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OBSERVATIONS RELATED TO THE USE OF THE SIGMA COORDINATE TRANSFORMATION FOR ESTUARIES AND COASTAL MODELING STUDIES
Citation:
Paul, J. OBSERVATIONS RELATED TO THE USE OF THE SIGMA COORDINATE TRANSFORMATION FOR ESTUARIES AND COASTAL MODELING STUDIES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-94/180 (NTIS PB95124756).
Description:
One of the common techniques used in application of time-dependent, three-dimensional models addressing estuarine and coastal environmental problems is the sigma coordinate transformation. his transformation has proven useful in applications with highly irregular bottom topography. owever, numerous modeling studies have noted difficulties including spurious density-induced motions and increased velocity fields at depth in variable topography domains. alculations are presented to illustrate that the common practice of neglecting terms proportional in the transformed equations can be responsible for spurious velocities.