【摘要】 厦门港湾冬季近底层高平潮前后时段悬浮物的粒度分析结果显示,其中值粒径范围在2.6～4.4μm之间,平均为3.4μm;各站位之间粒度分布的曲线和参数变化不大,在研究区中分布较为均匀.频率分布曲线含二至三个次组分,各次组分的众数位值依次为5.67φ、7.52φ、10.40φ;概率值累积频率曲线主要由二至三个线段组成,其截点分别为6φ和8φ,且与相应的频率分布曲线上的低谷位并不相互对应.这些特征反映了采样时的弱动力条件和至高平潮时湾内水体趋于均匀混合的趋势,以及研究区中悬浮物来源上的非单一性.更多还原

【Abstract】 Grain size analysis was carried out for the suspended particle samples collected from the bed layer water in Xiamen harbour during a winter voyage of investigation. The results showed the grain size characteristics of the suspended matter as the following: 1) the median diameters of the suspended matter varied from 2- 6μm to 4. 4μm, with their mean value 3. 4μm among all the samples; 2) frequency curves showed that there were two or three sub-populations with their sub-modes being 5- 67,φ7. 52φ and 10. 4φ ,respectively . The probability plots showed two or three segments, the transetion points of which were 6φ and 8φ, were not matched with the lower "valley" points at the corresponding frequency curves, revealing that there existed some mixing between the sub-populations. These characteristics reflected the rather weak hydrolic conditions and the tendency of uniform mixing of the open sea water and the river runoff during the stage of tidal stand, and the multiple sources of the suspended matter.更多还原