UFC 3-210-10
25 October 2004
8-9.4
Corrective Actions. Corrective action for structure or device failure typically
requires removal and replacement of the device. Excessive bypass of sediments or
pollutants may require additional devices or modification of the device.
8-10
RAIN BARRELS. Rain barrels are placed outside of a building at roof
downspouts to store rooftop runoff for later reuse in lawn and garden watering.
Cisterns also collect rooftop runoff but store the water in significantly larger volumes in
manufactured tanks or built underground storage areas. Both cisterns and rain barrels
can be implemented without the use of pumping devices, instead relying on gravity flow.
Figure 8-9. Rain Barrel
screened input
flexible, transparent hose
barrel water level
visible through hose
drop hose below
barrel water level
to obtain water
Source: Maryland DNR Green Building Program.
Figure 8-10. Cistern
Source: Texas Guide to Rainwater Harvesting.
8-10.1
Most Appropriate Uses. Rain barrels and cisterns are low-cost water
conservation devices that reduce runoff volume and, for very small storm events, delay
and reduce the peak runoff flow rates. Both rain barrels and cisterns can provide a
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