Because of its size and geographical position, the Cherbourg roadstead appears as a favourable site for Marine Renewable Energy (MRE) industry. As a result, Cherbourg harbour has undergone profound changes (2015 and 2016) due to the installation of industrial infrastructures to service the needs of expanding MRE further offshore. However, little is known about the morpho-sedimentary distribution and associated dynamics of seabed sediments before and after harbour transformations. This study focuses on sedimentary dynamics using detailed morphological and sedimentological analyses based on data acquired before changes (2012). The main map includes a unique bathymetric map (1:35,000) and sedimentary maps showing the percentage of the characteristic grain size fractions of 184 seabed samples. Despite the high tidal conditions, the roadstead construction had a significant impact on the sedimentary facies and distribution. This study provides a basis for future investigations on geomorphological evolution linked to the impact of anthropogenic development.

由于其规模和地理位置，瑟堡道路工地似乎是海洋可再生能源（MRE）行业的有利地点。结果，由于安装了工业基础设施以满足不断扩展的MRE进一步离岸的需求，瑟堡港发生了深刻的变化（2015年和2016年）。但是，关于港口改造前后海床沉积物的形态沉积沉积及其相关动力学知之甚少。本研究着重于沉积动力学，其方法是基于详细的形态学和沉积学分析，基于变化前获得的数据（2012年）。主图包括一个独特的测深图（1：35,000）和沉积图，它们显示了184个海底样品的特征晶粒尺寸分数的百分比。尽管潮汐条件很高，道路建设对沉积相和分布有重大影响。这项研究为与人为发展的影响有关的地貌演化的未来研究提供了基础。