过江通道建设对相对落后地区发展的影响——以江苏省南通市为例

苏通大桥及沪崇苏通道的建设将引致区域交通格局的演化，从而对相关地区经济社会发展产生深远影响。对于相对落后的南通市而言，快速过江通道建设既是促进发展的良好机遇，同时也将带来新的挑战和威胁：（1）交通可达性改善明显，南向联系趋于便捷，运输成本相应减小，要素集聚呈现加速态势，但优质要素面临流失威胁；（2）产业规模迅速扩张，但以低层次产业为主，进一步加大了产业层次提升的压力，同时建设用地的盲目扩张和散乱布局，使得空间开发无序风险加剧；（3）进入上海都市圈的紧密圈层，有望成为长江三角洲北翼重要的次中心城市，但面临的竞争压力也不断增大。为促进南通市的可持续发展，政府部门应在推进都市区建设、促进要素集聚、空间资源的合理和统筹利用等方面制定科学有效的区域政策。

IMPACT OF THE CROSS YANGTZE PASSAGE CONSTRUCTION ON THE DEVELOPMENT OF THE RELATIVE BACKWARD AREAS-THE CASE OF NANTONG, JIANGSU PROVINCE

The construction of Suzhou Nantong Cross Yangtze Bridge and Shanghai Chongming Nantong Cross Yangtze Passage will lead to the evolution of the regional transport network pattern,which will deeply impact on the development of correlative region.As for as Nantong,the relative backward area in this region,the construction of the cross Yangtze passage is not only an opportunity but also a challenge to its development:(1) The accessibility of Nantong will be markedly improved after the construction,which makes Nantong convenient to connect the core areas in the Yangtze Delta,and the decrease of transport costs will accelerate the production factors agglomeration,but at the same time,the high quality factors are confronted with the potential drain risk.(2) The industrial scale will expand rapidly,but the lower class industry are dominant in this process,which increase the stress of industrial structure improvement,and the blind outspread and dispersed layout of construction land deteriorate the out of order pattern of spatial exploitation.(3) With entering the compact circle of Shanghai Metropolitan Coordinating Area,Nantong is hopeful to establish the second tier cities in the north of the Yangtze Delta,but the competition stress will synchronously increases.For the sustainable development,some regionally efficient policies should be constituted on promoting city construction,agglomerating factors and the reasonably utilizing of spatial resources.