珠江口伶仃洋是个多口门汇入的河口湾 ,其泥沙来源复杂多样 ,既有陆域来沙 ,又有海域来沙。这些泥沙进入伶仃洋以后 ,在径流作用、潮流作用、盐淡水混合作用及风浪等的影响下 ,不断地运移 ,形成“三滩两槽”的分布格局。 70年代中期以后 ,由于东部潮流作用及盐淡水混合作用的加强 ,受其压迫 ,西部泥沙物质不断向南、东南方向输运与沉积 The Pearl River estuary Lingdingyang is a multi-port portal into the estuary, the sediment source is complex and diverse, both land to sand, sea and sand. After entering the waters of the Dingdingyang, these sediments continue to migrate under the influence of runoff, tidal current, salt-water mixing and storm waves, forming a distribution pattern of “three beaches and two troughs.” After the mid-1970s, due to the intensification of the tidal flow and salt-water mixing in the eastern part of the country, the sediment in the western part of the country continued to move southwards and transported in the southeast