Essay On Water Pollution
Water Pollution
Bangalore Lakes
Introduction
In the last few years the water conditions in Karnataka have steadily worsened. This has resulted in high to extremely high water stress in Karnataka. This is especially evident in the capital city of Karnataka: Bangalore. Bangalore was earlier known as ‘The City of Lakes’. Kempegowda, the founder of Bangalore, who had great foresight, established several tanks and lakes to collect runoff water, so that it could be utilized for better purposes and enhanced the beauty of our garden city. The farsighted founder dotted the city with numerous lakes/tanks in and around the city to ensure, that its citizens would always have abundance of water to drink, irrigate their lands and use for secondary purposes.
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The dumping of soil around or into the lake is a major concern. These lake, which are natural wetlands are now drasticaly reduced. Did you know, that if only clean water was pumped into Varthur Lake, in about 3 months, it would become clean. The lake has the ability to clean itself. The enchroachment of these lakes has reduced the area, and thus also the lake’s ability to clean itself. It is a well known fact that flowing water natuallay cleans itself. One hears of floods in the Koramangala/Indranagar region. What most perople fail to realise is that we our losing our natural water sinks. The lakes used to hold rain water, but thanks to encroachments, we have replaced the lake with concrete structres. We are destroying nature’s self-cleanign mechanism.
Nutrients
sThe increaed concentration of nutrients in a water body is known as eutrophication. Eutrophication results in a rapid increase in the growth of surface algae. This is known as an algal bloom. The increased concentration of algae drasticaly increases the biological oxygen demand (BOD). this results in an oxygen deficecy for other organisms living in the lake. The algae doent allow sunlight to reach the lake bed, and this inhibits the growth of auatic plants. The water then turns brown and murky. This is water of poor
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