Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 416919
Title A novel method to determine buffer strip effectiveness on deep soils
Author(s) Heinen, M.; Noij, I.G.A.M.; Heesmans, H.I.M.; Groenigen, J.W. van; Groenendijk, P.; Thissen, J.T.N.M.
Source Journal of Environmental Quality 41 (2012)2. - ISSN 0047-2425 - p. 334 - 347.
DOI https://doi.org/10.2134/jeq2010.0452
Department(s) SS - Soil Physics and Land Use
CWC - Integrated Water Resources Management
Chair Soil Biology and Biological Soil Quality
CWC - Integrated Water Resources Management
Biometris (PPO/PRI)
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) vegetative filter strips - (h2o)-o-18 transport model - nonpoint-source pollution - stream riparian zones - shallow ground-water - stable-isotope hdo - nitrogen removal - nitrate removal - surface-water - agricultural watersheds
Abstract Unfertilized buffer strips (BS) generally improve surface water quality. High buffer strip effectiveness (BSE) has been reported for sloping shallow aquifers, but experimental data for plain landscapes with deeply permeable soils is lacking. We tested a novel method to determine BSE on a 20-m-deep, permeable sandy soil. Discharge from soil to ditch was temporarily collected in an in-stream reservoir to measure its quantity and quality, both for a BS and a reference (REF) treatment. Treatments were replicated once for the first, and three times for the next three leaching seasons. No significant BSE was obtained for nitrogen and phosphorus species in the reservoirs. Additionally, water samples were taken from the upper groundwater below the treatments. The effect of BS for nitrate was much bigger in upper groundwater than in the reservoirs that also collected groundwater from greater depths that were not influenced by the treatments. We conclude that measuring changes in upper groundwater to assess BSE is only valid under specific hydrogeological conditions. We propose an alternative experimental set-up for future research, including extra measurements before installing the BS and REF treatments to deal with spatial and temporal variability. The use of such data as covariates will increase the power of statistical tests by decreasing between-reservoir variability.
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