Numerical Investigation of an Estuarine Front and Its Associated Eddy

摘要: An estuarine frontal system was investigated with a series of numerical experiments using 3D hydrodynamic model. The model results were confirmed field observations and compared theoretical analysis. Various factors, singly or jointly, contributing to the frontogenesis investigated. computations demonstrate that critical densimetric Froude number is exceeded as flood current increases front pushed forward deeper water. indicate two factors contribute significantly flow convergence by advancing phase on shoals relative in channel. They are differential friction resulting from depth contrast between deep channel shoals, enhanced surface ebb stratification density induced circulation. Numerical also show stronger lasts longer during neap tide than spring tide. Weaker salinity reduces buoyancy force required for diving denser water mass. Furthermore, causes exceed its value earlier, predicted analysis, pushes away region steep bottom slope, causing it dissipate.