Center for Integrated Building Design Research Jan 2009 | Page 25

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Horizontal Wetlands
To minimize evaporation, a fabric mat is laid under the
system and can hold water from one foot to 18 inches
beneath the surface. This forms an anaerobic system,
which reduces surface ponding and allows only minimal
evaporation, which is responsible for the loss of 1,000
gallons of water per day. The wide open design allows the
wetlands to