View of a Tube recharge. Roof or surface water flows into a pit. In the pit there is a 3- 5 meter deep (2 inch) hole filled up with sand and a PVC pipe. At the top a sand and cloth filter.
Construction of a Tube recharge pit with a sand filter and a cloth filter
On option to store rainwater in the ground and avoid a well going dry is the so called Tube recharge.
Advantages compared to water storage tanks
- – Per cubic meter, a system (pit, well, pump) is 5 times cheaper.
- – No water lost by evaporation
- – Much larger storage capacity
- – Always “fresh” water
Disadvantages compared to water storage tanks
- – Still unknown, needs specific training
- – Needs more field tests
- – Can not be combined with low cost wells and pump if aquifers are over 35 meters deep
- – Does not function in soils with very thick clays/ silty clays
- – Volume of infiltrated water that flows into the well cannot be predicted
- Via a sand filter water is injected in the ground (Not into the aquifer)
- Eventually water will seep into the aquifer.
- Cost : 5 – 15 US$ (Cost of materials for a Tube recharge. Labour done by family)
- Producers: Info at all SMART Centre.