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首页> 外文期刊>Journal of earth system science >Investigating suspended-sediment transport in a shallow lake using a three-dimensional hydrodynamic and sediment model
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Investigating suspended-sediment transport in a shallow lake using a three-dimensional hydrodynamic and sediment model

机译：利用三维水动力和泥沙模型研究浅水湖泊中的悬浮泥沙运移

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A three-dimensional, unstructured-grid hydrodynamic and suspended-sediment transport model was developed to simulate the temporal and spatial variations of suspended sediment and was applied to the subtropical subalpine Tsuei-Feng Lake (TFL) of Taiwan. The model was validated with measured water level and suspended-sediment concentration in 2009, 2010 and 2011. The overall model simulation results are in quantitative agreement with the observational data. The validated model was then applied to explore the most important parameter that affects the suspended-sediment concentration and to investigate the effect of wind stress on the mean current and suspended-sediment distribution in this shallow lake. Modelling results of the sensitivity analysis revealed that the settling velocity is a crucial parameter and the erosion rate is less important in the suspended-sediment transport model. Remarkable lake circulation was found based on the strength of wind speed and wind direction. A strong wind would result in a higher mean current in the top layer and suspended-sediment distribution in the top and bottom layers. This study demonstrated that wind stress played a significant influence on mean circulation and suspended-sediment transport in a shallow lake.
机译：建立了三维非结构网格水动力和泥沙输送模型，模拟了泥沙的时空变化，并将其应用于台湾亚热带亚高山翠峰湖（TFL）。该模型在2009年，2010年和2011年通过测得的水位和悬浮泥沙浓度进行了验证。总体模型仿真结果与观测数据定量吻合。然后，将经过验证的模型应用于探索影响悬浮泥沙浓度的最重要参数，并研究风应力对该浅湖中平均电流和悬浮泥沙分布的影响。敏感性分析的模型结果表明，沉降速度是一个关键参数，在悬浮泥沙输运模型中侵蚀速率的重要性较小。根据风速和风向的强弱，发现了明显的湖泊环流。强风将导致顶层的平均电流较高，顶层和底层的悬浮泥沙分布较大。这项研究表明，风应力对浅湖中的平均循环和悬浮泥沙的输送有重要影响。

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