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Subsurface harvesting systems

572 bytes added, 20:26, 7 April 2012
→‎Suitable conditions
- Subsurface dams are not likely to deteriorate, with little danger of breaching <br>
- Construction has long lifespan and require minimal maintenance <br>
- To some degree, subsurface water-harvesting systems improve water quality by filtering water as it moves to the drains<br>
| con=
- Leakage is often difficult to detect <br>
- Water losses may occur through cracks in the impermeable layer (it may be possible to drill a well in the fracture zone and utilize the dam as an artificial recharge structure)<br>- Downwater flow will be impacted to communities downstream<br>- The dam may become undermined or eroded owing to faulty design or construction, such as when boulders are not used in the building of the dam<br>- the river may change course<br>- the possible dam construction sites may be too far from the water users<br>
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