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Download or read book 3D Numerical Modeling of Hydrodynamics and Sediment Transport in Estuaries written by Xiaohai Liu and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Concentration in the corresponding z-level of the water column. Secondly, the horizontal concentration difference was determined. Finally, the horizontal pressure gradient in the water column was directly calculated from the horizontal concentration gradient. A stepwise bottom boundary condition was adopted for steep slopping bottom boundary. The algorithm has been used to enhance the EFDC model. The model code has been tested in three test cases: 1) flat bottom basin, 2) steep sloping channel, and a coastal shelf. Results indicate that conventional approach in current EFDC dealing with horizontal pressure gradient terms causes spurious surface elevation and velocity field. In comparison, the employment of the algorithm presented in this study this study significantly reduced numerical errors in predicting surface elevation and currents in navigation channels and coastal shelves.