Calculations of Tidal Currents in Bay Lagoon (Nha Trang Bay) Using Finite Element Method

Long, Bui Hong; Chung, Tran Van

doi:10.15625/1859-3097/14/4/5819

Cited by 2 publications

(3 citation statements)

References 24 publications

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“…The tidal current was supported by water exchange in Van Phong Bay of 34.7% per day [67] and Cam Ranh Bay of 16.64% per day [65]. The tidal current velocity reached 59.8 cm/s at ebb tide and 71.9 cm/s at flood tide in Van Phong Bay [68] and 81.6 cm/s at ebb tide and 57.9 cm/s at flood tide in Cam Ranh Bay [65], whereas current velocity in Xuan Dai Bay's velocity was in the range of 8.8-45.0 cm/s, with an average of 26.1 cm/s in March 2022 (Chung, 2022, personal data). The high tidal amplitudes and current support water exchanges as well as material balance (environmental parameters) in and out of the bays.…”

Section: Discussionmentioning

confidence: 99%

Environmental Concerns for Sustainable Mariculture in Coastal Waters of South-Central Vietnam

et al. 2022

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Mariculture provides an increasing seafood supply to a growing population. It also brings unintended consequences for the environment, resources, and sustainable development. In an attempt to evaluate the impacts of intensive mariculture of lobster in cages, the water quality and sediment quality in three South-Central regions of Vietnam, Xuan Dai Bay, Van Phong Bay, and Cam Ranh Bay, were monitored from April 2019 to May 2020. In each bay, two stations in the farming areas were compared to a non-farming reference station. The result showed no significant differences in the water quality parameters among the stations within each bay and between the bays. However, sediment quality noticeably differed between sites within each bay and between the bays. The accumulation of the observed parameters of sediment in farming areas was higher than in non-farming areas. In the Cam Ranh Bay, the concentration of organic carbon, total nitrogen, and total phosphorus in the sediment in farming areas was approximately 1.4 times higher compared to non-farming areas. Similar results were found in Van Phong Bay and Xuan Dai Bay with different magnitudes. Additionally, the difference in the sulfide concentration in the sediment of Van Phong Bay was notable for its better environmental quality than the other two. The findings indicated that mariculture wastes would accumulate in the sediment, and decompose over time, causing sediment degradation, which may affect the benthic biota in coastal waters.

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Section: Discussionmentioning

confidence: 99%

Environmental Concerns for Sustainable Mariculture in Coastal Waters of South-Central Vietnam

et al. 2022

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“…The governing equations in the curvilinear co-ordinates, are constructed based on the Reynolds equation in Cartesian coordinates [8]:…”

Section: The Governing Equations In the Curvilinear Coordinate Systemmentioning

confidence: 99%

“…In Viet Nam, [8] published a paper in 2007 which calculated tidal currents in the North Danger Reef by using finite element method (FEM) with shallow water equations, mainly continuity and momentum equations to partially solve the problems of bottom topography, boundary conditions, etc. using the finite difference method (FDM).…”

Section: Introductionmentioning

confidence: 99%

Mapping the residual tidal ellipse from Vung Tau–Bac Lieu, Viet Nam by using a numerical model in curvilinear coordinate

Kim¹,

Long²,

Hong³

et al. 2021

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Tidal currents are often the dominant source of current variability and play an important role in shaping coastal bottom topography. In this paper, the authors applied a hydraulic model in curvilinear coordinates to calculate 4 main tidal constituents, namely K1, O1, M2 and S2 in a region from Vung Tau-Bac Lieu, Viet Nam. The hydraulic model with the two-dimensional orthogonal curvilinear grid has the advantage of increasing the accuracy of the results at the domain boundary. The numerical method of this model derives from the solution of the Reynolds system of equations averaged over depths in the curvilinear coordinate systems. The model verification is implemented based on the equilibrium of the tidal currents of energy. The result of this model is used to map ellipse constituents and help understand more about the tidal deposition from Vung Tau to Bac Lieu, Viet Nam. The results recorded that the residual tidal ellipse M2 from Vung Tau-Bac Lieu, the greatest ellipses are M2, followed by the tidal constituents K1, O1 and S2. This rotation of the ellipse is almost the same with clockwise.

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Calculations of Tidal Currents in Bay Lagoon (Nha Trang Bay) Using Finite Element Method

Cited by 2 publications

References 24 publications

Environmental Concerns for Sustainable Mariculture in Coastal Waters of South-Central Vietnam

Environmental Concerns for Sustainable Mariculture in Coastal Waters of South-Central Vietnam

Mapping the residual tidal ellipse from Vung Tau–Bac Lieu, Viet Nam by using a numerical model in curvilinear coordinate

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