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苏北滨外海域存在大型辐射沙洲,其面积达20000km~2,区内洲槽相间,单个沙洲长达数十公里,甚至逾百公里,宽10～15km。由于辐射沙洲的分布格局形似指状河口坝,因此,有的研究者认为它是以河口坝作为初始形态发育而成的。但同时存在另一种意见,认为辐聚辐散的潮流产生了辐射沙洲体系。谅港辐射沙洲的形成过程至今仍是一个有争议的问题。按前一种意见,弶港地区应为长江的主要入海口,陆上必然存在可与长江这样的大河相匹配的古
There are large-scale radiation sandbars on the coast of North Jiangsu, with an area of 20000km ~ 2. There are 10km to 10km and 10km to 15km of single sandbar in the area. Due to the distribution pattern of the radiant sandbank resembles a finger-shaped dam, some researchers think that it is developed from the dam as an initial shape. However, at the same time, there is another suggestion that the trend of convergent divergence has created a radiation sandbar system. The formation of the radiation sand bar in Hong Kong is still a controversial issue to this day. According to the former opinion, the port area should be the main port of entry into the Yangtze River. There must exist on the land an ancient parallels with a large river such as the Yangtze River