 현장조사를 통 하여 인공리프의 효용성을 검토한 연구 (Kim and Shin(2014), Kim et al(2016)…”