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Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
Water resources
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Water resources

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I Spell SSt inservice course KVGN

I Spell SSt inservice course KVGN

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  • 1. RAJANI KRIISHNAN TGT SST
  • 2. RAJANI KRIISHNAN TGT SST
  • 3. Water can give life and take life as well * Uses of water * Destruction Due * *  Domestic purposes – *  Floods * cocking,  Tsunami * drinking, bathing, washing, *  Cyclones *  Hurricanes cleaning etc. * *  Irrigation purposes *  Industrial Purposes * *  Transportation Purposes *  Hydro Electricity * * * * * RAJANI KRIISHNAN TGT SST * to Water
  • 4. Sources Of Fresh Water Glaciers Ground water Precipitation – Rain & snow Surface seen off – rivers, lakes, ponds RAJANI KRIISHNAN TGT SST
  • 5. Water scarcity RAJANI KRIISHNAN TGT SST
  • 6. “Water Scarcity Of Water water every where not a drop to drink” RAJANI KRIISHNAN TGT SST
  • 7. What is a dam? A dam is a barrier across flowing river or water that obstructs or directs the flow, often creating a reservoir, lake or impoundment. “dam” refers to the reservoir rather than the structure Multipurpose River Projects Dams are now refered to as multipurpose projects because they serve many purpose. RAJANI KRIISHNAN TGT SST
  • 8. Advantages of Multipurpose dams To control floods To generate hydroelectricity For irrigation Inland Navigation Recreation and tourism Fish breeding Protecting the flora and fauna. RAJANI KRIISHNAN TGT SST
  • 9. Disadvantages of Multipurpose Dams • Regulating and damming of rivers affect their natural flow causing poor sediment flow and excessive sedimentation at the bottom of the reservoir, resulting in rockier streams beds and poorer habitats for the river’s aquatic life. • Dams also fragment rivers making it difficult for the aquatic fauna to migrate especially for spawning. • The reservoirs that are created on the RAJANI KRIISHNAN TGT SST
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  • 12. A protest message against Tehri dam, which was steered by Sundarlal Bahuguna for years. It says "We don't want the dam. The dam is the mountain's destruction." RAJANI KRIISHNAN TGT SST
  • 13. • Multipurpose projects and large dams have also been the cause of many new social movements like “Narmada Bachao Andolan”, “Tehri Dam Andolan” etc. • Resistance to these projects has primarily been due to the large scale displacement of local communities. • The dams also create conflict between people wanting different uses and benefits from the same water resource. Inter state water disputes are also becoming common with regard to sharing the costs and benefits of the multi-purpose. • It was also observed that the multipurpose projects induced earthquakes, caused water borne diseases and pest and pollution resulting from excessive use of water. RAJANI KRIISHNAN TGT SST
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  • 16. What is Rain water harvesting ? It is a technique of increasing the recharge of ground water by capturing and storing rainwater by constructing structures such as percolation pits, check dams, dug wells etc. Objectives of rainwater harvesting • To meet the increasing demand for water. • To reduce run off. • To avoid flooding of roads. • To augment the ground water storage and raise the water table. • To improve the quality of ground water. • To supplement domestic water requirements during summer long dry spells. RAJANI KRIISHNAN TGT SST
  • 17. RAJANI KRIISHNAN TGT SST
  • 18. • From ancient times sophisticated hydraulic structures have been built like - - During Chandragupta Maurya’s time dams & irrigation systems were extensively built – In the 14th century, the tank in Hauz Khas, Delhi was constructed by Iltutmish for supplying water. – In the 11th century, Bhopal lake, one of the largest artificial lakes of its time was built. – Evidences of irrigation works have also been found in Kalinga ( Orissa ), Nagarjunakonda ( A.P ), Bennur ( Karnataka), Kolhapur RAJANI KRIISHNAN TGT SST
  • 19.       Rain water harvesting In the hilly and mountainous regions, people built diversion channels like the ‘guls’ or ‘kuls’ of the western Himalayas for agriculture. Roof top rain water harvesting was commonly practiced to store drinking water, particularly in Rajasthan. In the flood plains of Bengal people developed inundation channels to irrigate their fields. In arid and semi arid regions, agricultural fields were converted into rain fed storage structures that allowed the water to stand and moisten the soil like the ‘Khadins’ in Jaisalmer and ‘johads’ in other parts of Rajasthan. In Rajasthan, particularly in Bikaner, Phalodi and Barmer almost all the houses traditionally had underground tanks or ‘tankas’ for storing drinking water. In Gendathur a remote backward village in Mysore, villagers have installed in their house holds roof top, rain water harvesting system to meet their water needs. RAJANI KRIISHNAN TGT SST
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