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Modeling the sediment dynamics in the gulf of Uraba, Colombian Caribbean sea

机译：模拟哥伦比亚加勒比海乌拉巴湾的沉积物动力学

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摘要

The potential of the gulf of Uraba to hold a multi-purpose port motivated a sediment dynamics study to describe the seasonal sediment concentration patterns in this tropical region. Challenges addressed in this study include a complex three-dimensional flow pattern in a tropical estuary and the lack of in-situ measurements. To overcome such challenges, this study completed: (i) Measurements of suspended sediment concentrations during two climatic seasons and an extreme event (2010-2011); (ii) Definition of boundary conditions from global databases; (iii) Qualitative analysis of sediment concentrations from satellite imagery; and (iv) integration of the previously mentioned steps to build a process-based 3D sediment transport model. Seasonal patterns of suspended sediment concentrations were identified and corroborated by the agreement between model results, satellite imagery and field measurements. During the calm rainy season, the Atrato River turbid plume extends northward and dominates the sediment dynamics in the gulf. On the other hand, during the dry season and extreme events, bed transport is enhanced and the river's plume and the littoral drift shift southwards.
机译：乌拉巴湾拥有多用途港口的潜力激发了沉积物动力学研究，以描述该热带地区的季节性沉积物浓度模式。这项研究解决的挑战包括热带河口中复杂的三维流动模式以及缺乏现场测量。为克服这些挑战，本研究完成了：（i）在两个气候季节和一个极端事件（2010-2011年）期间测量悬浮沉积物的浓度； ii从全球数据库中确定边界条件； iii对卫星图像中的沉积物浓度进行定性分析； （iv）整合先前提到的步骤，以建立基于过程的3D泥沙输送模型。通过模型结果，卫星图像和野外测量之间的一致性，确定并证实了悬浮沉积物浓度的季节性模式。在平静的雨季，阿特拉托河的浑浊烟羽向北延伸，并主导着海湾中的沉积物动力学。另一方面，在旱季和极端事件期间，河床运输得到加强，河流的羽流和沿岸漂流向南移动。

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