AN ENERGETICS TOTAL LOAD SEDIMENT TRANSPORT MODEL FOR A PLANE SLOPING BEACH
AN ENERGETICS TOTAL LOAD SEDIMENT TRANSPORT MODEL FOR A PLANE SLOPING BEACH
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DOI：
10.1029/jc086ic11p10938
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发表时间：
1981-01-01
影响因子：
3.6
通讯作者：
BAILARD, JA
中科院分区：
文献类型：
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作者：
BAILARD, JA
Bagnold的基于能量学的河流总负荷输沙模型被用作开发平面倾斜床上时变输沙的总负荷模型的基础。在推移质和悬移质中，输沙率矢量由平行于瞬时速度矢量的速度诱导分量和向下倾斜的重力诱导分量组成。该模型适用于理想化的冲浪区条件，导致当地沿岸和陆上-海上泥沙输运率以及平衡海滩坡度的估计作为当地波浪和水流条件的函数。该模型与非线性沿岸流模型相结合，并在空间上集成，以获得预测的总沿岸输运率作为入射波条件的函数。结果支持波功率方程的一般形式，只是波功率系数不再是常数，而是入射波和海滩特性的复杂函数。
Bagnold's energetics‐based total load sediment transport model for streams is used as a basis for the development of a total load model of time varying sediment transport over a plane sloping bed. In both the bedload and suspended load, the transport rate vectors are found to be composed of a velocity‐induced component directed parallel to the instantaneous velocity vector and a gravity‐induced component directed down slope. The model is applied to idealized surfzone conditions, leading to estimates of the local longshore and onshore‐offshore sediment transport rates as well as the equilibrium beach slope as a function of the local wave and current conditions. The model is combined with a nonlinear longshore current model and spatially integrated to obtain predictions of the total longshore transport rate as a function of the incident wave conditions. The results support the general form of the wave power equation except that the wave power coefficient is no longer constant but is instead a complex function of the incident wave and beach characteristics.