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Seafloor morphology changes in the inner-shelf area of the Pozzuoli Bay, Eastern Tyrrhenian Sea
Marine Geophysical Research ( IF 1.4 ) Pub Date : 2021-04-23 , DOI: 10.1007/s11001-021-09434-0
Gabriella Di Martino , Sara Innangi , Marco Sacchi , Renato Tonielli

Multibeam Echosounder (MBES) data collected along the coastal sector of the Pozzuoli Bay, offshore Bagnoli (Eastern Tyrrhenian Sea) reveal the morphological evolution occurred over a 10-year time span of the inner shelf area between 2 and 15 m of water depth. Horizontal and vertical errors associated with the data acquisition were computed in order to compare the accuracy of the measurements and validate the datasets comparison. A series of morphological features, located within 15 m of depth, were mapped on both Digital Terrain Models (DTMs) generated from datasets. Most of these seafloor features remained substantially unchanged over the years and were used as check points to verify the datasets accuracy, whereas other geomorphic features such as depositional bedforms and depressions, display significant changes. The difference DTM calculated from the datasets indicates that the size of the depressed areas has increased by 25–50%. Moreover, the volumes of marine deposits involved in the processes of morphological changes were also evaluated, thus providing information on the dynamics of sediment erosion, transports/redistribution and accumulation occurred over the years in the study area.



中文翻译:

第勒尼安海东部波佐利湾内陆区海底形态变化

沿巴格诺利(东第勒尼安海)近海波佐利湾沿海地区收集的多波束回声(MBES)数据显示,形态演化发生在水深2至15 m的内陆架区域10年时间跨度内。计算与数据采集相关的水平和垂直误差,以便比较测量的准确性并验证数据集的比较。在从数据集生成的两个数字地形模型(DTM)上,绘制了深度在15 m以内的一系列形态特征。这些年来,大多数这些海底特征基本保持不变,并被用作检验数据集准确性的检查点,而其他地貌特征(如沉积岩床和凹陷)则表现出显着变化。从数据集计算得出的DTM差异表明,洼地的面积增加了25%至50%。此外,还评估了形态变化过程中涉及的海洋沉积物的量,从而提供了有关研究区域多年来发生的沉积物侵蚀,运输/再分布和积累动态的信息。

更新日期:2021-04-23
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