How to deplete cities of fresh water and pollute it too– A Case Study Of Jaipur
The lake at Nainital, a town in the Himalayas W ith a rising population on our planet, particularly in cities, ensuring fresh water supplies of a good quality is an issue facing many cities around the world. Cities derive their water from surface sources such as lakes and rivers or from underground sources. It seems that in India two thirds of fresh water requirements are met by ground water. With an increase in human activity both sources of water are getting depleted besides getting polluted. Surface water is polluted if waste water from cities and industries is dumped directly into natural lakes and rivers without treatment. Such pollution can be reduced if water is first directed/dumped into artificial canals and lakes instead. From here it purifies slowly by bacterial action and the water that seeps into ground is purified by filtration through soil. However some pollutants such as nitrates from fertilizers that dissolve in water can reach ground reservoirs polluting