Opportunity, challenge and measure of Yangtze estuary waterway in the period of post 12.5-meter navigation channel

Due to Yangtze Estuary Deepwater Channel Regulation Project with 40 years of research and 13 years of construction,the 12.5-meter-deep waterway was officially navigational in May 2011,and thus the pattern of Yangtze estuary waterway system had a historic change and stepped into the period of post 12.5-meter navigation channel.Based on analysis of current situation and problems of Yangtze estuary waterway,various kinds of opportunities and challenges of Yangtze estuary waterway in the period of post 12.5-meter navigation channel are discussed,and relevant channel regulation measures are preliminarily presented.