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Published online 6 July 2006
Published in J Environ Qual 35:1204-1212 (2006)
DOI: 10.2134/jeq2005.0286
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Distance and Flow Effects on Microsphere Transport in a Large Gravel Column

Murray E. Close*, Liping Pang, Mark J. Flintoft and Lester W. Sinton

Institute of Environmental Science & Research Ltd., P.O. Box 29181, Christchurch, New Zealand


Figure 1
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  		Fig. 1. Observed (solid symbols) and model-simulated (dotted line) concentrations at 2, 4, 6, and 8 m under intermediate flow velocity for Br and 1- and 10-µm spheres. The term c is the concentration in solution and co is the injected concentration.

 

Figure 2
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  		Fig. 2. Concentrations of 1-µm spheres at 3- and 8-m distances determined from spectrofluorimeter and particle counter for the intermediate flow velocity. The term c is the concentration in solution and co is the injected concentration.

 

Figure 3
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  		Fig. 3. Relationship between transport distance and concentration of microspheres for (a) Experiment 04 and (b) Experiment 02. The term F or P denotes whether analysis was by fluorimetry or particle counting, respectively; all analyses for Experiment 02 used particle counting. The term cmax is the maximum observed concentration in solution and co is the injected concentration.

 

Figure 4
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  		Fig. 4. Impact of transport distance on attachment rate coefficient (katt) for (a) Experiment 04 and (b) Experiment 02. The term F or P denotes whether analysis was by fluorimetry or particle counting, respectively; all analyses for Experiment 02 used particle counting.

 




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