TY - GEN

T1 - Localized sigma coordinates for the vertical structure of hydrodynamic models

AU - Fortunato, Andre B.

AU - Baptista, Antonio M.

PY - 1994

Y1 - 1994

N2 - This paper analyzes the use of localized sigma coordinates in the numerical solution of the vertical structure of coastal flows. We show, through a combination of truncation error analysis and 2D (vertical) numerical experimentation, that localized sigma coordinates have two important advantages over the more traditional domain-wide sigma coordinates: the evaluation of horizontal gradients of density in the presence of steep bottom slopes is more accurate, and the vertical discretization can be freely placed where it is needed. These two advantages appear to far out weight, for practical situations, the restrictions imposed by the fact that the localized sigma coordinates are only conditionally consistent.

AB - This paper analyzes the use of localized sigma coordinates in the numerical solution of the vertical structure of coastal flows. We show, through a combination of truncation error analysis and 2D (vertical) numerical experimentation, that localized sigma coordinates have two important advantages over the more traditional domain-wide sigma coordinates: the evaluation of horizontal gradients of density in the presence of steep bottom slopes is more accurate, and the vertical discretization can be freely placed where it is needed. These two advantages appear to far out weight, for practical situations, the restrictions imposed by the fact that the localized sigma coordinates are only conditionally consistent.

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M3 - Conference contribution

AN - SCOPUS:0027961923

SN - 0872629759

T3 - Proc 3 Int Conf Estuarine Coastal Model 3

SP - 323

EP - 335

BT - Proc 3 Int Conf Estuarine Coastal Model 3

A2 - Spaulding, Malcolm L.

A2 - Bedford, Keith

A2 - Blumberg, Alan

A2 - Cheng, Ralph

A2 - Swanson, Craig

PB - Publ by ASCE

T2 - Proceedings of the 3rd International Conference on Estuarine and Coastal Modeling III

Y2 - 8 September 1993 through 10 September 1993

ER -