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Published online 23 August 2007
Published in Vadose Zone J 6:548-553 (2007)
DOI: 10.2136/vzj2006.0095
© 2007 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Combined Effects of Rainfall Patterns and Porous Media Properties on Nitrate Leaching

Fumi Sugitaa,* and Kazuro Nakaneb

a Chiba Univ. of Commerce, Konodai 1-3-1, Ichikawa, Chiba 272-8512 Japan
b National Institute for Earth Science and Disaster Prevention, Tennodai3-1. Tsukuba, Ibaraki 305-0006 Japan

Figure 1
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  		FIG. 1. The weighing lysimeter fitted underneath the wind tunnel.

 

Figure 2
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  		FIG. 2. Chloride and nitrate profiles after 52 mm of total rain by repeating rainfall of different amounts per event in the homogeneous medium. The concentration was normalized by the concentration ratio of control tracer to the tracer applied.

 

Figure 3
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  		FIG. 3. Volumetric water content profiles 60 min and 600 min after the 4- and 13-mm rainfall applications.

 

Figure 4
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  		FIG. 4. Chloride and nitrate profiles after 52 and 104 mm of total rain by repeating 26-mm rainfalls in the homogeneous medium.

 

Figure 5
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  		FIG. 5. Chloride and nitrate profiles after 52 and 104 mm of total rain by repeating 13-mm rainfalls in the two-layered system.

 

Figure 6
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  		FIG. 6. Average water, chloride, and nitrate distributions after 104 mm of total rain as percentage of total input by mass.

 

Figure 7
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  		FIG. 7. Chloride and nitrate profiles after 52 and 104 mm of total rainfall by repeating 13-mm rainfalls in the macroporous medium.

 

Figure 8
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  		FIG. 8. Chloride and nitrate profiles after 104 mm of total rain by repeating 26-mm rainfalls in the macroporous medium.

 




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