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Verification of sediment transport rate parameter on cross-shore sediment transport analysis

机译：跨岸输沙分析中输沙速率参数的验证

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摘要

The sediment transport parameter helps determining the amount of sediment transport in cross-shore direction. The sediment transport parameter therefore, should represent the effect of necessary environmental factors involved in cross-shore beach profile formation. However, all the previous studies carried out for defining shape parameter consider the parameter as a calibration value. The aim of this study is to add the effect of wave climate and grain size characteristics in the definition of transport rate parameter and thus witness their influence on the parameter. This is achieved by taking the difference in between "the equilibrium wave energy dissipation rate" and "the wave energy dissipation rate" to generate a definition for the bulk of sediment, dislocating within a given time interval until the beach tends reach an equilibrium conditions. The result yields that empirical definition of transport rate parameter primarily governs the time response of the beach profile. Smaller transport rate value gives a longer elapsed time before equilibrium is attained on the beach profile. It is shown that any significant change in sediment diameter or wave climate proportionally increases the value of the shape parameter. However, the effect of change in wave height or period on sediment transport parameter is not as credit to as mean sediment characteristics.
机译：泥沙输送参数有助于确定跨岸方向的泥沙输送量。因此，沉积物输运参数应该代表跨岸​​海滩剖面形成所必需的环境因素的影响。但是，为定义形状参数而进行的所有先前研究都将参数视为校准值。这项研究的目的是在定义运输速率参数时增加波浪气候和粒度特征的影响，从而见证它们对参数的影响。这是通过获取“平衡波能量耗散率”和“波浪能量耗散率”之间的差以生成大量沉积物的定义来实现的，该沉积物在给定的时间间隔内发生位移，直到海滩趋于达到平衡状态为止。结果表明，经验性的运输速率参数定义主要决定着海滩剖面的时间响应。较小的传输速率值会导致在海滩轮廓上达到平衡之前需要较长的时间。结果表明，沉积物直径或波浪气候的任何重大变化都会成比例地增加形状参数的值。但是，波高或周期的变化对沉积物输运参数的影响并不像平均沉积物特征那样可信。

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