Improvement of Tidal Circulation in a Closed Bay using Variation of Bottom Roughness

J. Ocean Eng. Technol. 2005;19(1):1-7.

BOO SUNG YOUN;

Department. of Naval Architecture, Korea Naval Academy;

해저조도 변화를 이용한 폐쇄성 만의 해수순환 개선

부성윤;

해군사관학교 조선공학과;

Keywords: Bottom Roughness, Tidal Circulation, Multi-level Model, Residual Current, Volume Flow Rate

핵심용어: 해저조도, 해수순환, 다층모델, 잔차류, 해수교환량

Abstract

Tidal circulation in a closed bay using a variation of bottom roughness was investigated through the numerical experiments based on a finite difference multi-level model. Various distributions of bottom roughness in the bay were implemented to determine their effects. It hadbeen determined that residual currents can be generated from the differences of the bottom roughness between streaming and reverse flow directions. The magnitude of residual currents and volume flow rate increase when the relative ratio of bottom roughness between streaming and reverse flow directions increase. Circulation in the closed bay is also improved by the employment of the change of bottom roughness.