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采用传统法分析了长兴岛及邻近海域11个表层沉积物样品的粒度参数。基于沉积物粒度参数的分析,反演了区域的水动力环境,结果表明表层沉积物平均粒径和分选系数的变化方向指示的长时间尺度下的沉积物输运格局较为一致,砾石、极粗砂和粗砂含量5%的等值线以及极细砂和粉砂含量20%的等值线分布较好的推测了长兴岛区域近底床优势流速。
The grain size parameters of 11 surface sediment samples in Changxing Island and adjacent waters were analyzed by the traditional method. Based on the analysis of sediment grain size parameters, the hydrodynamic environment of the area is inversed. The results show that the transport pattern of sediment under the long-term scale is consistent with the direction of change of sediment average grain size and sorting coefficient. The isoline of coarse sand and grit content of 5% and the contour distribution of fine sand and silt content of 20% are good predictors of near-bed dominant velocity in Changxing Island.