On the Characteristics of the Water Quality Changes due to the Development Phases of Pusan Port

J. Ocean Eng. Technol. 2000;14(3):11-19.

부산항의 개발단계별 수질환경변동특성에 관한 연구

고영찬,김종인,류청로

한국항만기술단,동아대학교 토목공학과,부경대학교 해양공학과

Keywords: Development of Pusan Port, Numerical experiments, Lagrangian particle tracking model, water quality changes, Water exchange rate

핵심용어: 부산항개발, 수치실험, 라그란쥐 입자추적모델, 수질변화, 해수교환율

Abstract

This study aims to examine the characteristics of the water quality variation in relation to the change of water exchange rate with respect to the development phases of the Pusan port. To clarify the characteristics, water exchange caused by the variations of coastline shape and water surface area was examined by the numerical experiments using the Lagrangian particle tracking model based on 2-D shallow water equation. As the results of numerical experiments, it was proved that the water exchange in the Pusan port was decreased mainly due to the port development and the breakwaters construction. During the port development phases from 1875 to 1998, 35% of the sea-space in the port had decreased to make hinterland spaces. This resulted in the loss of wet-land and coastline change as well as decrease of the water exchange rate at the sea side. The city population in that period had rapidly increased from several thousands to 4 millions, resulting in the large discharge of sewages into the port area. Under the these environmental conditions, it can be clearly said that the water quality in the Pusan port is sensitively affected by the discharge of urban sewages decrease of the water exchange rate in relation to port and urban developments. In the study, the temporal changes of water quality were discussed with respect to the port development phases. It was clear that the water quality wad controlled by the exchange rate change under the port development as well as the input impact into the port from the urbanized city area. To make clean sea of the Pusan port, it is suggested that the sewage control, the water exchange and coastline control should be systematically checked under the concept of eco-friendly development and environmental management.