Numerical Solutions of Coastal Morphodynamic Evolution for Complex Topography




Yun-Chih Chiang;Sung-Shan Hsiao;Ming-Chung Lin

Key Words

numerical modeling ; morphodynamic evolution ; sediment conservation law ; oscillation removal


Journal of Marine Science and Technology

Volume or Term/Year and Month of Publication

18卷3期(2010 / 06 / 01)

Page #

333 - 344

Content Language


English Abstract

Numerical modeling of coastal morphodynamic evolution is a powerful tool for the planning and design of coastal engineering. The coastal morphological modeling system is based on the sediment conservation law, which couples modules for waves, wave-driven currents, and sediment transport rates. The numerical scheme for the sediment conservation law and nonlinear coupling between these modules can lead to dispersions, diffusions, spurious oscillations and stability problems that are still not well developed. In this paper, the bed-slope updating techniques, oscillation removal schemes, and 2-step, 3-time-level temporal discretization are employed to avoid oscillations and improve the stability of the coastal morphological model with accuracy up to O (△t^2, △x^5, △y^5). Finally, the model shows good performance for coastal areas with complex topography.

Topic Category 基礎與應用科學 > 海洋科學
工程學 > 市政與環境工程