南京大学学报（自然科学版）Issue(5)：666-678,13.DOI:10.13232/j.cnki.jnju.2014.05.015
新洋港河口悬沙特征与再悬浮过程
Characteristics of suspended sediment and resuspension processes in Xinyanggang Estuary
摘要
Abstract
Characteristics of sediment dynamics in many small and medium sized estuaries have great significance for geomorphologic evolution.Xinyanggang Estuary is a typical small and medium sized estuary with sluice gate which locates on the muddy coast of Jiangsu Plain.This article studies the characteristics of suspended sediment and its response to sediment resuspension through the data from field observation of three mooring ships in Xinyanggang Estuary.The result shows that the suspended sediment concentration(SSC)changes significantly during tides,SSC during ebb tides and the opening of tidal sluice is higher than other periods,and increases gradually from estuary to the tidal sluice,and the highest average SSC reaches to 1.45 g·L-1 .The vertical distribution of SSC during typical time of tides keeps with‘L type’,which the SSC between surface and bottom differentiates greatly.The water mixes well and vertical SSC changes evenly during the period of fresh water runoff.The average grain size of suspended sediment ranges from 5μm to 10μm,and the main component is silt with an average percentage higher than 70. There exists bottom sediment resuspension during tides and the highest resuspension flux ranges from 10-4 kg·m-2·s-1 to 10-3 kg·m-2·s-1 ,which decreases gradually from the estuary to the tidal sluice.The sediment grain size coarsens differently during the resuspension and the content of sand would increase in the component.Part of the suspended sediment of station S1 and S3 comes from bottom sediment resuspension while with that derives from ad-vection transport in station S2.关键词
中小型入海河口/悬沙特征/再悬浮过程/动力响应Key words
small and medium sized estuary/characteristics of suspended sediment/processes of resuspension/dynamic response引用本文复制引用
李明亮,杨旸,项明,朱国贤,陆体成,周俭华,高建华,汪亚平..新洋港河口悬沙特征与再悬浮过程[J].南京大学学报（自然科学版）,2014,(5):666-678,13.基金项目
海洋公益性行业科研专项(201105006),中央高校基本科研业务费重点项目培育计划“开敞型潮滩沉积动力过程与地貌演化模式”,国家自然科学基金(40906042) （201105006）
