Modelling Coastal Processes on Sandy Beaches

Walker, D.; Rana, Masud

doi:10.1142/9789814350730_0013

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the coastal region where tropical cyclones hit frequently, storm-induced sediment deposition and erosion play a significant role in coastal and environmental engineering. Very often, storm events cause enormous economic loss and environmental hazards (Walker and Rana 1999). A strong storm may overtop barrier islands, removing sediments from the beach or near-shore environment and depositing overwash fans across back-barrier marshes, lakes, and lagoons (Goodbred et al 1998;Donnelly et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Modeling Storm-Induced Current Circulation and Sediment Transport in a Schematic Harbor

Zhou

2005

J. Waterway, Port, Coastal, Ocean Eng.

View full text Add to dashboard Cite

A two-dimensional dynamical model is established to simulate current circulation and sediment transport induced by storm surges in a schematic harbor. The model accounts for both settling and resuspension processes of cohesive fine sediments in a salty water environment. The numerical results demonstrate that the current follows wind albeit with a time lag, and so does sediment concentration. The time lag between current and wind is of the order of interval needed for wind to transfer momentum to the whole water body. Whereas, the retarded dynamic balance of sediment entrainment and settling fluxes is responsible for the time lag between sediment concentration and current. When a tropical cyclone, or conventionally so-called typhoon in the Pacific area, is passing through the harbor, the higher sediment concentration inside the harbor is found to the right of the path rather than to the left of it. Bed deformation is found to be substantially influenced by typhoon tracks relative to the harbor. For a harbor facing east, a northward typhoon results in erosion and the southward or westward one causes deposition. Both erosion and deposition occur along the coast with little bedform variations near the harbor center.

show abstract

Section: Introductionmentioning

confidence: 99%