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→Water balance
|40 %
|40 %
|70 %
|70 %
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|North Carolina, USA<ref>Carmen, N.B., Hunt, W.F., Andersen, A.R. 2016. Volume Reduction Provided by Eight Residential Disconnected Downspouts in Durham, North Carolina. Journal of Environmental Engineering. 142(10): 05016002.</ref>
|57 %
|72 %
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