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Published online 6 July 2006
Published in J Environ Qual 35:1248-1259 (2006)
DOI: 10.2134/jeq2006.0015
© 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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Role of Rainfall Intensity and Hydrology in Nutrient Transport via Surface Runoff

Peter J. A. Kleinman*, M. S. Srinivasan, Curtis J. Dell, John P. Schmidt, Andrew N. Sharpley and Ray B. Bryant

USDA–ARS, Pasture Systems and Watershed Management Research Unit, 3702 Curtin Road, University Park, PA 16802


Figure 1
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  		Fig. 1. Location of study site in eastern USA and 1-m contour map of hillslope showing location of runoff plots in Albrights (shaded) and Berks (unshaded) soils. Each set of plots includes four abutting pairs of 1 by 2 m runoff plots (eight plots per set).

 

Figure 2
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  		Fig. 2. Layout of paired runoff plots illustrating dimensions of abutting plots, separate runoff collection drains for each plot, location of soil moisture measurements within each plot, and location of 5-cm cores used to evaluate surface soil properties of each plot.

 

Figure 3
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  		Fig. 3. Conversion of rainfall into runoff, represented by runoff to rainfall ratio (runoff/rainfall) for 5 min intervals over the duration of rain simulation event.

 

Figure 4
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  		Fig. 4. Mean concentrations of dissolved reactive phosphorus (DRP) and total phosphorus (TP) in runoff during Day 1 and 2 runoff periods for May and September rainfall events.

 

Figure 5
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  		Fig. 5. Mean concentrations of SS in runoff over time on Days 1 and 2 of May and September rainfall simulations.

 

Figure 6
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  		Fig. 6. Mean concentrations of NO3–N in runoff over time on Days 1 and 2 of May and September rainfall simulations.

 




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