Nonlinear advection, Coriolis force, and frictional influence in the South Channel of the Yangtze Estuary, China

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• 作者：ZhongYong Yang (1) (2)
  HeQin Cheng (1)
  JiuFa Li (1)
  
  1. State Key Laboratory of Estuary and Coastal Research ; East China Normal University ; Shanghai ; 200062 ; China
  2. College of Hydraulic and Environment Engineering ; China Three Gorges University ; Yichang ; 443002 ; China
  
• 关键词：lateral flow ; nonlinear advection ; Coriolis force ; friction
• 刊名：Science China Earth Sciences
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：58
• 期：3
• 页码：429-435
• 全文大小：1,386 KB
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• 刊物主题：Earth Sciences, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：1869-1897

文摘

Observation data of along-estuary and lateral current velocities over a transect located at the South Channel of the Yangtze estuary was obtained during a spring tide in August 2011. Harmonic analysis was done on the current velocities to get a mean component and a semi-diurnal component. Based on these two components, the driving mechanisms of mean lateral flow and M 2 lateral tidal flow are shown and analyzed respectively. The dominant driving force of mean lateral flow is nonlinear advection and that of lateral M 2 tidal flow is Coriolis force. The friction plays an important role near the bottom and surface for both lateral mean flow and M 2 tidal flow.