对塞纳河口湾及其毗邻陆架所进行的沉积动力学研究,使得有可能对两者之间的沉积物交换现象得出一些结论.陆架沉积物迁往塞纳河口湾,使那里沉积海洋混沙.它们是低海面时从陆地搬运到陆架的,随后,优势潮流和浪生流使之向海岸迁移.潮汐作用使河口湾出现一个最大浑浊带,起因于涨潮流引起的底质强烈再悬浮及其对搬运泥沙(来自河、海)的阻拦.在河流洪水期,混浊带往往向海扩展,使沉积物重新散布到陆架上.人类对河口湾地形的改造,强化了这种现象.然而,主要由于目前的清淤作业引起的水流型式,又减缓了冲积物向海洋的扩散.因此,人类改变了河口湾的自然作用,把它从沉积洼地变成了向陆架供应冲积物的物源.本文提出了一个顾及物源多样性和沉积动力学复杂性的沉积物冲淤初步设想. Sediment dynamics studies of the Seine estuary and its adjacent shelf make it possible to draw some conclusions as to the exchange of sediments between the two shelves. Sediment sediments are moved to the Seine estuary where sediment is mixed with sediment. They were transported from the land to the shelf at low sea level, after which the dominant tidal currents and the flow of currents led them to move to the coast. The tidal effect caused a maximum turbidity zone in estuaries, resulting from strong resuspension Blocking sediment transport (from the river and the sea). During the river flood, turbid belts tend to expand to the sea and allow the sediments to re-disperse onto the shelf. This is reinforced by human remodeling of the estuary. However, Mainly due to the current water flow patterns caused by dredging operations and slowing the diffusion of alluvial deposits into the sea, human beings have changed the natural role of estuaries and transformed it from sedimentary depressions to sources of alluvial supplies to the shelf. This paper presents a preliminary concept of sediment deposition that takes into account the diversity of sediment sources and the dynamics of sediment dynamics.