南渡江三角洲北岸的海岸演变及其机制分析
Evolution of the Nandu River Delta’s north coast andits mechanic analysis
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摘要: 南渡江三角洲位处琼州海峡南岸中部,自冰后期海侵以来,南渡江河口位置不断向海凸出,三角洲经历了由河流作用为主到波浪作用为主、从东部到西部演变的过程,目前三角洲东部废弃,西部向海口湾东部淤进[1].现今南渡江在新埠村南开始分汉,分流河道有干流、横沟河和海甸溪,分流河道间的沙洲分别为新埠岛和海甸岛(见图1).Abstract: Based on analysis of hydrodynamic conditions in the Nandu River Delta's north coast,this paper analysizes Nandu River Delta's river mouth process and its impact on adjacent coast's evolution,detailedly studies erosion or siltation of various coast segments,discusses the time-scales of coastal evolution and their relevant effecting factors and the trend of coastal evolution.
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Key words:
- Nandu River Delta’s north coast /
- coastal evolution /
- mechanic analysis
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中华人民共和国交通部.港口工程技术规范,第二篇,水文,第一册,海港水文.北京:人民交通出版社,1978 Andrew J,Cooper G.Ephemeral stream-mouth bars at flood-breach river mouths on a wave-dominated coast:comparisos with ebb-tidal deltas at barrier inlets.Marine Geology,1990,63:197-233 -
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