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Efficiency of mitigation measures targeting nutrient losses from agricultural drainage systems: A review.

ABSTRACT: Diffusive losses of nitrogen and phosphorus from agricultural areas have detrimental effects on freshwater and marine ecosystems. Mitigation measures treating drainage water before it enters streams hold a high potential for reducing nitrogen and phosphorus losses from agricultural areas. To achieve a better understanding of the opportunities and challenges characterising current and new drainage mitigation measures in oceanic and continental climates, we reviewed the nitrate and total phosphorus removal efficiency of: (i) free water surface constructed wetlands, (ii) denitrifying bioreactors, (iii) controlled drainage, (iv) saturated buffer zones and (v) integrated buffer zones. Our data analysis showed that the load of nitrate was substantially reduced by all five drainage mitigation measures, while they mainly acted as sinks of total phosphorus, but occasionally, also as sources. The various factors influencing performance, such as design, runoff characteristics and hydrology, differed in the studies, resulting in large variation in the reported removal efficiencies.

SUBMITTER: Carstensen MV

PROVIDER: S-EPMC7502647 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Efficiency of mitigation measures targeting nutrient losses from agricultural drainage systems: A review.

Carstensen Mette Vodder MV Hashemi Fatemeh F Hoffmann Carl Christian CC Zak Dominik D Audet Joachim J Kronvang Brian B

Ambio 20200603 11

Diffusive losses of nitrogen and phosphorus from agricultural areas have detrimental effects on freshwater and marine ecosystems. Mitigation measures treating drainage water before it enters streams hold a high potential for reducing nitrogen and phosphorus losses from agricultural areas. To achieve a better understanding of the opportunities and challenges characterising current and new drainage mitigation measures in oceanic and continental climates, we reviewed the nitrate and total phosphoru ...[more]

PMID: 32494964

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Dataset Information

Efficiency of mitigation measures targeting nutrient losses from agricultural drainage systems: A review.

Publications

Efficiency of mitigation measures targeting nutrient losses from agricultural drainage systems: A review.

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