摘要
根据2003年9月采集的长江口48个沉积物样品和在该区进行的海岸带调查所测取的沉积物资料分析表明,南槽沉积物渐趋细化。进一步利用Mclaren泥沙输运概率模型分析实测资料,结果发现南槽沉积物自北向南输运入海后,主要转向杭州湾北岸输移。此外,分析长江口不同潮时采集的沉积物粒度特征说明,不同潮时的动力作用下,大潮期间的沉积物粒度参数和物质组成与中、小潮期间相应的沉积物粒度参数及物质组成有所不同,因而对长江口不同时期的沉积物作比较分析时,选择同一潮时的沉积物可能更有意义。
Comparison was made of te grain-size parameters and composition of 48 sediment sample collected from this region during the coastal zone investigation were analyzed. The results show that the sediment of the South Channel in the Yangtze River tends to be fine. Application of the Mclaren model to calculate the sediment transport trend found that it was from north to south, then turned towards Hannzhou Gulf. Furthermore, the grain-size characteristics of the sediment samples during different tide periods were also analyzed. It was indicated that the grain-size parameters and compositions were different during different tide periods, representing a response to various dynamic actions. Thus, it is more meaningful to analyze the sediment characteristic at different times during the same tide period than during different tide periods.
出处
《海洋湖沼通报》
CSCD
北大核心
2005年第2期72-78,共7页
Transactions of Oceanology and Limnology
基金
河口海岸国家重点室开放基金资助(200404)
上海市博士后基金资助
关键词
南槽
沉积物
粒度参数
运移方向
South passage in the Yangtze river
sediment
grain-size parameter
transport trend
