Bangalore water supply resources_Schools India Water Portal_2011
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Bangalore faces increasing water shortages as its population grows rapidly. The city's water supply comes primarily from two sources - 21% from groundwater and 79% from surface water sources like the Cauvery River. However, nearly half of the city's water is lost due to leaky infrastructure. While the water board treats over 1 billion liters of water and sewage daily, the amounts of sewage generated and treated water available are both insufficient to meet current demand, leading to a deficit of over 600 million liters per day. Unless action is taken to conserve water resources through rainwater harvesting, reducing waste, and other measures, the water crisis in Bangalore is expected to worsen as the population continues to rise.
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Bangalore water supply resources_Schools India Water Portal_2011
- 3. Source: http://www.flickr.com/photos/jpjoshi/4616108862/ We see enough of this too
- 4. Is there a water problem in the city?
- 6. 1991 4.5 million 2001 5.76 million 2011 7.9 million 8 million by 2011 Source: Dept of Economics and Statistics, Govt of Karnataka; statistics for Bangalore Urban district
- 7. Is what we consume 21% met by groundwater (250 MLD) 79% met by surface water (900 MLD) Losses = 43% 400 million litres /day 5 functional water treatment plants 4 Cauvery, 1 TG Halli (Arkavathy) 1150 million litres per day
- 10. Sewage 920 MLD generated No. of working STPs (sewage treatment plants) 12 secondary treatment plants + 4 tertiary treatment plants 720 MLD treated
- 11. Where does the treated and untreated sewage go? To the Vrishabhavati and Ponniyar basins. Downstream of Bangalore, these would be freshwater sources
- 12. Water from the Vrishabhavati and Ponniyar basins are also used for agriculture, downstream of Bangalore Where does the treated and untreated sewage go?
- 14. and climbs a fair amount too Our water travels a long distance
- 15. Energy Three stages of pumping Cost of getting us the water = Rs 18/kl Domestic customers pay = Rs 6 - 36/kl
- 16. Has this been the case from ages?
- 17. A city of tanks and lakes We were
- 19. A city of bus stands, bazaars, stadiums Dharmambudi tank Challaghatta tank Koramangala tank Sampangi tank Siddikatte lake Karanji tank Chennamma tank Kempambudhi tank Akkithimmanahalli tank Miller tank we are
- 20. Dharmambudi tank - Majestic Bus depot Challaghatta tank - KGA Golf course Koramangala Tank - National Games village Sampangi tank - Kanteerava stadium Siddikatte lake - City market Karanji tank - Gandhi bazaar area Chennamma tank - a burial ground Kempambudhi - a sewerage collection tank Akkithimmanahalli tank - Hockey Stadium Miller Tank - Guru Nanak Bhavan, schools, and several buildings.
- 23. Impacts
- 24. Unequal distribution Ill health Cholera Typhoid Jaundice Dengue Dysentery
- 25. Periodic flooding in low-lying areas that have been built on earlier tank-beds
- 26. Water disputes
- 28. India – status and projections 1 / 6 of World’s Population 1 / 25 of world’s Freshwater Resources Source: TERI
- 29. Mismatch between regions of large population and available freshwater resources Global Fresh Water Stress By 2025 2 / 3 of the world’s population estimated to be underwater-stress conditions. 3 billion people may be affected by water scarcity . Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/21.htm#21b
Editor's Notes
- 840 mld supplied from Cauvery, 60 MLD from Arkavathy (TG Halli) 25% physical losses due to pipeline leakage, 18% commercial losses – unmetered water / tampered meters 500 mld – last phase under execution. Will be available after 2 -3 years
- The city has 12 Secondary treatment plants and 4 Recycling (Tertiary treatment) plants Treatment plants at Yelahanka, Vrishabhavati, Cubbon park and Kempambudhi and Lalbagh are tertiary treatment plants The secondary treatment plants are at: 1. Vrishabhavathi 2. K & C 3. Hebbal, 4. Kempambudhi 5. Madiwala 6. K & C 7. Kadabeesanahalli 8. K.R. Puram 9. Rajacanal 10. Jakkur 11. Mylasandra 12. Nagasandra
- both treated and untreated sewage go to the Vrishabhavathi basin (Arkavathi basin joining the Cauvery basin via Vrishabhavathi) and on the other side the treated and untreated sewage goes to the Ponniyar basin
- Physical losses (actual losses) is through service mains, distribution mains and reservoirs
- Asia and the middle East have 60% of the world’s population and only 36% river runoff. South America on the other hand has 6% of the world’s population and 26% of river run-off. National data masks huge regional differences in many countries. The map shows a number of countries including Australia, USA, Brazil, China and others in some sort of comfort zone, but many areas in these countries are already water stressed. In parts of the United States, China and India , groundwater is being consumed faster than it is being replenished, and groundwater tables are steadily falling. Some rivers, such as the Colorado River in the western United States and the Yellow River in China, often run dry before they reach the sea.