The Relation of Cross-sectional Residual Current and Stratification during Spring and Neap Tidal Cycle at Seokmo Channel, Han River Estuary Located at South Korea

Choi, Nak-Yong; Yoon, Byung–Il; Kim, Jong-Wook; Song, J. I.; Lim, Eun-Pyo; Woo, S.

doi:10.9765/kscoe.2012.24.3.149

Cited by 7 publications

(2 citation statements)

References 12 publications

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“…The peak of landward F E is related to the salinity stratification and the vertical current shear. The strong vertical gradient of u E and S E give the salinity stratification and two-layer flow structure [5,41]. The peak of F E can be more pronounced in the strongly stratified estuary, where freshwater discharge is stronger than the tidal forces.…”

Section: Variation In U E and S Ementioning

confidence: 99%

Mechanisms of Advective and Tidal Oscillatory Salt Transport in the Hypertidal Estuary: Yeomha Channel in Gyeonggi Bay

Lee

Kim

Woo

2023

JMSE

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Many estuaries have been damaged by such material movements as marine debris, suspended sediment, and pollutants. Understanding the estuarine circulation system is necessary to solve such problems. Salt transport analysis provides an insight into hydrodynamic processes about material circulation in the estuary. In this study, to understand the mechanisms of salt transport, a three-dimensional hydrodynamic model was applied in the hypertidal estuary system—Yeomha Channel in Gyeonggi Bay. The simulation period of the model was a total of 245 days (20 January to 20 September 2020), including the dry and wet seasons. The model results for the temporal variation in tide, current velocity, and salinity were validated by comparing them with the observed in-situ data. The total salt transport (FS) was calculated in three cross sections of the Yeomha Channel and was decomposed into three components (QfS0: advective salt transport; FE: steady shear dispersion; FT: tidal oscillatory salt transport). During the dry season with strong tidal forces, the total salt transport patterns were mainly dominated by QfS0. During the wet season with high river discharge, the total salt transport patterns were determined by the balance between QfS0, FE, and FT. The long-term tidal constituents (MSf and Mm) were the main mechanisms causing QfS0 with the spring–neap variation during the dry season. The tidal trapping effect, caused by a phase difference of less than 90° between tidal current and salinity, generated landward FT in the dry and wet seasons. In addition, the high river discharge during the wet season decreased the phase difference between tidal current and salinity to less than 70 °, resulting in a much stronger landward FT. This study suggests that the long-term tidal constituents and tidal trapping effect are unique characteristics that contribute to material circulation in the hypertidal estuary.

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Section: Variation In U E and S Ementioning

confidence: 99%

Mechanisms of Advective and Tidal Oscillatory Salt Transport in the Hypertidal Estuary: Yeomha Channel in Gyeonggi Bay

Lee

Kim

Woo

2023

JMSE

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“…(Preisendorfer and Mobley, 1988). (Lee et al, 2012;Choi et al, 2012;Kim et al, 2013) 을 이용하여 수행하였으며 (Lwiza et al, 1991), 13시간동안 -Levinson, 1999).…”

mentioning

confidence: 99%

Spatial and Temporal Variability of Residual Current and Salinity Distribution according to Freshwater Discharge during Monsoon in Nakdong River Estuary

Song

Yoon

Kim

et al. 2014

Journal of Korean Society of Coastal and Ocean Engineers

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After building the dyke in Nakdong River Estuary, mixing of freshwater inflow to ocean and seawater to upstream is controlled by operating the sluice gates. Mixing and convergence of seawater and freshwater by opening the sluice gates, have a major impact on the circulation of seawater in the Nakdong River Estuary. Field measurement was carried out to study the characteristics of the estuary flow and environment of each channel of the Nakdong River Estuary. Vertical salinity distribution and residual current is different from each channel by the river discharge and topographic changes.

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Study on Variability of Residual Current and Salinity Structure According to River Discharge at the Yeoungsan River Estuary, South Korea

Song

Woo

2015

Procedia Engineering

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The Relation of Cross-sectional Residual Current and Stratification during Spring and Neap Tidal Cycle at Seokmo Channel, Han River Estuary Located at South Korea

Cited by 7 publications

References 12 publications

Mechanisms of Advective and Tidal Oscillatory Salt Transport in the Hypertidal Estuary: Yeomha Channel in Gyeonggi Bay

Mechanisms of Advective and Tidal Oscillatory Salt Transport in the Hypertidal Estuary: Yeomha Channel in Gyeonggi Bay

Spatial and Temporal Variability of Residual Current and Salinity Distribution according to Freshwater Discharge during Monsoon in Nakdong River Estuary

Study on Variability of Residual Current and Salinity Structure According to River Discharge at the Yeoungsan River Estuary, South Korea

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