Agronomy Journal Grow Your Career With ASA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Agron J 91:177-182 (1999)
© 1999 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
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 Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Web of Science (21)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Wu, L.
Right arrow Articles by Lamb, J. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Wu, L.
Right arrow Articles by Lamb, J. A.
Agricola
Right arrow Articles by Wu, L.
Right arrow Articles by Lamb, J. A.

Evaluation of the Root Zone Water Quality Model Using Field-Measured Data from a Sandy Soil

Laosheng Wu, W. Chen*, John M. Baker and John A. Lamb

Dep. of Soil and Environmental Sciences, Univ. of California, Riverside, CA 92521
AgrEvo Research Center (formerly Dep. of Soil, Water and Climate, Univ. of Minn.), 703 NORAM Rd. Pikeville, NC 27863
USDA-ARS and Dep. of Soil, Water and Climate, Univ. of Minnesota, 439 Borlaug Hall, 1991 Buford Cir., St. Paul, MN 55108.
Dep. of Soil, Water and Climate, Univ. of Minnesota, 439 Borlaug Hall, 1991 Buford Cir., St. Paul, MN 55108

* Corresponding author (laowu{at}ucracl.ucr.edu).

Testing of simulation models against field-measured data is an important step that must be taken before a model can be used as a management tool. Field soil water contents, intensively measured by time-domain reflectometry (TDR) on a Zimmerman fine sand soil (Argic Udipsamments) in the Minnesota Management System Evaluation Area (MSEA), were used to evaluate the Root Zone Water Quality Model (RZWQM) over two rotated crop growing seasons in 1992 (corn, Zea mays L.) and 1993 [soybean, Glycine max (L.) Merr.]. The model was evaluated based on laboratory-measured soil hydraulic properties. Reasonable agreement exists between the daily TDRmeasured and RZWQM-predicted water contents for the upper soil depths. However, the model overestimated the lower soil profile, leading to a consistent overestimation of the total water depth (TWO) in the entire root zone (0 to 150 cm) during both the 1992 and 1993 growing seasons. The maximum errors in TWD for the entire root zone were 2.47 and 2.77 cm, respectively, in 1992 and 1993. Predictions of solute transport by RZWQM were examined for three herbicides: atrazine [6-chloro-N-ethyl-N'-(l-methylethyl)-l,3,5-triazine-2,4-diamine], alachlor [2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl) acetamide], and metribuzin [4-amino-6-(l,l-dimethylethyl)-3- (methylthio)-1,2,4-triazin-5(4H)-one]. Comparison between measured and predicted soil herbicide concentrations averaged over the top 15-cm layer showed that the model matched the temporal changes of the field measurements reasonably well, although the measurements showed that all pesticides were somewhat more persistent over time than the model predicted.

Received for publication December 2, 1996.


This article has been cited by other articles:


Home page
 J. Environ. Qual.Home page
Q. Fang, L. Ma, Q. Yu, R. W. Malone, S. A. Saseendran, and L. R. Ahuja
Modeling Nitrogen and Water Management Effects in a Wheat-Maize Double-Cropping System
J. Environ. Qual., October 23, 2008; 37(6): 2232 - 2242.
[Abstract] [Full Text] [PDF]

Home page
 J. Environ. Qual.Home page
E. R. Bayless, P. D. Capel, J. E. Barbash, R. M. T. Webb, T. L. C. Hancock, and D. C. Lampe
Simulated Fate and Transport of Metolachlor in the Unsaturated Zone, Maryland, USA
J. Environ. Qual., May 1, 2008; 37(3): 1064 - 1072.
[Abstract] [Full Text] [PDF]

Home page
 Vadose Zone JHome page
C. Hu, S. A. Saseendran, T. R. Green, L. Ma, X. Li, and L. R. Ahuja
Evaluating Nitrogen and Water Management in a Double-Cropping System Using RZWQM
Vadose Zone J., March 8, 2006; 5(1): 493 - 505.
[Abstract] [Full Text] [PDF]

Home page
 J. Environ. Qual.Home page
S. A. Cryer
Predicting Soil Fumigant Air Concentrations under Regional and Diverse Agronomic Conditions
J. Environ. Qual., November 7, 2005; 34(6): 2197 - 2207.
[Abstract] [Full Text] [PDF]

Home page
 Agron. J.Home page
S. A. Saseendran, L. Ma, D. C. Nielsen, M. F. Vigil, and L. R. Ahuja
Simulating Planting Date Effects on Corn Production Using RZWQM and CERES-Maize Models
Agron. J., January 1, 2005; 97(1): 58 - 71.
[Abstract] [Full Text] [PDF]

Home page
 Agron. J.Home page
S. A. Saseendran, D. C. Nielsen, L. Ma, L. R. Ahuja, and A. D. Halvorson
Modeling Nitrogen Management Effects on Winter Wheat Production Using RZWQM and CERES-Wheat
Agron. J., May 1, 2004; 96(3): 615 - 630.
[Abstract] [Full Text] [PDF]

Home page
 J. Environ. Qual.Home page
A. Bakhsh, J. L. Hatfield, R. S. Kanwar, L. Ma, and L. R. Ahuja
Simulating Nitrate Drainage Losses from a Walnut Creek Watershed Field
J. Environ. Qual., January 1, 2004; 33(1): 114 - 123.
[Abstract] [Full Text] [PDF]

Home page
 Agron. J.Home page
A. A. Andales, L. R. Ahuja, and G. A. Peterson
Evaluation of GPFARM for Dryland Cropping Systems in Eastern Colorado
Agron. J., November 1, 2003; 95(6): 1510 - 1524.
[Abstract] [Full Text] [PDF]

Home page
 Agron. J.Home page
D. C. Nielsen, L. Ma, L. R. Ahuja, and G. Hoogenboom
Simulating Soybean Water Stress Effects with RZWQM and CROPGRO Models
Agron. J., November 1, 2002; 94(6): 1234 - 1243.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1999 by the American Society of Agronomy.