Entrainment and Distribution of Different Sand Sizes Under Water Waves
Entrainment and Distribution of Different Sand Sizes Under Water Waves
复制标题
水浪作用下不同粒径砂粒的夹带及分布
DOI：
--
复制
发表时间：
1983
期刊：
影响因子：
--
通讯作者：
P. Nielsen
中科院分区：
文献类型：
--
作者：
P. Nielsen
在波浪波纹上不同高度收集的床沙和悬浮沙的分析表明，对于粒径大于0.5 mm的颗粒，夹带成悬浮液的可能性随着粒径的增加而减小，而对于较细的材料（直径小于0.5 mm），悬浮材料的量与床料中可用的量成比例。从涟漪波峰上方约4 cm处向上，各个筛粒级的浓度分布非常相似，因此，该水平以上悬浮沙的粒度分布随海拔变化很小。所有这一切都表明，进入悬浮液的较细的材料不会被分选，而粗的材料将被挑选出来。
ABSTRACT Analysis of the bed sediment and suspended sediment collected at different elevations over wave ripples shows that for grain sizes larger than 0.5 mm the likelihood of entrainment into suspension decreases with increasing grain size, whereas for the finer material (diameter smaller than 0.5 mm) the amount of suspended material is proportional to the amount available in the bed material. The concentration profiles for individual sieve fractions very similar upwards from about 4 cm above the ripple crest, so that the grain-size distribution for suspended sand above this level varies very little with elevation. All of this taken together indicates that the finer material that goes into suspension is not going to be sorted whereas the coarsest material will be singled out.