| Coastline configuration and geomorphologic development mode of arc-shaped coast in South China |
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| 基金项目： | Natural Science Foundation of Guangdong Province，No.011181 |
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| 摘 要： | 1IntroductionArc-shaped bays are quite common on exposed sediment coast in South China, where the crenulate-bay beaches occur with the presence of two consecutive headlands and a predominant wave approach oblique to the alignment of the upcoast and downcoast headlands (Yasso, 1965). Oblique persistent swell striking a shoreline transports sediment alongshore and sculptures a coast into arc-shaped beaches. The shoreline of beach appearance mainly consists of straight segment and shadow segment…
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| 收稿时间： | 20 June 2004 |
| 修稿时间： | 31 August 2004 |
Coastline configuration and geomorphologic development mode of arc-shaped coast in South China |
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| Authors: | Dai Zhijun and Li Chunchu |
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| Institution: | (1) Institute of Estuarine and Coastal Research, Zhongshan University, 510275 Guangzhou, China;(2) State Key Lab of Estuarine & Coastal Sediment Dynamic and Morphodynamics, East China Normal University, 200062 Shanghai, China |
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| Abstract: | Coastline configuration indexes of 34 typical arc-shaped coasts in South China are investigated by the method of principal component analysis, and meanwhile deposition and geomorphologic features of arc-shaped coast are also analyzed. The results show: (1) The configuration of arc-shaped coast in South China is of the characteristic of variability and complexity. (2) The wave power and the openings of the bay are the decisive factors to result in the changes of the configuration of the arc-shaped coast in South China, however, incidence direction of the wave has no effect on configuration development of the coast. (3) Commonly, geomorphologic modes of the arc-shaped coast system in South China consist of barriers, lagoons and tidal-inlets, and can be divided into four types: the openings of the bay leaning to the east, the openings of the bay leaning to the south, the openings of the bay leaning to the west and the openings of the bay leaning to the north. |
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| Keywords: | coastline configuration geomorphologic mode arc-shaped coast South China principal component analysis |
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