Full TGIF Record # 134925
Item 1 of 1
DOI:10.2134/jeq2007.0102
Web URL(s):https://dl.sciencesocieties.org/publications/jeq/articles/37/2/669
    Last checked: 11/07/2016
    Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/37/2/669
    Last checked: 11/08/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Robertson, William D.; Schiff, Sherry L.
Author Affiliation:Department of Earth and Environment Sciences, University of Waterloo, Waterloo, Ontario, Canada
Title:Persistent elevated nitrate in a riparian zone aquifer
Section:Technical reports: Ground water quality
Other records with the "Technical reports: Ground water quality" Section
Source:Journal of Environmental Quality. Vol. 37, No. 2, March/April 2008, p. 669-679.
Publishing Information:Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
# of Pages:11
Keywords:TIC Keywords: Riparian zones; Aquifers; Nitrates; Buffer zones; Groundwater; Denitrification; Carbon
Abstract/Contents:"Streamside vegetated buffer strips (riparian zones) are often assumed to be zones of ground water nitrate (NO3-) attenuation. At a site in southwestern Ontario (Zorra site), detailed monitoring revealed that elevated NO3-N (4-93 mg L-1) persisted throughout a 100-m-wide riparian floodplain. Typical of riparian zones, the site has a soil zone of recent river alluvium that is organic carbon (OC) rich (36 ± 16 g kg-1). This material is underlain by an older glacial outwash aquifer with a much lower OC content (2.3 ± 2.5 g kg-1). Examination of NO3-, Cl-, SO42-2, and dissolved organic carbon (DOC) concentrations; N/Cl ratios; and NO3- isotopic composition ({delta}15N and {delta}18O) provides evidence of four distinct NO3- source zones within the riparian environment. Denitrification occurs but is incomplete and is restricted to a narrow interval located within ~0.5 m of the alluviumaquifer contact and to one zone (poultry manure compost zone) where elevated DOC persists from the source. In older ground water close to the river discharge point, denitrification remains insufficient to substantially deplete NO3-. Overall, denitrification related specifically to the riparian environment is limited at this site. The persistence of NO3- in the aquifer at this site is a consequence of its Pleistocene age and resulting low OC content, in contrast to recent fluvial sediments in modern agricultural terrain, which, even if permeable, usually have zones enriched in labile OC. Thus, sediment age and origin are additional factors that should be considered when assessing the potential for riparian zone denitrification."
Language:English
References:49
Note:Figures
Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Robertson, W. D., and S. L. Schiff. 2008. Persistent elevated nitrate in a riparian zone aquifer. J. Environ. Qual. 37(2):p. 669-679.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=134925
If there are problems with this record, send us feedback about record 134925.
Choices for finding the above item:
DOI: 10.2134/jeq2007.0102
Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/articles/37/2/669
    Last checked: 11/07/2016
    Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/pdfs/37/2/669
    Last checked: 11/08/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Find Item @ MSU
MSU catalog number: b2225072a
Find from within TIC:
   Digitally in TIC by record number.
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)