一、引言长江口12.5米的深水航道的开通,显著改善了长江口的通航条件,极大地释放了长江口航道的运输潜能,同时,也为深水航道继续向上延伸奠定了基础,为进一步发展长江干线江海运输创造了条件。为了充分 I. INTRODUCTION The opening of the 12.5-meter deep water channel at the mouth of the Yangtze River has significantly improved the navigation conditions of the Yangtze Estuary and greatly unlocked the transport potential of the Yangtze Estuary Channel. At the same time, it laid the foundation for the continued extension of the deep-water channel. In order to further develop the Yangtze River Route Jianghai transport created the conditions. To be full