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Water Portal / Rainwater Harvesting / Groundwater recharge / Wells, shafts, and boreholes

526 bytes added, 23:26, 17 April 2012
→‎Construction, operations and maintenance
Sand filters can also be used instead of the PVC filter system – this is where sand replaces the need for a cover piece and the need to wait 4 hours. It can be used with rooftop catchments where no surface runoff enters the hole, and could be done with or without a PVC pipe.
 
====Water extraction====
* Water can be abstracted from the same borehole or well used for injection/recharge – this is called Aquifer Storage Recovery (ASR).
* Water can also be abstracted from a separate borehole or well than the one used for injection/recharge – this is called Aquifer Storage
Transfer and Recovery (ASTR). In the case of roof rainwater recharge systems in Mozambique, this design was used where the pump would extract water from a separate place close to the screen connected to the roof catchment.
====Maintenance====
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