摘要
概述河口海岸地区航道附近浮泥存在成因及研究现状 ,将浮泥作为宾汉体 ,根据双层流模型的运动基本方程 ,推导出一维定常状态下浮泥运动速度与浮泥厚度、上层水流运动速度、底面坡度、浮泥密度、浮泥脱水速度、浮泥上层水体悬沙浓度、悬沙沉降速度、水深之间的关系及非定常状态一维浮泥运动简化方程。
The formation mechanism and research state of fluid mud in the vicinity of waterways in the coastal and estuary zone are briefly described.In accordance with the basic motion equation of two-layer current model, the fluid mud is treated as Bingham fluid and a 1D equation is derived to describe the relation between the fluid mud motion velocity and the fluid mud thickness,the current velocity upon the fluid mud surface,the bed slope,the fluid mud density,the dehydration velocity of the fluid mud,the suspended sediment concentration of the water body upon the fluid mud layer,the settling velocity of the suspended particle and water depth.Then,a simplified 1D fluid mud motion equation under the unsteady state is obtained.Finally, taking the sidecast dredging at the lower reach of North Channel in the Yangtze Estuary as an example, the fluid mud motion distances under different current situations are calculated and analyzed.
出处
《泥沙研究》
CSCD
北大核心
2002年第4期52-56,共5页
Journal of Sediment Research
基金
河海大学港航学院基金资助 ( 3833)
