field tests of alternative covers in the alternative cover ... · field tests of alternative covers...
TRANSCRIPT
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Field Tests of Alternative Covers in the Alternative Cover Assessment Program
(ACAP)
William H. Albright Desert Research Institute
Craig H. BensonUniversity of Wisconsin-Madison
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Why ACAP?
� Provide field-scale data for alternative designs
� Provide field-scale data for conventional designs
� Side-by-side field tests answer question of equivalency
� Additional instrumentation to advance the science and practice of engineering
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Albany, GA
Omaha, NE
Monticello, UT
Monterey, CA
Altamont, CA
Sacramento, CA
Boardman, OR
Polson, MTHelena, MT
Cedar Rapids, IA
Cincinnati, OH
Logan, OH
Apple Valley CA
ACAP Field Sites
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1 m
Sacramento CA Thin Alternative
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1 m
Sacramento CA Thick Alternative
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1 m
Altamont CA Alternative
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Apple Valley CA Alternative
1 m
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Boardman OR Thin Alternative
1 m
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Boardman OR Thick Alternative
1 m
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Polson MT Alternative
1 m
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Helena MT Alternative
1 m
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Monticello UT Alternative
1 m
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Omaha NE Thin Alternative
1 m
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Omaha NE Thick Alternative
1 m
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Cedar Rapids IA E-Cap Alternative
1 m
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Albany GA E-Cap Alternative
1 m
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Monterey CA Alternative
1 m
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Summary• At some arid and semi-arid locations properly
designed alternative covers can limit percolation to ~1-2 mm/yr• At humid and sub-humid locations
inadequate water storage capacity and/or lower than expected transpiration rates can result in high rates of percolation• Field data suggest that performance
predictions for AEFCs are more complicated than currently believed