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海洋通报  2010 

长江口北支的沉积物输运趋势

DOI: 10.11840/j.issn.1001-6392.2010.3.045

Keywords: 粒度参数,重矿物,粒径趋势分析,北支

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Abstract:

2007年9月在长江口北支采集表层沉积物样品,进行粒度和重矿分析,并利用Gao-Collins粒径趋势分析模型计算沉积物净输运趋势.结果显示,北支上口的沉积物有向下游输运的趋势;大新港至河口处,沉积物大致呈由北支下段向中、上段输运的趋势;北支河口外的沉积物,存在着向河口内输运的趋势.重矿物中稳定矿物与不稳定矿物比值的变化也显示,北支上口、下口处沉积物均向北支内输运,与粒径趋势分析的结果基本吻合.上述结果均显示,沉积物向北支内净输运,导致北支河段逐渐淤积.

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