Circulation during Storms and Dynamics of Suspended Matter in a Sheltered Coastal Area
Circulation during Storms and Dynamics of Suspended Matter in a Sheltered Coastal Area
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DOI：
10.3390/rs10040602
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发表时间：
2018-04
期刊：
影响因子：
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通讯作者：
F. D. Mendoza;S. Bonamano;R. Martellucci;C. Melchiorri;Natalizia Consalvi;V. Piermattei;M. Marcelli
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文献类型：
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作者：
F. D. Mendoza;S. Bonamano;R. Martellucci;C. Melchiorri;Natalizia Consalvi;V. Piermattei;M. Marcelli
盖塔湾位于意大利中部的西部边缘，其特点是沿海地貌形成了一个天然的庇护区，细小的沉积物在其中沉积。新的港口监管计划规定了码头扩建和疏浚工程，这可能会改变悬浮颗粒物(SPM)的浓度。本文对盖塔湾的动力进行了研究，重点研究了影响细颗粒浓度的动力过程。这项研究是通过多学科方法进行的，涉及遥感采集(卫星图像和X波段雷达)、现场测量(水样、波浪浮标、气象站、浑浊站、CTD剖面)和数值模拟(SWAN和Delft3D Flow)。X波段雷达系统支持对SPM浓度的动态过程的分析，为水动力模型的验证提供了有用的大型数据集。分析表明，在区域尺度上，邻近河流对大气颗粒物的调制作用较强。海湾内SPM浓度的短期高低波动是由主要物理力量的局部效应触发的。特别是，事件的方向和底泥再悬浮对SPM浓度的调节起着关键作用，而小潮制度似乎并不影响研究区的浊度。这一办法是从海洋沿海生态系统可持续人类活动的角度改进长期沿海管理战略的重要工具。
The Gulf of Gaeta, in the western margin of central Italy, is characterized by a coastal morphology that creates a natural sheltered area in which fine sediment settles. The new port regulatory plan provides for dock expansions and dredging works that could alter the suspended particulate matter (SPM) concentration. The present study investigates the dynamics of the Gulf of Gaeta with a focus on the dynamic processes that affect the fine particle concentration. The study was conducted through a multidisciplinary approach that involves remote sensing acquisitions (satellite imagery and X-band radar), measurements in situ (water sampling, wave buoy, weather station, turbidity station, CTD profiles), and numerical modelling (SWAN and Delft3D FLOW). The X-band radar system supports the analysis of the dynamic processes of the SPM concentration providing a large dataset useful for the hydrodynamic model’s validation. The analysis reveals a strong influence of nearby rivers in modulating the SPM at the regional scale. Short-term high and low fluctuations in SPM concentration within the gulf are triggered by the local effect of the main physical forces. In particular, the direction of events and bottom sediment resuspension play a key role in modulating the SPM concentration while micro-tidal regime does not appear to influence turbidity in the study area. This approach represents an important tool in improving the long-term coastal management strategy from the perspective of sustainable human activities in marine coastal ecosystems.