JEQ
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 9 January 2007
Published in J Environ Qual 36:80-90 (2007)
DOI: 10.2134/jeq2006.0096
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Abstract Freely available
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Mehnert, E.
Right arrow Articles by Holm, T. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mehnert, E.
Right arrow Articles by Holm, T. R.
GeoRef
Right arrow GeoRef Citation
Agricola
Right arrow Articles by Mehnert, E.
Right arrow Articles by Holm, T. R.
Related Collections
Right arrow Watershed-Scale Studies
Right arrow Nutrients
Right arrow Nutrient Cycling

Denitrification in the Shallow Ground Water of a Tile-Drained, Agricultural Watershed

Edward Mehnerta,*, Hue-Hwa Hwanga, Thomas M. Johnsonb, Robert A. Sanfordb, Will C. Beaumontb and Thomas R. Holmc

a Illinois State Geological Survey, 615 E. Peabody Dr., Champaign, IL 61820
b Dep. of Geology, Univ. of Illinois at Urbana-Champaign, 1301 West Green St., Urbana, IL 61801
c Illinois State Water Survey, 2204 Griffith Dr., Champaign, IL 61820


Figure 1
View larger version (73K):
[in this window]
[in a new window]

  		Fig. 1. Location map showing the Big Ditch watershed and data collection sites. Inset map shows the position of the watershed in Illinois, United States.

 

Figure 2
View larger version (13K):
[in this window]
[in a new window]

  		Fig. 2. Precipitation at Rantoul, IL.

 

Figure 3
View larger version (49K):
[in this window]
[in a new window]

  		Fig. 3. Streamflow and nitrate N concentration in Big Ditch (Keefer and Bauer, 2005). The bars along the x axis shows periods of base flow only.

 

Figure 4
View larger version (21K):
[in this window]
[in a new window]

  		Fig. 4. Nitrogen species concentrations in all ground water samples.

 

Figure 5
View larger version (24K):
[in this window]
[in a new window]

  		Fig. 5. Concentrations of (a) total N and (b) NO3––N in all wells. Filled symbols indicate the wells sampled for N and O isotopes.

 

Figure 6
View larger version (16K):
[in this window]
[in a new window]

  		Fig. 6. Box plot of dissolved oxygen in the shallow ground water of the Big Ditch watershed.

 

Figure 7
View larger version (16K):
[in this window]
[in a new window]

  		Fig. 7. Nitrogen and oxygen isotope ratio data. Open circles represent tile drain samples. Closed circles, diamonds, triangles, and squares represent samples from Wells 3, 5, 6, and 11, respectively. The solid line represents the evolution of a hypothetical packet of water with initial {delta}15N = {delta}18O = 5.0 as it undergoes denitrification with {varepsilon} = 12.0{per thousand} for N and 5.7{per thousand} for O. Uncertainties are smaller than the sizes of the symbols.

 




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Vadose Zone Journal Journal of Plant Registrations
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Copyright © 2007 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.