__NOTOC__
[[Image:Wire-cement_tank_icon.png|right]]
[[Image:Wire-cement_tank.PNG|thumb|right|250px|Construction of a large storage tank with concrete blocks, Tanzania (photo: Simavi) ]]
Nowadays, most storage tanks have a cylindrical shape, which is much stronger [[Rainwater harvesting]] can be an effective and uses less material than square or rectangular tanks. In Nicaragua short "handslow-on" training courses teach users how cost alternative to make their own groundwater usage. The water collected during the wet season can be stored in cylindrical storage tank for irrigationtanks until it is needed in the dry season.
Bricks are used to make smaller tanks of 0.5-3 m3 and natural stones are used for tanks of 3 to 120 m3. The construction starts by laying 2 PVC tubes on the ground (for the outlet and drain). Then stones are placed in a circle and secured with steel wire. The inside and outside of the tank is then plastered with cement. No steel bars are needed since the wire functions as reinforcement. Leaks are repaired with cement.
[[Image:Wire==Suitable conditions==Rainwater harvesting requires at least an annual rainfall of 100-cement_tank200 mm.PNG|thumb|right|150px|Filling Depending on the size of the storage tank; the wire-cement tank has a tank capacity of 1 0.5 m3 - 120 m3 made of bricks, wire and cement ]].
{{procontable | borderpro="1" cellpadding="5" cellspacing="0" align="center"|-! width="50%" style="background:#efefef;" | Advantages! style="background:#ffdead;" | Disadvantages|-| valign="top" | Easy to construct and repair.<br>Uses less - Less material needed than square or rectangular tanks.<br>| valigncon="top" | <br>|}}
==Construction, operations and maintenance==
Material needed for a tank of 1 m3:
* 120 construction bricks
* Sand
* 50 kg cement
* 1 kg of steel wire.
== Capacity Costs==
0,5 m3 ==Country experiences==In Nicaragua short "hands- 120 m3on" training courses teach users how to make their own storage tank for irrigation.
== Costs == Material for a tank of 1 m3: 120 construction bricksReference manuals, sandvideos, 50 kg cement and 1 kg of steel wire. == Applying conditions == == External links ==Information: Water storage, Rainwater harvesting.
* General [http://www.unep.org www.unep.org ] [http://www.rainfoundation.org www.rainfoundation.org ] [http://www.hrwallingford.co.uk www.hrwallingford.co.uk ] [http://www.rainwaterharvesting.org www.rainwaterharvesting.org ]
* Austra-Nica tanks [http://www.ropepumps.org www.ropepumps.org ] [http://www.practicafoundation.nl www.practicafoundation.nl ]
==Acknowledgements==