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长江河口最大浑浊带的悬沙输移特征
贺松林, 孙介民
华东师范大学河口海岸研究所 上海200062
摘要:
根据1988年洪、枯季在长江口南、北槽进行的最大浑浊带专项水文观测的资料，对悬沙输移的分项因子进行研究。结果表明，长江口最大浑浊带的悬沙输移过程存在明显的潮泵效应及强烈的悬沙、底沙双向交换;长江口南、北槽之间存在一个大尺度的平面环向是沙输移，同时南、北槽自身还有次一级尺度的槽内平面环向悬沙输移。本文还探讨了最大浑浊带与拦门浅滩相互影响、彼此制约的关系。
关键词:  长江河口  最大浑浊带  悬沙输移  潮泵效应
DOI：
分类号:
基金项目:国家自然科学重大基金!9487005
CHARACTERISTICS OF SUSPENDED SEDIMENT TRANSPORT IN THE TURBIDITY MAXIMUM OF THE CHANGJIANG RIVER ESTUARY
He Songlin, Sun Jiemin
Institute of Estuarine and Coastal Research, East China Normal University, Shanghai 200062
Abstract:
On the basis of data observed the turbidity maximum of the Changjiang River Estuary in rainy and dry seasons of 1988, the component items of suspended sediment transport are analyzed and studied. It comes to the conclusion that there exist significant tidal pumping effect and strong exchange between suspended load and bedload during the transport process of suspended matter in the turbidity maximum of the Changjiang River Estuary. A larger plane-looping net transport of suspended sediment between the South and the North Channels and secondary plane looping net transport in respective channel are described. The relation that turbidity maximum and rivermouth bar are mutually impacted and conditioned is briefly discussed.
Key words:  Changjiang River Estuary, Turbidity maximum, Suspended sediment transport, Tidal pumping effect
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