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107/09/25 14:00 中山大學海洋科學系劉祖乾特聘教授 演講
演講公告
張貼人：網站管理員 ╱ 公告日期：2018-09-19演 講 公 告
主講人：劉祖乾 特聘教授
地點：中央大學科學一館S-325教室
摘要：
講題：A comprehensive sediment dynamics study of a major mud belt system on the inner shelf along an energetic coast
主講人：劉祖乾 特聘教授
中山大學海洋科學系
時間：9月25日（星期二）下午2點
地點：中央大學科學一館S-325教室
摘要：
Globally mud areas on continental shelves are conduits for the dispersal of fluvial-sourced sediment. We address fundamental issues in sediment dynamics focusing on how mud is retained on the seabed on shallow inner shelves and what are the sources of mud. Through a process-based comprehensive study that integrates dynamics, provenance, and sedimentology, here we show that the key mechanism to keep mud on the seabed is the water-column stratification that forms a dynamic barrier in the vertical that restricts the upward mixing of suspended sediment. We studied the 1000 km-long mud belt that extends from the mouth of the Changjiang (Yangtze) River along the coast of Zhejiang and Fujian Provinces of China and ends on the west coast of Taiwan. This mud belt system is dynamically attached to the fluvial sources, of which the Changjiang River is the primary source. Winter is the constructive phase when active deposition takes place of fine-grained sediment carried mainly by the Changjiang plume driven by Zhe-Min Coastal Currents southwestward along the coast.
最後修改時間：2018-09-11 PM 3:44
