10 easy tips to save water in your garden
April 20, 2012Huge Ground Water Reserves in Africa
April 23, 2012
Rainwater harvesting involves the direct collection of rainwater, which can be “recharged” into ground water either to increase the ground water level or by storing in underground rain water tanks.
Storing water underground in water tanks is not a new concept and has been carried out for hundreds of years with huge underground chambers. By using underground water tanks, you can maximise the working or living space available, rather than having a huge water tank sitting right on your property.
There are a number of reasons underground water tanks are becoming increasingly popular.
First of all, they are a very natural and easy way of increasing the ground water table level. They are also cost-effective when compared to other conventional water conservation methods such as water conveyance from dams and other resources. Once the underground water tank is installed, it costs nothing to collect as much rainwater as you want.
Rainwater collection can be carried out either on a small scale or at community level, thus, making a community self sufficient by fulfilling the household requirements of every family in a neighbourhood.
Storing water in underground water tanks can also prevent or reduce storm run-off, thus, averting floods, erosion, and environment damage to streams, while providing a backup water supply in exceedingly dry weather.
Underground water tanks can store a large amount of water for a long time. This water is collected during the wet rainy season and is used mainly for agricultural purposes, such as keeping your vegetable garden green and flourishing, and for household purposes such as washing the car.
- Excavating a hole for an underground water tank
The quality of water that is collected in underground water tanks is high and devoid of impurities, as rainwater is one of the purest natural resources. Hence, it can be used for both domestic and agricultural purposes. This is because dissolved chemicals, salt, minerals, or other heavy metals do not contaminate it, thus, it is a naturally soft water.
Such underground rainwater tanks come in different sizes and are made from various materials. Medium density polyethylene tanks are durable and are highly preferred as the material is watertight and durable. A water tank must be well insulated under the landscape to prevent it from collapsing. More importantly, a rigid top to prevent evaporation, mosquitoes from breeding, and to keep insects and tiny creatures from falling in is important. Proper cleaning should also be carried out to ensure that a water tank lasts for many years.
Source: National Poly Industries
Whether you decide on an underground tank or a conventional vertical water tank, it is usually advisable to buy a high quality plastic or poly tank as these combine affordability, ease of installation and longevity.
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