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1 June 2008 Numerical Simulations of Scalar Transport with Fully Derived Diffusion Terms in Sigma-Coordinate
Seung Oh Lee, Su Jin Kim, Kyu-Nam Hwang, Yong-Sik Cho
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Abstract

A two-dimensional numerical model employing a fully transformed σ-coordinate system in the vertical direction is developed to analyze the scalar transport in an estuary. For a preliminary step of developing the numerical model, the influence of a coordinate transformation on the accuracy of the numerical simulation is investigated by comparing the computational results in both z- and σ-coordinates with analytical solutions. In addition, the numerical errors due to the transformation are investigated according as whether the diffusion term is fully derived or not. The numerical accuracy attributable to the full transformation is examined by comparing predicted results with those of the model employing only the partial transformation in a simply sloped topography. Finally, the numerical model developed in this study is applied to the Keum River estuary in Korea, for a salinity intrusion simulation. The calculated results showed good agreement with the observed field data, both of which clearly indicate that the tidal effect on the salinity intrusion are clearly discerned in the estuary.

Seung Oh Lee, Su Jin Kim, Kyu-Nam Hwang, and Yong-Sik Cho "Numerical Simulations of Scalar Transport with Fully Derived Diffusion Terms in Sigma-Coordinate," Journal of Coastal Research 2008(10052), 141-148, (1 June 2008). https://doi.org/10.2112/1551-5036-52.sp1.141
Published: 1 June 2008
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KEYWORDS
estuary
Saltwater intrusion
scalar transport
Two-dimensional numerical model
σ-coordinate system
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