caa a22 4500 467902399 CHVBK 20180406152822.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s10661-006-7403-1 doi (NATIONALLICENCE)springer-10.1007/s10661-006-7403-1 Assessment of Temporal and Spatial Variation of Nitrate Removal in Riparian Zones [Elektronische Daten] [Karel Dhondt, Pascal Boeckx, Niko Verhoest, Georges Hofman, Oswald Van Cleemput] The aim of this study was to monitor long-term temporal and spatial groundwater NO3- removal efficiencies in different riparian zones via a limited number of sampling wells. Groundwater NO3- concentrations were measured fortnightly or monthly over a period of two years using transects of ground water sampling wells. Depending on the level of the NO3- load (up to 120mgNL-1 at the input side of the riparian zone a distance of 10 to 30m was needed to remove NO3- from the groundwater below 11.3mgNL-1. Considering all seasons, the mixed vegetation and grass riparian site succeeded to remove groundwater NO3- efficiently (92—100% within a distance of 30m. The forested riparian zone removed 72—90% of the total NO3- input within a distance of 30m. Evidence emerged that NO3- could also be removed actively at depths up to 2m, due to the presence of organically enriched layers of alluvial deposits or roots. Our four dimensional approach (three dimensional space and time), in combination with a limited number of sampling wells, was shown to be a useful monitoring tool to assess the variability of NO3- removal in riparian zones. Springer Science + Business Media, Inc., 2006 denitrification nationallicence efficiency nationallicence groundwater nationallicence nitrate nationallicence removal nationallicence riparian zone nationallicence N -immobilization nationallicence Dhondt Karel Laboratory of Applied Physical Chemistry — ISOFYS, Faculty of Bioscience Engineering, Ghent University, Belgium aut Boeckx Pascal Laboratory of Applied Physical Chemistry — ISOFYS, Faculty of Bioscience Engineering, Ghent University, Belgium aut Verhoest Niko Laboratory of Hydrology and Water Management, Faculty of Bioscience Engineering, Ghent University, Belgium aut Hofman Georges Department of Soil Management and Soil Care, Faculty of Bioscience Engineering, Ghent University, Belgium aut Van Cleemput Oswald Laboratory of Applied Physical Chemistry — ISOFYS, Faculty of Bioscience Engineering, Ghent University, Belgium aut Environmental Monitoring and Assessment Kluwer Academic Publishers 116/1-3(2006-05-01), 197-215 0167-6369 116:1-3<197 2006 116 10661 https://doi.org/10.1007/s10661-006-7403-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-7403-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dhondt Karel Laboratory of Applied Physical Chemistry — ISOFYS, Faculty of Bioscience Engineering, Ghent University, Belgium aut NATIONALLICENCE 700 1- Boeckx Pascal Laboratory of Applied Physical Chemistry — ISOFYS, Faculty of Bioscience Engineering, Ghent University, Belgium aut NATIONALLICENCE 700 1- Verhoest Niko Laboratory of Hydrology and Water Management, Faculty of Bioscience Engineering, Ghent University, Belgium aut NATIONALLICENCE 700 1- Hofman Georges Department of Soil Management and Soil Care, Faculty of Bioscience Engineering, Ghent University, Belgium aut NATIONALLICENCE 700 1- Van Cleemput Oswald Laboratory of Applied Physical Chemistry — ISOFYS, Faculty of Bioscience Engineering, Ghent University, Belgium aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 116/1-3(2006-05-01), 197-215 0167-6369 116:1-3<197 2006 116 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer