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Riverbed infiltration galleries

5 bytes removed, 17:35, 7 April 2012
→‎Other considerations
* The top of the gallery should be ideally 1.5 metres minimum from the riverbed surface. This is so that:
#There is at least a minimum of infiltration that occurs from surface water during the wet season when the river is flooded.
#That there There is less chance that the well shaft and pipework will be washed away in a flood event. Sand becomes mobile to a certain depth which differs for different rivers but has been recorded to be normally between 0.66 and 2 metres in seasonal riverbeds.
* Graded gravel needs to be placed under and over the pipe to minimize clogging with sediments.
Winona
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