PLASTIC CASING AND SCREENS
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WHY SHOULD WE USE PLASTIC CASING AND SCREENS

India will be one of the 48 countries in the world, where one in three persons will face   shortage of water by the year 2025, warms the study by the John Hopkins University School of Public Health.

Estimates place the average annual water availability at 1869 BCM out of which the utilizable ground water resources are estimated at 452 BMC. This year our total requirement for utilizable water will be 750 BCM and in the year 2025 it would be 1050 BCM. However, estimates of availability depends on a lot of investment in the development and conservation of water resources.

One of the earth's most important sources of water is groundwater. It provides almost a third of all freshwater on earth. It is threatened by pollution, mismanagement, over exploitation and population. It is more difficult and very expensive to extract ground water.

Excessive withdrawal of ground water. pollution or mismanagement can deprive our future generation from using that  source. It can cause drying out of well and land subsidence.

Deep ground-water is relatively free from pollution in many places and is excellent for drinking. domestic use and industrial purpose. But once the aquifer is contaminated, remedial measures can be long-time and costly, even impossible. The slow penetration of pollutants can be called a ' CHEMICAL BOMB'. It threatens our future generations.

Because ground water is invisible, the dangers to it are often mishandled or totally disregarded. Another danger is of saltwater intrusion i.e. the displacement of fresh water in coastal aquifers by sea water.

Ground water tapping techniques have undergone a sea of  changes in the last 30 years. New materials for casing the tube-well have been in use replacing the conventional steel casing. Use of steel casing and screen are becoming obsolete world-over. Acceptance of thermo - plastic casing and screens is increasing day by day in developed and developing countries alike.