论文部分内容阅读
通过将2012年8月、12月在苏北黄海海域野外调查获得的声学多普勒流速剖面仪(ADCP)后向散射强度数据与悬沙浓度进行拟合,得知两者的相关系数在0.8以上,反演结果较理想。并结合同步观测的温度、盐度等水文要素资料,对该区域夏、冬季两季悬浮泥沙的垂直分布特征、形成原因及输运进行了研究,结果表明苏北近岸海域悬浮泥沙分布的典型性季节变化明显,冬季悬沙浓度普遍高于夏季。悬浮泥沙分布及输运受苏北沿岸水、黄海西部沿岸流、长江冲淡水、黄海暖流、黄海冷水团等影响,其中黄海西部沿岸流的季节变化为主要的影响因素。苏北沿岸水携带废黄河口的再悬浮泥沙和近岸悬沙向东南外海扩散,冬季的搬运量和扩散范围显著大于夏季。黄海暖流阻碍悬沙向外海扩散,使其在近岸被大量捕集下来。夏季长江冲淡水的东北方向偏转,使得苏北南部海域悬沙分布出现层化现象。
By fitting the backscatter intensity data and the suspended sediment concentration of the Acoustic Doppler Velocity Profiler (ADCP) obtained from field surveys in the Yellow Sea of North Jiangsu in August and December 2012, the correlation coefficient between the two is 0.8 Above, the inversion result is better. Based on the data of hydrological factors such as temperature and salinity observed synchronously, the vertical distribution, formation reason and transport of suspended sediment in summer and winter in this region were studied. The results showed that the distribution of suspended sediment The typical seasonal changes are obvious, suspended sediment concentrations in winter are generally higher than in summer. The distribution and transport of suspended sediment are affected by the water along the coast of North Jiangsu, the western coast of the Yellow Sea, the red water of the Yangtze River, the Yellow Sea warm stream and the Yellow Sea cold water mass. The seasonal variation of the western Yellow Sea coast flow is the main factor. Suspended sediment and nearshore suspended sediment from the littoral of Yellow River estuary in the northern Jiangsu coast diffused to the southeast and offshore. The handling volume and spreading range in winter were significantly larger than those in summer. The current of the Yellow Sea hinders the spread of suspended sediment to the sea and makes it trapped in a large amount in the near shore. In the northeast of the Yangtze River, freshwater red water is deflected in summer, causing stratification of suspended sediment in the southern North Jiangsu.