苏北辐射沙洲是长江口以北、废黄河口以南的南黄海西部的辐射状海底沙脊群,南北长约200公里,东西宽近100公里。海区水深在30米以内,有一系列作辐射状排列的大型沙脊和潮流深槽相间分布,辐射顶点大致在东台县弶港镇东南15公里的条子泥上。这些沙脊中有部分面积高于零米(理论深度基准面,下同),低潮时可出露有大小沙洲70余个,其中面积超过1平方公里的有50个。沙 The radiation sandbar in northern Jiangsu is a radial seafloor sand ridge north of the Changjiang River estuary and west of the southern Yellow Sea south of the waste Yellow River estuary. It stretches about 200 km north to south and nearly 100 km wide from east to west. The water depth of the sea is less than 30 meters. There are a series of large-sized sand ridges arranged radially and the troughs are arranged alternately. The apex of the radiation is roughly on the slime of mud which is 15 kilometers southeast of Donggang County. Some of these sand ridges are above zero in area (theoretical depth datum, the same below). At low tide, they can have more than 70 sandbars large and small, of which 50 are over 1 square kilometer. sand