Author(s): Han Eun Jin; Yoo Min Wook; Kim Young Do; Lyu Siwan; Seo Il Won
Keywords: Masan Bay; Advection; Diffusion; Tide; RMA2; RMA4
Abstract: Estuaries such as Masan Bay are water bodies where fresh water and seawater meet to form a abroad range of tideland and blackish water zones. Estuaries have the predominant characteristic of being sites of spatial and temporal continua, for example in environmental variables such as salinity, and biological variables, such as community structure. Because of this, any superimposed classification scheme is likely to be arbitrary and thus subjectivity and to remove ambiguity in discussing estuarine features. In addition to the scientific need for classification and definition, there are an increasing number of legislative, administrative and socio-economic statutes, protocols, procedures and concern that require terms and areas to be defined. In these cases, the desire for precise and unambiguous terms is even more important as there may be substantial legal and/or economic repercussions of poor definition. Masan bay is typical closing bay in Korea. It is located 9 km from the open sea and most inside of Jinhae bay. The width of bay entrance is less than 1 km, where the flow velocity is very low. The large scale industrial complex of Masan bay is located in near Masan and Changwon city whose population is about 100 million. Because of low tidal velocity, the pollutants from the land are accumulated, which makes the water quality worse in Masan bay. The purpose of this study is to analyze the various hydraulic characteristics using RMA2 model. The advection and diffusion of pollutant is also simulated using RMA4 model according to the inflow of Changwon-stream and Namstream. The hydraulic simulations include the effect of tide which can be characterized by the tide data of Masan bay tide observatory.