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Simulation of Mixing Transport on Inner Reservoir and Influence Impacts on Outer Region for the Saemankeum Effluents Caused by Gate Operation  

Suh Seung-Won (Department of Ocean System Engineering, Miryong, Kunsan)
Cho Wan-Hei (Department of Ocean System Engineering, Miryong, Kunsan)
Yoo Gyeong-Seon (Department of Ocean System Engineering, Miryong, Kunsan)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.18, no.1, 2006 , pp. 43-52 More about this Journal
Abstract
Numerical model tests are done in order to evaluate impact zone of low salinity water on outer region of the developing Saemankeum reservoir. Also saline mixing processes are investigated f3r the inner reservoir with consideration of Mankyoung and Donjin riverine flood discharges when sea water is passing freely through gate. In these analyses 2-d ADCIRC, 3-d TIDED3D and CE-QUAL-ICM models are used. Through models tests, it is found that inner reservoir mixing process caused by inflow of outer sea water occurs gradually. It takes at least one month for complete mixing on Mankyoung part and 6 month on Dongjin part of the reservoir. When Sinsi or Garyeok gates are opened to control inner reservoir level, discharging velocities decrease exponentially from the gates, but show very strong currents of 0.5m/sec to the 10Km region apart. These results imply that hydrodynamic circulation and ecosystem of frontal region of the Saemankeum dike might be affected in amount by gate operations, since low saline inner waters are discharged periodically at ebb tide according to tidal level.
Keywords
Saemakeum reservoir; gate operation; low saline water; discharge; diffusive mixing; 3-D ICM;
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