만내의 해수유동에 관한 실험적 연구

Abstract

Recently, the water pollution of coastal sea area including harbor, bay and inland sea has been very serious and it causes various environmental impacts.

Generally the quality of seawater is influenced by the amount of exchanging water volume. Especially, closed water such as the closed harbor or the bay with narrow mouth is likely to be polluted, because the flux of water is limited to the entrance of the harbor or the bay. Hence, the development of prediction technique, which can evaluate the amount of water flux and water circulation system within the closed water, is demanded.

In this study, water flow system of Danghang Bay, which has the narrow and long topographical characteristics with the narrow bay mouth and its flow is influenced principally by the tidal current, is investigated experimentally and numerically.

In order to understand the tidal system of Danghang Bay, harmonic analysis is performed based on measured tidal range and flow velocity. In addition, numerical model for tidal exchange is developed considering conditions of Danghang Bay. Calculated results show good agreement with measurements. Lastly, based on the proposed numerical model, exchange ratio of seawater volume in Danghang Bay is predicted.