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Natural ground catchment and Open water reservoir

67 bytes added, 16:45, 6 April 2012

→‎Suitable conditions

- Even if using a pond for direct water use, ponds nevertheless recharge into surrounding ground and can recharge wells around the pond so there is continued water after pond dries up. <br>

| con= - Silt up very easily due to lost vegetation cover in catchment area, leading to soil erosion under intense rainfall and high run-off volumes. De-silting takes time and money. <br>

- Relatively small water quantities can Maintaining dams requires communal effort and communal institutions might not be harvested strong enough <br>- Polypropylene mesh is hard to find High combination of evaporation and seepage rates means that water in ponds does not last very long, e.g. 4-6 months in some areas India. <br>- Effects of storm damage due to site and fragility of nets if maintenance is not performed Vectors can breed in open water <br>- Vandalism Microbiological and lack of maintenance – due chemical water quality is likely to the distance between structures and a population not be acceptable for direct consumption <br>

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