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Published online 24 October 2007
Published in J Environ Qual 36:1843-1855 (2007)
DOI: 10.2134/jeq2007.0064
© 2007 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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The Treatment Performance of Different Subsoils in Ireland Receiving On-Site Wastewater Effluent

L. W. Gill*, C. O'Súlleabháin, B. D. R. Misstear and P. J. Johnston

Dep. of Civil, Structural and Environmental Engineering, Univ. of Dublin, Trinity College, Dublin 2, Ireland


Figure 1
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  		Fig. 1. Instrumentation layout: (a) cross-section of trench and (b) plan view of trenches.

 

Figure 2
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  		Fig. 2. Site 1: chloride loading rates at the different sample position depths (0.3, 0.6, 1.0 m) along the percolation trench length (0, 10, 20 m).

 

Figure 3
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  		Fig. 3. Site 1: average chloride loading rates across all depth planes across the percolation area.

 

Figure 4
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  		Fig. 4. Site 2: average chloride concentrations at the 0.3-m depth plane at the three sample positions (0, 10, 20 m) along the trenches.

 

Figure 5
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  		Fig. 5. Site 2: average chloride concentration measured on the three depth planes (0.3, 0.6, 1.0 m) at the 0-m sample position.

 

Figure 6
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  		Fig. 6. Bromide tracer study results for showing time after injection of tracer that bromide levels over 0.2 mg L–1 were first picked up at the different sampling positions on (a) Site 1 and (b) Site 2. [D2 = 2 d after injection, n = not picked up by 8 d, – = no sample]

 

Figure 7
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  		Fig. 7. Site 2: soil moisture tension plotted against effective rainfall for the 20-m sample position.

 

Figure 8
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  		Fig. 8. Site 2: soil moisture tension plotted against effective rainfall for the 0-m sample position.

 




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