Wave-Current Interaction and its Influence on Sediment Transport
Publish Year: 1385
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ICOPMAS07_001
تاریخ نمایه سازی: 14 فروردین 1385
Abstract:
The interactions between waves and currents were evaluated and their potential influence on sediment transport assessed. To consider wave-current interactions, wave and current fields were individually examine and then combined. Flow fields were explored using an available hydrodynamic model, the Environmental Fluid Dynamics Code (Hamrick, 1996; Jin et al. 2000). Three flow fields were considered: a strong current (a river), a moderate current (a bay or harbor), and a weak current (small lake with wind-driven circulation). Wave fields were explored using small amplitude (linear) wave theory. The combined effect of wave-current interactions was explored using the approach of Grant and Madsen (1979). These analyses indicate that, in the presence of currents, waves dramatically enhance sediment transport. Even when a current is weak, the combined effect of waves and currents can resuspend and transport sediments. For the conditions explored, bottom shear stresses from wave-current interaction were greater than the shear stresses from currents alone by an order of magnitude or more
Authors
Mahdi Adjam
PhD student of Hydraulic Structures Engineering, Tarbiat Modares University, Tehran, Iran
Mahdi Shafieefar
Assistant Professor, Civil Engineering Department, Tarbiat Modares University, Tehran, Iran
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