Abstract Non-point sources of pollution, primarily agricultural drainage waters, can cause eutrophication and deterioration of water bodies. Surface flow constructed wetlands (SFCWs) are an ecological solution that can represent an efficient barrier and prevent agricultural pollutants from reaching other ecosystems. However, to better manage them and to understand removal processes occurring, it is important to study SFCWs that are functioning for longer periods of time and assess their efficiencies. This study concentrates on a full-scale SFCW in the Northern Italy that is used for agricultural drainage water treatment since the year 2000. An in-deep monitoring done for two years (2018 and 2019) showed that the system achieved satisfactory retention of up to 82% for TSS and up to 78% for TN and NO3--N. TP retention seemed to be poor (-27%), but further analysis showed that the SFCW performed well in this aspect as well, and that it is important to include precipitation loads in the overall balance. Soil content of nutrients and different trace elements did not show considerable differences in respect to the beginning of the monitoring period, and the uptake rates of TN and TP by above-ground vegetation were in the range 19.0-26.3 and 1.6-2.1 g m-2, respectively.

中文翻译：

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作为意大利北部农业排水处理生态实践的全尺度人工湿地性能

摘要 面源污染，主要是农业排水，会导致水体富营养化和恶化。地表流人工湿地 (SFCW) 是一种生态解决方案，可以代表有效屏障并防止农业污染物进入其他生态系统。然而，为了更好地管理它们并了解正在发生的移除过程，重要的是研究运行时间更长的 SFCW 并评估它们的效率。本研究集中于意大利北部自 2000 年以来用于农业排水处理的全尺寸 SFCW。两年（2018 年和 2019 年）进行的深入监测表明，该系统达到了令人满意的保留率TSS 为 82%，TN 和 NO3--N 为 78%。TP 保留率似乎很差 (-27%)，但进一步的分析表明，SFCW 在这方面也表现良好，将降水负荷纳入整体平衡非常重要。土壤养分和不同微量元素含量在监测期初期未表现出明显差异，地上植被对TN和TP的吸收率在19.0-26.3和1.6-2.1 g m- 2、分别。