Sediment transport in the nearshore area of Phoenix Island |
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| Authors: | Rijun Hu Fang Ma Jianzheng Wu Wei Zhang Shenghui Jiang Yongchen Xu Longhai Zhu Nan Wang Aijiang Liu |
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| Institution: | 1.College of Marine Geoscience,Ocean University of China,Qingdao,P. R. China;2.Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education,Ocean University of China,Qingdao,P. R. China;3.North China Sea Branch of the State Oceanic Administration,Qingdao,P. R. China;4.Qingdao Institute of Marine Geology,Qingdao,P. R. China |
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| Abstract: | Based on the measured data, suspended sediment concentration, surface sediment grain size, current and waves, the sediment transport mechanisms and pathways in the Phoenix Island area were analyzed using methods of flux decomposition and Grain Size Trend Analysis (GSTA). The results show that net suspended sediment is mainly transported by average current, Stokes drift, and gravitational circulation. The transport direction of suspended sediment is varying and basically following the direction of residual tidal currents. Surface sediment transport pathways are primarily parallel to the coastline along with two convergent centers. Waves and longshore currents have a significant influence on sediment transport, but the influence is limited due to a steep and deep underwater bank. Tidal current is the main controlling factor for sediment transport, especially in the deep water area. Neither suspended nor surface sediment is transported towards the southwest. The South Shandong Coastal Current (SSCC) has little effect on sediment transport processes in the nearshore area of Phoenix Island. |
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