S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Civil & Environmental Engineering (건설환경공학부) Theses (Master's Degree_건설환경공학부)
Lateral mixing effects on the vertical stratification and suspended sediment transport
횡방향 혼합에 의한 수직 성층 구조 변화 및 부유사 이송에 관한 연구
- 황 진 환
- 공과대학 건설환경공학부
- Issue Date
- 서울대학교 대학원
- Dynamics of Estuaries
- 학위논문 (석사)-- 서울대학교 대학원 : 건설환경공학부, 2016. 2. 황진환.
- As Simpson et al. (1990) emphasized the importance of the straining process in the stratification and mixing in the estuarine circulation process, various researches have investigated on the relative contribution of each process to the overall potential energy anomaly dynamics. However, many numerical works have modeled only in two-dimensions along-channel or the short distance in three-dimensions as Burchard et al. (2008) did. But, as Geyer and MacCready (2010) pointed out, the lateral process must be important in stratification and mixing in an estuary and three-dimensional modeling must be required in the whole along-channel.
This study performed a series of three-dimensional modeling and compared two-dimensional models to compared which significant processes we missed in the two dimensional model. The results from the simulations are numerated in terms of the potential energy anomaly (PEA). Each quantified process of the PEA dynamic equation presents the relationships between the Ф-advection, the depth mean straining, vertical mixing and vertical advection. Such terms are investigated to explain how water level, salinity distribution and across velocity in two-dimensional model are slightly different from three-dimension. Additionally, this work introduced a suspended transport model, which was developed to examine the influences of mixing and stratifying processes in one of the marine processes.
Keywords: Lateral flow, PEA, stratification, mixing, suspended sediment