中文摘要：

长江口12.5 m深水航道已进入稳定运行、全面发挥效益的新阶段,长江口还存在北港、南槽等丰富航道资源,尚有进一步开发的潜力。结合长江口航道发展面临的新形势和新要求,明确指出未来一段时间长江口航道的开发重点是北港航道。通过总结长江口深水航道治理工程实践经验,探讨新形势下长江口航道治理的总体原则,并根据北港水道沿程河型特点、河势演变特征及碍航性质的不同,分别对北港上、中、下3个区段提出相应的治理思路及原则。

英文摘要：

The 12.5-meter-deep waterway of the Yangtze estuary has stepped into a new stage of stable operation and obvious benefit, but the navigational resources of the North Channel and South Passage in the Yangtze River estuary are abundant, which still have the potential of further development. Combining with the new situation and requirements of the Yangtze estuary waterway development, we point out that the future development keypoint of the Yangtze estuary waterway is the North Channel. By summing up practical experience of the Yangtze River Estuary Deepwater Channel Regulation Project, we probe into the general principles of the Yangtze estuary waterway regulation under the new situation. According to the differences of stream pattern feature, fluvial evolution characteristics and navigation-obstructing properties along the waterway of the North Channel, we propose relevant channel regulation ideas and principles of the upper, middle and lower reaches of the North Channel are respectively.