Numerical simulation of hydrodynamic and water quality effects of shoreline changes in Bohai Bay

Jia, Han; Shen, Yongming; Su, Meirong; Yu, Chunxue

doi:10.1007/s11707-018-0688-x

Cited by 27 publications

(15 citation statements)

References 13 publications

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“…Consequently, the semi-diurnal tidal component, M 2 , is predominant in the Bohai Sea. These results generally agree with the findings of Bao et al [49] and Jia et al [11]. Comparison between the model predicted and field observed tidal harmonic constants (tidal amplitude and phase) in 12 stations around the Bohai Sea is shown in Figure 3.…”

Section: Characteristics Of Tidessupporting

confidence: 91%

“…The Bohai Sea is a semi-enclosed shallow sea off the coast of northern China. The several decade long economic boom in this region has coincided with a decline in water quality [11][12][13]. Due to its semi-enclosed nature, water exchange with the Yellow Sea and the larger Pacific Ocean is weak leading to a buildup of land-based pollution [11].…”

Section: Introductionmentioning

confidence: 99%

“…The several decade long economic boom in this region has coincided with a decline in water quality [11][12][13]. Due to its semi-enclosed nature, water exchange with the Yellow Sea and the larger Pacific Ocean is weak leading to a buildup of land-based pollution [11]. Although the reduction of the pollution load is one of the important measurements of the water quality improvement, knowing the water exchange rate, which is an intrinsic condition determining the physical self-purification ability and water quality, is necessary to protect the Bohai Sea from water quality degradation.…”

Section: Introductionmentioning

confidence: 99%

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Combined Effect of Tides and Wind on Water Exchange in a Semi-Enclosed Shallow Sea

Shang

Sun

Tao

et al. 2019

Water

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The Bohai Sea is a semi-enclosed shallow sea in China, where the tides and wind are the dominant factors contributing to the water exchange with the Yellow Sea. However, existing studies on this water exchange primarily consider only the effect of tidal action, neglecting the contribution of wind. In this study, numerical models were used to simulate the hydrodynamic processes and tracer transport, with the consideration of both tides and wind. Based on the models, the two time scales, age and half-life, are applied to study the water exchange in the Bohai Sea quantitatively. The results show that the age and half-life decrease significantly when wind is included in the simulation, revealing that wind is an important contributor to the water exchange in such a semi-enclosed shallow sea. Under the combined forcing of tides and wind, the water transport in the Bohai Sea becomes clockwise, in contrast with the counterclockwise transport driven by the tides only. The seasonal-varying wind leads to a fluctuation of water exchange in an annual cycle, with the stronger water exchange in the northern (Liaodong Bay) and the western (Bohai Bay) regions of the Bohai Sea in winter and in the southern part (Laizhou Bay) in summer.

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Section: Characteristics Of Tidessupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combined Effect of Tides and Wind on Water Exchange in a Semi-Enclosed Shallow Sea

Shang

Sun

Tao

et al. 2019

Water

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“…It is a three-dimensional ocean model which was originally developed by Chen et al (2003; http:// fvcom.smast.umassd.edu/fvcom/, last access: 4 March 2018) based on primitive equations and improved by researchers at the University of Massachusetts-Dartmouth (UMASSD) and Woods Hole Oceanographic Institution (WHOI) (Chen et al, 2006a). Previous applications include research on large lakes, coastal estuarine regions and regional ocean areas (Gronewold et al, 2019;Lin and Fissel, 2014;Lai et al, 2018). The modeling system uses the finite-volume method with the capability to deal with horizontal unstructured triangular cells, which is well fitted to irregular coastlines and small-scale simulations (such as estuarine wetlands) with high resolution.…”

Section: Model Descriptionmentioning

confidence: 99%

“…The hydrological properties of estuaries create a complex physical environment due to the combined effects of up- stream rivers and the adjacent ocean. Estuary circulations are primarily controlled by freshwater discharge, the tidal range and tidal currents (Sassi and Hoitink, 2013;Veerapaga et al, 2019) and are modified by winds, shorelines and topography (Alebregtse and de Swart, 2016;Lai et al, 2018), which further influence the processes of salinity transport and salt wedges in estuary waters (Haralambidou et al, 2010;Gong and Shen, 2011;Liu et al, 2019). Salinity changes in estuaries have been the focal point of much work over the past few decades in order to understand saltwater intru-sion mechanisms, with the majority of the research based on on-site observations and numerical models.…”

Section: Introductionmentioning

confidence: 99%

The impacts of runoff decrease and shoreline change on the salinity distribution in the wetlands of Liao River estuary, China

Zhang

Jiang

2021

Ocean Sci.

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Abstract. The wetland of Liao River estuary (LRE) in northeastern China is one of the best-preserved wetlands across the globe. However, it is extremely vulnerable to hydrological changes as well as other disturbances, particularly upstream river discharges and the reclamation from anthropogenic activities. In this study, a 3D hydrodynamic model was used to reproduce the flow patterns of the LRE and to explore the variation in salinity under different scenarios. Furthermore, the impact of river discharge and shoreline changes on the salinity distribution in the LRE was quantitatively analyzed and discussed through several simulation experiments. The model reasonably reconstructed the spatiotemporal variability and distribution of salinity in the Liao River estuary and the wetlands across intertidal areas. Increases in runoff were demonstrated to significantly decrease the mean salinity values of the estuary, with changes in salinity negatively correlated to the longitudinal distance from the estuary mouth. Moreover, the shoreline change caused by the construction of Panjin Port was observed to have an obvious influence on the salinity distribution of the LRE, particularly in the lower reaches of the Pink Beach wetland. Comparisons of the Liao River estuary residual flow fields under different shorelines revealed that the establishment of the port resulted in the diffusion of the runoff from the Daliao River due to the obstruction of the port body, which enhanced the tidal mixing effect and consequently weakened the dilution effect of freshwater entering the Pink Beach wetland. Overall, the current study should be helpful for offering a greater understanding of Suaeda heteroptera vegetation degradation in the LRE, China, and also provides a new perspective in investigating the degradation mechanism in other estuarine wetlands.

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Coastline changes and tidal current responses due to the large-scale reclamations in the Bohai Bay

Huang,

Xu,

Bai

et al. 2023

J. Ocean. Limnol.

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Numerical simulation of hydrodynamic and water quality effects of shoreline changes in Bohai Bay

Cited by 27 publications

References 13 publications

Combined Effect of Tides and Wind on Water Exchange in a Semi-Enclosed Shallow Sea

Combined Effect of Tides and Wind on Water Exchange in a Semi-Enclosed Shallow Sea

The impacts of runoff decrease and shoreline change on the salinity distribution in the wetlands of Liao River estuary, China

Coastline changes and tidal current responses due to the large-scale reclamations in the Bohai Bay

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