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Water Portal / Rainwater Harvesting / Surface water / Floating intake

602 bytes added, 18:17, 30 April 2012

→‎Suitable conditions

Generally developing intakes for ponds and lakes is expensive. The further away the users are from the source, the more expensive the system. Where possible, the source and intake should be located near the community. Especially in times of drought, a system far from the community that is piped to the community, could stop short of providing consistent water. In this case, make sure the dry and wet season volumes of water are known beforehand, so that water sources may be diversified in times of low to no water.

Whenever practicable a river intake should be sited where there is adequate flow; at a level that allows gravity supply to minimise pumping costs; upstream of densely populated and farming areas to reduce silt inflow; upstream of cattle watering places, washing places and sewer outlets (to eliminate pollution of the water); upstream of bridges (to reduce velocity/turbulence).

Intake designs aim to avoid clogging and scouring and to ensure the stability of the structure even under flood conditions. Where the river transports no boulders or rolling stones, an unprotected intake may be adequate.

==Construction, operations and maintenance==

Winona

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