用活有孔虫分布指示三亚汊道外港潮流格局
On using living foraminifera distribution as indicator of general model of tidal current circulation in outer harbour of Sanya tidal inlet
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摘要: 由因子分析得知,海南岛三亚湾汊道外港海底分布有四个主因子活有孔虫群,它们分别代表海湾内水体、湖冲出半盐水水体、湾外内陆架水体及内陆架与海湾水相混的过渡水体.这些水体在潮汐作用下的运动、相互混合,可由各水体的有孔虫指示.由每个主因子因子得分最高的三个属种百分含量之和等值线图所指示的外港潮流循环格局,与海洋学研究所得的结果相当一致.利用有孔虫指示潮汐汊道潮流格局尚属首次尝试,这方法对海岸开发分析泥沙运动、污染物排放等有实践意义.Abstract: Based on Q-mode factor analysis, living foraminifera found in samples collected throughout outer harbour of Sanya tidal inlet of Hainan island can be divided into 4 principal factor foraminifera assemblages that should represent outer harbour water mass, brackish water mass flushing from lagoon, inner shelf water mass outside harbour, and muting water mass of outer harbour and inner shelf water masses separately. The moving and intermixing of these water masses under the control of the tide can be indicated by foraminifera in them. Contour maps of the sum of the percentage contents of the taxa associated with the three highest factor scores of each foraminifera assemblage show a good fit to tidal current circulation made in outer harbour derived from oceanographic studies. The method using living foraminifera distribution as indicators of tidal current circulation model in tidal inlet, which is applied for the first time, has a high potential for analysing sediment transport, poVution discharge and so on in developing the coast meources.
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