长江南京以下12.5m深水航道一期工程乘潮水位利用分析

Utilization of tide-bound water level of 12.5 m deepwater channel phase I project of the Yangtze River downstream Nanjing

长江南京以下12.5 m深水航道一期工程所在河段为潮汐河段,5万吨级以上船舶需乘潮进出。根据工程河段的潮汐特性,分析南通天生港至长江口采用一乘进出港和二乘进出港的乘潮历时、不同保证率条件下的乘潮水位,进而分析航行于长江口深水航道的不同吨级的集装箱船、原油船、散货船的乘潮保证率,据此论证一期工程确定的通航标准的合理性。

The section of Yangtze River downstream Nanjing, where the 12.5 m deepwater channel phase I project is located, is a tidal reach, and ships with a tonnage over 50 000 need to pass in and out by tide. Based on the tidal characteristics of the engineering river reach, the duration by tidal current and the tide-bound water levels are analyzed under conditions of different guarantee rates of first and second tide saving time, from Tiansheng Harbor of Nantong to the Yangtze estuary. Furthermore, the guarantee rate for navigation of container ship, crude oil ship, bulk carriers of different tonnage, and the rationality of the navigation standard of phase I project are demonstrated.