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Direct measurements of the tile drain and groundwater flow route contributions to surface water contamination: From field-scale concentration patterns in groundwater to catchment-scale surface water quality
Soil Physics, Ecohydrology and Groundwater management Group, Wageningen University, P.O. Box 47, NL-6700 AA Wageningen, The Netherlands.
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2010 (English)In: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 158, no 12, 3571-3579 p.Article in journal (Refereed) Published
Abstract [en]

Enhanced knowledge of water and solute pathways in catchments would improve the understanding of dynamics in water quality and would support the selection of appropriate water pollution mitigation options. For this study, we physically separated tile drain effluent and groundwater discharge from an agricultural field before it entered a 43.5-m ditch transect. Through continuous discharge measurements and weekly water quality sampling, we directly quantified the flow route contributions to surface water discharge and solute loading. Our multi-scale experimental approach allowed us to relate these measurements to field-scale NO(3) concentration patterns in shallow groundwater and to continuous NO(3) records at the catchment outlet. Our results show that the tile drains contributed 90-92% of the annual NO(3) and heavy metal loads. Considering their crucial role in water and solute transport, enhanced monitoring and modeling of tile drainage are important for adequate water quality management.

Place, publisher, year, edition, pages
2010. Vol. 158, no 12, 3571-3579 p.
Keyword [en]
Water and solute transport; Flow route contributions; Catchment; Monitoring; Nitrate; Heavy metals; Groundwater; Surface water; Tile drains
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:su:diva-69027DOI: 10.1016/j.envpol.2010.08.014OAI: diva2:474864
Available from: 2012-01-10 Created: 2012-01-09 Last updated: 2012-11-09Bibliographically approved

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van der Velde, Y.
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