낙동강 하구둑 하류부의 물리해양학적 환경과 낙동강 하구둑 유출수의 거동 = (A) Study on the Physical Ocenographic Environments and River Plume in the Nakdong Estuary Down the Nakdong River Barrier

다국어 초록 (Multilingual Abstract)

Estuaries are complex water systems, where salt and fresh water meet each other. The mixing of these water masses and factors such as tidal range, river discharge, wind, bottom topography, waves and Coriolis force have an important effect on the estuarine circulation.
After construction of Nakdong River Barrier, the outflow of Nakdong River and its influence on the circulation had changed Mixing processes in the Nakdong Estuary is studied here, several measurements such as tracking of the river plume using drogue, measurements of salinity along the section from Dadae-Dong to Gaduk Island and serial time series measurements of current were conducted.
Three cores of low salinity were found in this area. Nakdong River Plume is not continuous but patch-like because river water is discharged intermittently from the barrier according to the tidal cycle. This patch-like plume is advected to the Gaduk Is. by the flood current and this may be the cause of low salinity core near the Gaduk Is..
Interactions of tidal motion with topographic features are required numerical Two-Layer Model consists of the Coriolis effect, the interfacial friction, solution. the tidal current, the wind effect, bottom tophgraphy and entrainment processes.
The outflow discharged from the Nakdong estuary tends to deflect anticyclonically and to be deflected to the right.
The River Plume was stronger than the tidal current in the estuary.

목차 (Table of Contents)

• 목차 = ⅰ
• Ⅰ. 서론 = 1
• 1. 연구 목적 = 1
• 가. 낙동강의 특징 = 2
• 나. 하구둑의 건설로 인한 물리해양학적 환경 변화 = 2
• (1) 하구둑 건설 전 = 3
• (2) 하구둑 건설 후 = 4
• 2. 연구 방법 = 5
• 가. 자료 수집 방법 = 5
• 나. 염분 자료 분석 = 6
• 다. 유속 자료의 분석 = 9
• 라. 자료 분석 결과 = 12
• 3. 이층모델을 이용한 강수 플륨의 수치 분석 방법 = 12
• 가. 이론적 배경 = 13
• 나. 강수 플륨의 지배 방정식 = 15
• 다. 수치계산 = 22
• 라. 수치 결과 및 토의 = 24
• (1) 코리올리의 영향 = 24
• (2) 층간 마찰력의 영향 = 24
• (3) 바람의 영향 = 25
• (4) 조석의 영향 = 25
• Ⅱ. 결론 = 26
• 참고문헌 = 28
• SUMMARY = 64