中文摘要：

南京是我国长江尾闾著名的历史文化名城,自周元王四年（公元前472年）始筑＂越城＂至今已有2 482a的历史。在南京城市发展过程中,由于自然、政治、经济等因素的综合影响,历代在此建设城廓,都以江南向西北开口的簸箕形盆地作为基础,而向北跨江发展自历史上以来都非常缓慢。在实地踏勘研究区和梳理分析历史地理资料的基础上,重建了南京城市跨江发展的历史过程,划分出4个发展时期：沿江发展期、跨江发展的萌芽期、跨江发展的初期、跨江发展的全面和加速推进期。基于城市跨江发展的原因与机制等理论,分析论证了当前南京选择全面和加速推进跨江发展的可行性。依据国内外跨江发展的经验教训,提出南京实施全面和加速推进跨江发展的主要策略是：（1）加快构建合理的跨江交通格局;（2）处理好江北新市区与南京城市整体功能的互补性与独立性关系;（3）做到空间布局优化与开发重点突出并举,江北老城镇保护性改造与新市区开发建设并重;（4）充分利用大型产业项目的非树型效应;（5）实施沿江岸段的合理功能分区与生态环境综合整治;（6）省市政府提供持续的政策支持,完善体制机制改革。

英文摘要：

Nanjing is a well-known historic and cultural city at the lower reaches of the Yangtze River.Since the beginning of fortification in 472 B C,it has 2 482 years＇ history.In the process of Nanjing city＇s development,due to natural,political,economic and other comprehensive reasons,it always built the enceinte by use of a basin which is opening to the northwest at the south bank of the Yangtze River,but northward river-span development was very slow all the time during the historical period.On the basis of field investigations and historical materials＇ analysis,this paper reconstructed the historical process of Nanjing＇s river-span development and made out four development periods.They were the stage of riverfront development,the embryonic stage,the incipient stage,the overall and accelerating stage of river-span development.Based on the causes and mechanics of the city＇s river-span development,it analyzed and demonstrated the feasibility of overall and accelerating river-span development at present.According to experience learned from domestic and oversea cities＇ river-span development,it proposed main strategies for Nanjing＇s overall and accelerating river-span development：（1） to speed up building proper river-span traffic pattern;（2） to coordinate the interdependence and independence between new urban area at the north bank and Nanjing city＇s integrated functions;（3） to balance the distribution of spatial structure as well as highlight of the key points of development and push forward the construction of new urban area at the north bank as well as protective transformation of the old towns;（4） to utilize the non-tree-pattern effect of large-scale industrial projects sufficiently;（5） to implement proper functional zoning and comprehensive improvement of environment at the Yangtze River banks;（6） Provincial and municipal governments should provide long-lasting policy support and perfect institutional and structural reforms.