Usual suspects meet mission impossible: Nutrient losses and effects of mitigation measures on a coastal catchment in the Baltic Sea region

IF 5.1 2区环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL Ambio Pub Date : 2025-02-03 DOI:10.1007/s13280-025-02132-w

Faruk Djodjic, Oksana Golovko, Linda Kumblad, Emil Rydin, Sara Sandström, Elin Widén-Nilsson

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Abstract

Eutrophication of coastal areas is a global problem. A full-scale coastal remediation project was initiated in Björnöfjärden bay in the Stockholm archipelago in 2011. Measures to reduce external nutrient inputs from the surrounding catchment (15 km²) targeted agriculture, on-site wastewater treatment facilities, and horse keeping. The effects were evaluated at 22 water quality monitoring stations over 11 years (2012–2022) to determine temporal trends in nutrient concentrations, spatial correlations within and between monitored sub-catchments, and effects of individual mitigation measures at local and catchment scale. The effect of individual measures varied from no significant effect to significant nutrient decreases (21% reduction in dissolved P concentrations in one lime filter) or increases (11% higher concentrations in total P in one constructed wetland). However, few significant trends were detected at sub-catchment outlet stations. Tailored placement, design, dimensioning, and maintenance of implemented mitigation measures are needed to improve their nutrient retention effect.

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通常的嫌疑人完成了不可能完成的任务：波罗的海地区沿海集水区的营养损失和缓解措施的影响。

沿海地区的富营养化是一个全球性问题。2011年，在斯德哥尔摩群岛的Björnöfjärden湾启动了一个全面的海岸修复项目。减少周边集水区（15平方公里）外部养分输入的措施针对农业、现场废水处理设施和养马。在11年（2012-2022年）期间，对22个水质监测站的影响进行了评估，以确定营养物浓度的时间趋势、监测的子集水区内部和之间的空间相关性，以及个别缓解措施在地方和集水区尺度上的影响。个别措施的效果各不相同，从没有显著效果到显著的营养物质减少（一个石灰过滤器中溶解磷浓度减少21%）或增加（一个人工湿地中总磷浓度增加11%）。然而，在分集水口站几乎没有发现明显的趋势。需要对已实施的缓解措施进行量身定制的放置、设计、尺寸和维护，以提高其营养保留效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ambio 环境科学-工程：环境

CiteScore

14.30

自引率

3.10%

发文量

123

审稿时长

6 months

期刊介绍： Explores the link between anthropogenic activities and the environment, Ambio encourages multi- or interdisciplinary submissions with explicit management or policy recommendations. Ambio addresses the scientific, social, economic, and cultural factors that influence the condition of the human environment. Ambio particularly encourages multi- or inter-disciplinary submissions with explicit management or policy recommendations. For more than 45 years Ambio has brought international perspective to important developments in environmental research, policy and related activities for an international readership of specialists, generalists, students, decision-makers and interested laymen.