Analysis of Tidal Asymmetric Characteristics in the Muan Bay

摘要

Tidal asymmetry would occur owing to shallow water tides at the Western Coast of macro tidal area.Especially,as ebb dominance of Mokpo coastal zone is known as the most prominent in Korea,it had been studied by domestic researchers.The cause of ebb dominance in Mokpo area is considered due to extensive inter-tidal zone in Muan Bay,and this has been studied based on amplification ratio,relative phase and skewness of tide/tidal flow curves in order to analyze qualitative tidal asymmetry.Furthermore,it was possible to figure out tidal characteristics with the difference of tidal amplitude and phase with Mokpo Harbor by observing the tide for 15 days in Muan Bay,which showed 40 minutes shorter ebbing time than at Mokpo Harbor.In addition,tidal flow prediction data in Mokpo North Harbor and Mokpo-Gu were analyzed.Meanwhile,the basis regarding qualitative interpretation of bed sediment and suspended sediment was provided by examining the qualitative changes in tidal asymmetry for spring-neap tidal cycle through the PCA/SWA indices.In addition,by examining long-term changes of ebb dominance in Mokpo Port,tidal characteristics of the past,present and future in this area,which is related to tidal asymmetry,is also provided.