一、引言具有极细颗粒的海岸、河口,在大风浪作用下,水中的含沙量可达到相当大的数值。如果是后风浪显著减弱,则水中的含沙量逐渐降低,在底部形成高含沙量的底沙层,即所谓浮泥,它具有显著的流动性,在波浪作用下会产生输移,如大风浪后的平息时间较长,则底泥层会逐渐固结而失去流动性(根据天津新港的现场观察,此时泥沙的容重约为1.25吨/米~3)。 I. INTRODUCTION Coasts and estuaries with extremely fine particles can reach quite large values ​​under the action of storms. If after the wind and waves were significantly weakened, the sediment concentration in the water gradually decreased, the bottom of the sediment formation of high sediment concentration, the so-called floating mud, which has a significant mobility, the wave will produce a shift, such as After a long storms subside, the sediment layer will gradually solidify and lose its fluidity (according to the site observation in Tianjin Xingang, the sediment bulk density is about 1.25 tons / m3 at this time).