Effect of grass buffer strips on nitrate export from a tile-drained field site

Manon Janssen, Johanna Frings and Bernd Lennartz

Agricultural Water Management, 2018, vol. 208, issue C, 318-325

Abstract: Vegetated buffer strips may reduce nutrient inputs from agricultural land into surface waters. Their effectiveness at tile-drained fields, though, remains unclear. The objective of this study was to quantify nitrate reduction in the groundwater underneath a buffer strip, to evaluate the effect of buffer strip width, and to assess their impact on nitrate loading in a drainage ditch. The study site was a tile-drained lowland field on glacial till in north-eastern Germany. The investigated grass buffer strips were 7, 3 and 1 m wide. Water levels and nitrate concentrations in 29 monitoring wells and in the adjacent ditch were measured during three winter half-years. Groundwater nitrate loads were calculated based on a simple Darcy approach.

Keywords: Tile drainage; Groundwater; Vegetated filter strips; Riparian zone (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:208:y:2018:i:c:p:318-325

DOI: 10.1016/j.agwat.2018.06.026

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