Research On Baimao Sand Shoal Waterway Deep-Water Channel Regulation Idea In The Lower Reach Of The Yangtze River
HYDRAULIC ENGINEERING III(2015)
Abstract
Baimao Sand Shoal waterway is the key navigation-obstructing waterway first encountered in the project of 12.5 m deep-water channel of the Yangtze estuary extending upward to Nanjing. This article utilizes the hydrographic and sediment topography data of Baimao Sand Shoal reach for years to study the riverbed evolution characteristics, navigation-obstructing features and development trend of Baimao Sand Shoal reach. The research shows that, in recent years, Baimao Sand Shoal has retreated because of the impact on the head, with the addition of washout in the lower sand body of Baimao Sand Shoal, the inlet riverbed of south waterway is developing toward wide and shallow riverbed unfavorably, and the hydrodynamic force has dispersed and weakened with sediment siltation, forming a navigation-obstructing shoal at the transition section of branch. Based on the above riverbed evolution characteristics, the research presents the regulation idea of fixing shoal and stablizing channel.
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