A Study on Changes in Salinity and Water Quality for Runoff and Seawater Inflow in Yongwon Channel, Korea

Jin Kyoung Han, Eun Jin Han, Yuong Do Kim, Weon Mu Jung

Friday 3 july 2015

12:48 - 12:51h at Oceania (level 0)

Themes: (T) Hydro-environment, (ST) Ecohydraulics and ecohydrology, Poster pitches

Parallel session: Poster pitches: 15K. Deltas - Wetland

In Yongwon channel, its natural flow of seawater is blocked by the construction of Busan Newport including the container wharf. The channel was transformed into a narrow and long one, where it is possible that ships are only allowed to pass through the north-side channel of Gyeonmado located at the point of river mouth to Songjeongcheon. In addition Yongwon channel is substantially 100 m wide on average and 3,600 m long, which has the highest slenderness ratio (length/width=36). So it is considered that the changes in the terrain characteristics of Yongwon Channel is likely to alter the circulation of sea water, thereby changing its water quality. In this study, the seasonal change and the spatial variation of the water quality in Yongwon channel was analyzed for the effect of land pollution using the measurement data. This result shows that the improvement of the water quality in Yongwon channel can be obtained from the sewer pipe modification and the environmental dredging. EFDC (Environmental Fluid Dynamics Code) model is us to simulate the salinity distribution for seawater inflow and rainfall runoff. Thus utilizing the water quality monitoring data Yongwon channel, to perform analysis multilateral. It is an object of the present invention presentation of the results of the trend test results and analysis of salinity and surface water quality variation and reliable objective. Yongwon channel environment improvement measures findings pollution sources and materials used in the analysis of salinity and surface water quality variation, and trying to provide the basic data for environmental management.