SHEENA (Water resources)CLASS 10 .pptx

WATER RESOUCRES PPT CLASS 01 GEOGRAPHY

1. Water resources

2. Uses of water Drinking Washing Cooking Bathing Irrigation etc ….

3. Water as a renewable resource Only 1% of fresh water we have is renewed by hydrological cycle

4. If water is an renewable rsource the questions should be Why we talk about water scarcity? What is the need to conserve water? Why water management is important? This Photo by Unknown Author is licensed under CC BY

5. Reasons of water scarcity

6. Uneven distribution of water

7. Growth of population For domestic use Production of food Other purposes

8. Commercialisation of agriculture Expansion of irrigated areas and dry season agriculture Construction of tubewells by farmers This Photo by Unknown Author is licensed under CC BY-SA-NC

9. Iindustrialisation and urbanisation Hydroelectric power to industries discharge of industrial . waste This Photo by Unknown Author is licensed under CC BY-NC-ND This Photo by Unknown Author is licensed under CC BY-SA

10. Need to conserve and manage water resources But how to do it? This Photo by Unknown Author is licensed under CC BY-NC

11. Archeological and historical records Water management and conservation has been started since from ancient time During the time canals and dams were also constructed

12. Hydraulic structure in ancient india In the first century b.c at siringaverapur water harvesting system was exsisting using the flood water from ganga river During the time of Chandragupta Maurya , dams lake etc. were built Irrigation system was founded in kalinga , nagarjunakonda,bennur and kohlapur In 11 th century , Bhopal lake was built In 14 th century,lltush constructed a tank at hauskhas ( delhi )

13. Water harvesting in ancient india

14. Continuation of traditional way in modern india by building damns in the most of the river basin

15. Dams or multi-purpose projects Tradittionally built to impund water and rain and harvest that could use later to irrigate agricultural fields At present , dmas are built for multi-purpose usage therefore it is also know as multi-purpose project

16. What is a dam? It is a barrier across flowing water that obstructs , directs the flow,often creating a reservoir, lake or impoundment

17. Classification of dams: Dams are classified according according to structure, intended purpose or height. Based on structure and material used According to the height , dams can be categorized as large dams and major dams or alternatively as low dams, mediums height dams and high dams

18. Uses of multipurpose project/dam Electricity generation Flood control Water supply Irrigation Help to promote tourism After india’s independence , dam is considered as one which lead the nation to development and progrsss

19. Some dams of india The bhakra-nangal project on sutluj basin uses both of hydel power production and irrigation The hirakud project on Mahanadi basin integrates conservation of water with flood control

20. Drawbacks of dams

21. Dams also fragment rivers making difficult for aquatic fauns to migrate, especially for spawing Degredation of forest and soils due to submergre during flood Irrigation pattern have changed . Cropping patterns has changed from subsistence farming to intensive farming which ha resulted in ecologicak imbalance and slination of the soil dams have of the soil It also causes earthquakes and water born diseases

22. 6. Dams created conflicts among the people who want different uses of the water available from the projects Two examples are: Narmada bachao andolan Tehri dam andolan

23. Water harvesting Another way to manage water is to harvest Rain water Ground water River water Flood water

24. Rainwater harvesting Rainwater harvesting is the accumulation and storage of rainwater for reuse on-site , rather that allowing it to runoff rainwater harvesting techniques are more environmental friendly as compared to multipurpose river project

25. Water harvest method In hills and mountainous regions , people built diversion channels like the ‘guls’ or ‘ kuls ’ of the western hiamlya for agriculture In the flood plain Bengal, people buid inundation channels to irrigate their fields Rooftop rainwater harvesting was commonly practicised to store drinking water particularly to store drinking water was particularly in rajasthan

26. Palar parli The rainwater which is stored in underground tanks is portable . It is reliable source of drinking water It is the mainsource of water when all the other sources have dried up It is considered the purest form of drinking water

27. Tanks or tankas of rajasthan it is the main source of drinking water Clean up before monsoon Protect it from pollution

28. Bamboo drip irrigation system In meghalya a 200-yearold system pf tapping stream and spring water by using bamboo pipes is prevalent About 18-20 litres of water transported over hundreds of meters

29. Advantages of bamboo irrigation system Increase in crop yield with less water Makes use of the natural and local material Does not need fuel or power Maintain sustainable irrigation system Soil erosion is controlled Saves water by allowing it to drip slowly directly to the base of the plant

30. Interesting fact Tamil nadu is the first state in india which has made roof top rainwater harvesting structure compulsory to all the houses across the state there are legal provisions to punish the defaulters

31. FIN MADE BY:JAGRITI CLASS 10 TH A ROLL NO. 25