A heterogeneous amount of waste of different origins is continuously generated along Italian coasts in the Mediterranean Sea. In this paper, using information regarding the quantities and the different types of marine litter based on Project AWARE's “Dive Against Debris” data, we try to identify the main sources of this waste. In particular, the methodological approach used associates the origin of marine litter sources with the dataset of geo-localised state-owned maritime concessions, which are loaded by the granting bodies (regions, municipalities, port authorities) on the State Property Information System (Sid). The sources of marine litter were evaluated using the matrix scoring technique (MST). Then, to assess the weight of each source in each station, the community-level weighted mean (CWM) was calculated. Single-use plastic accounted for the highest percentage (19.13%), followed by glass beverage bottles (10.90%), shopping bags (9.03%), aluminium beverage cans (4.91%), and cigarette butts (4.61%).

Tourism and beach users contributed to 42.3% of the litter found, followed by fishing (15.7%) and yachting (11.3%). The overlapping of the data collected by scuba divers with the state concessions of activities from offshore and mainland areas was used to distinguish the anthropic pressures that impact the coast. Policy makers and the local administrator may use these results to define new methods of collection and reuse of anthropic waste through a more harmonised approach in the management of marine waste.

在地中海沿岸的意大利沿岸不断产生大量不同来源的异类废物。在本文中，我们使用基于Project AWARE的“防止垃圾残骸”数据得出的有关海洋垃圾数量和类型的信息，我们试图确定这种垃圾的主要来源。特别是，所使用的方法学方法将海洋垃圾来源与地理定位的国有海洋特许权数据集相关联，这些数据由授予机构（地区，市政当局，港口当局）加载到国家财产信息系统（Sid）上。 ）。使用矩阵评分技术（MST）评估了海洋垃圾的来源。然后，为了评估每个站点中每个源的权重，计算了社区级别的加权平均值（CWM）。

旅游业和海滩使用者占所发现垃圾的42.3％，其次是钓鱼（15.7％）和游艇（11.3％）。潜水员收集的数据与国家特许经营的海上和内陆地区的重叠用于区分影响海岸的人为压力。政策制定者和当地行政人员可以使用这些结果，通过在海洋废弃物管理中采用更加统一的方法来定义人类废弃物的收集和再利用的新方法。