고리 주변해역 수괴의 계절별 공간 분포

Abstract

This study intended to examine the characteristics of seasonal variation of water mass in the seas around Gori so as to provide the basic materials for scientific and systematic management of marine environment to the seas around the Sin Gori nuclear power plant in the future. For it, the seasonally horizontal and vertical distribution of water temperature and salt was examined by CTD material of the surrounding seas, observed from 2009 to 2011. Also, it conducted cluster analysis by water temperature of surface and bottom layer and interannual variability analysis by water mass. The conclusions of this study can be abstracted as followed. 1. The seasonally distinct distribution of water mass can be seen in the seas around Gori. 1) The water mass in spring showed small difference of spatial water temperature in the surface layer. And, in the bottom layer, warm water was existed on the nearshore and cold water was existed on the offshore. 2) For the structure of water temperature in summer, warm water was existed on the coast of surface layer and cold water was existed on the offshore. Also, warm water was existed in the seas of bottom layer and cold water was existed in the open sea. 3) In autumn, warm water was existed in the sea far from the surface layer and cold water was existed in the sea of bottom layer, but surface and bottom layer showed the nearly even water-temperature distribution on the nearshore. 4) The water temperature of winter showed the distribution different from other seasons. In other words, it showed even distribution without water-temperature difference between surface layer and bottom layer and between nearshore and offshore.

2. As the result conducting cluster analysis and interannual variability of water mass based on the materials of water temperature and writing the division chart of seas, objective seas were analyzed by total 3 cluster water mass; nearshore, inter-sea area and offshore. In I cluster divided as nearshore, effects of thermal effluent were relatively strong in comparison with other clusters. For the interannual variability of water temperature, effects of condenser effluent were made on the area of 4km point around the Gori nuclear power plant in seasons except for winter because the water temperature of nearshore is relatively high in all seasons except for winter. Therefore, the seasonal variation of water mass were distinct in the seas around Gori. And, as the result of cluster analysis, effects of condenser effluent in nuclear power plant are great in water mass of nearshore. This study should be provided as the basic material for managing marine environment of seas around Gori. For the scientific and systematic management of marine environment for the seas around Gori, it is necessary to analyze materials of marine environment by considering continuously effects of condenser effluent on the seas and stream of surrounding ocean current (Tsushima Warm Current and Eastern Sea Bottom Cold Water).