SPATIAL AND TEMPORAL VARIABILITY OF LONGSHORE TRANSPORT ALONG GOLD COAST, AUSTRALIA

Proceedings of the International Conference on Coastal Engineering

Aliasghar Golshani²  Rodger Tomlinson²  Kristen D Splinter²  Greg Stuart¹ 

[1] DHI Group;Griffith Centre for Coastal Management

关键词: : sediment transport;    longshore transport;    shoreline change;    climate variability;    Gold Coast;    Australia;   

DOI  :  10.9753/icce.v32.sediment.95

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

Spatial and temporal variability of longshore transport potential for a 35-km stretch of sandy coastline on the east coast of Australia is examined using a 25-year data set. Six-hourly offshore wave data is binned into yearly wave classes using a global k-means algorithm that accounts for wave height, period, and direction simultaneously.Wave class estimates are shoaled into the nearshore using MIKE 21 Spectral Wave (SW) model. Longshore transport is calculated using the formulas of Kamphuis (1991; 2002) and Bayram et al. (2007) and show good agreement with previously published estimates for the Gold Coast, suggesting the wave classification scheme sufficiently represents the variability in yearly wave data.Results show large temporal and spatial variability of transport potential along the coastline. Spatial variation is attributed to shoreline orientation and wave exposure, while temporal variability is significantly correlated with variations in the Southern Oscillation Index.

【 授权许可】

Unknown