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Subsurface harvesting systems

2 bytes removed, 20:15, 7 April 2012
→‎Construction, operations and maintenance
* Build the crest of the underground dam at least 1 metre beneath the ground surface, so the land does not become water-logged.
* Subsurface dams should have wing walls, just like a [[sand dam]] does, where you can pile up rocks so that erosion does not occur.
* Water can be abstracted by a well a short distance up- stream upstream of the dam, or by a drain system which collects water from the upstream base of the dam and leads it to the downstream side to a well or gravity-pipe system.
* Where possible, a flushing valve is installed to facilitate cleaning of the subsurface reservoir.
Winona
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