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Water Portal / Rainwater Harvesting / Surface water / Catchment and storage dams

2 bytes added, 18:21, 17 April 2012

→‎Operations & Maintenance

* With preventive methods to reduce turbidity (silt trap, extraction method) the water is still turbid & contaminated and will require treatment. * For direct abstraction, promotion of household water treatment is advocated. Choice of household water treatment technology should be based on efficiency of removing contaminants present in the water. For open water that may be prone to cyanobacterial blooms, biosand filters are a good choice due to their ability to remove cyanobacterial toxins. Other technologies however may be more suitable for mobile communities (e.g. SODIS or ceramic filters, depending on turbidity levels). For reservoirs near urban environments or where the runoff area has intensive agriculture practised in its vicinity, diversification of water resources is a good idea to provide alternatives for direct drinking purposes. Strengthening controls and restrictions on use of illegal substances will also help.

====Operations & Maintenanceand maintenance====

In the operation of a dam, it is good to have a caretaker. Their activities can include opening or closing valves or sluices in the dam, or in conduits to the reservoir. Water collection is often provided from water points. The users themselves, often women and children, usually carry out collections.

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