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Case
Studies > Haddam
Demonstration Site > Rain
Garden > Results > Temperature
Temperature
Water temperatures in roof runoff and underdrain outflow were similar
through the study period. ANOVA results (above) showed that the average
temperature difference between roof runoff (inflow) and underdrain outflow
was significantly larger (negative) in winter and fall as compared to
summer months. Interestingly, the difference was negative for all seasons.
The lack of a cooling effect in the summer was surprising. The temperature
increase may be due to the relatively shallow (0.6 m) soil depth and
the short retention of water in the system due to the high permeability
of the soils. In addition, the pitched roof faces east, and may not have
absorbed as much heat as if it had a southerly exposure.
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