Numerical Simulation of the Formation of Oxygen Deficient Water-masses in Jinhae Bay

摘要: Jinhae Bay once was a productive area of fisheries. It is, however, now notorious for its red tides; and oxygen deficient water-masses extensively develop at present in summer. Therefore the shellfish production bay has been decreasing mass mortality often occurs. Under these circumstances, three-dimensional numerical hydrodynamic material cycle models, which were developed by Institute Resources Environment Japan, applied to analyze processes affecting depletion also evaluate environment capacity reception pollutant loads without dissolved depletion. In field surveys, formed with concentrations below 2.0mg/l bottom layer Masan western part during Current directions, computed constituent, mainly toward flood flows opposite directions ebb flows. Tidal currents velocities tide stronger than that tide. The comparision between simulated observed tidal ellipses showed fairly good agreement. residual currents, obtained averaging over 1 cycle, presence counterclockwise eddies central Bay. Density driven generated southward surface northward Jindong Bay, where fresh water rivers entered. model calibrated data surveyed study from June July, 1992. results are agreement measured values within relative error . distributions relatively high concentration boundaries, but an inner sensitivity analyses sediment demand(SOD) one most important influence on formation Therefore, control conserve coastal environment, it is effective method reduce SOD improving polluted sediment. As simulations, recovered 5.0mg/l when reduction input COD basin conducted. culturing ground fecal