珠江口伶仃洋泥沙运动的沉积动力作用

Silt movement of Lingdingyang Bay in Zhujiang Estuary and analysis of sedimentary dynamics

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。

Lingdingyang Bay in the Zhujiang Estuary,an estuarine bay including several mouths has complicated sedimentary sources deriving from land and ocean.The silt moves continuously and constructs 'Three shoals and Two Thoughs ' under the effect of runoff, tidal flow, mixing of saline and fresh waters and wind wave. But due to the strenthening of tidal flow and mixing of saline and fresh waters, the silt moves gradually southward or east southward .