Marine litter on Spanish beaches is assessed through two monitoring programmes: the Official Monitoring Programme of Marine Litter on Beaches (BM-1) developed by the Spanish Ministry for the Ecological Transition and the Demographic Challenge and the Citizen Science Monitoring Programme (BM-7) that provides beach litter data from voluntary clean-up initiatives. So far, the data provided by both programmes have been analysed separately although their integration could improve the assessment of the situation of Spanish beaches regarding marine litter. To this end, this paper studies the possible integration of both datasets through the calculation of a baseline value for marine litter on Spanish beaches. Statistical analysis of data shows that both datasets produce similar values and also integrate in a consistent way to achieve a value of 128 items/100 m as a baseline value for beach litter in Spain.

西班牙海滩上的海洋垃圾通过两个监测计划进行评估：由西班牙生态转型和人口挑战部制定的海滩海洋垃圾官方监测计划 (BM-1) 和公民科学监测计划 (BM-7)提供来自自愿清理计划的海滩垃圾数据。到目前为止，两个项目提供的数据已分别进行了分析，尽管它们的整合可以改进对西班牙海滩海洋垃圾状况的评估。为此，本文通过计算西班牙海滩上海洋垃圾的基线值来研究两个数据集的可能整合。