키리바시 타라와 연안역에서의 OTEC플륨의 확산모델링

Abstract

The environmental impact assessment that can occur during installation and operation is carried out in accordance with EIA regulations of Kiribati through site investigation and data analysis. Thermal discharge from industrial outfalls is categorized into two major classes based on their density. First class is the effluent that has a higher density than that of the ambient water body. The second class is the effluent that has a lower density than that of the ambient water body. Due to the effect of several factors such as tides, waves, winds, river discharges, thermal effluents etc., the mixing characteristics of OTEC thermal plume is much complicated. In this study, tide and tidal current characteristics ofKiribati coastal waters were analyzed the EFDC (Environmental Fluid Dynamics Code) for the environmental impact assessment by OTEC installation. And, we try to identify the mixing and dispersion characteristics of coastal waters to consider their physical properties using a field observation and a three-dimensional numerical modelling with CFD (Computational Fluid Dynamics). The elevation, current, temperature and salinity boundary conditions on the open boundary and thermaleffluents at the specific boundary are considered in this study. Various turbulence models have been applied in the numerical model to assess the accuracy of turbulence models in predicting the effluent discharges in submerged outfalls. T