CBSE Notes – Social Science- Geography- DAMS- CLass 10

Posted: August 15, 2008 in Geography, Social Science
Tags:

                      

What is a dam?

 

 

Dams are massive barriers built across rivers and streams to confine and utilize the flow of water. This barrier creates a lake, reservoir or an impoundment. Dams are used for human purposes such as irrigation and generation of hydroelectricity.

 

The first known dam was built in 2900 B.C. across the Nile River to protect the city of Memphis from flooding. Dam build was continued into the time of the Roman Empire, after which dam construction was literally lost until the 1800s. Dams are a structure also seen in nature – beavers build dams to keep the water deep enough to cover the openings to their homes, protecting them from predators. 

 

Jawaharlal Nehru declared dams as the “Temples of modern India”. Some of the important Indian dams are –  

Bhakra Nangal Dam

 

 

 

Reasons to build a dam:

 

 

*    Generation of hydroelectricity

 

*    Irrigation. These are often diversion dams, which stop a river’s natural course so that water can be sent off to a different place.

 

*    Control flooding. These are called detention dams, which are constructed to either stop or slow the amount of water in a river.

                                                                                 

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Comments
  1. kangana says:

    inadequate but good collection of information

  2. ayesha says:

    its good ….
    but its juss a part of d chapter

  3. prepareforcbseexams says:

    Thanks Kangana and Ayesha….this is an important portion of this particular chapter. These extra notes will help to present your answer in a beautifyl manner and not regular, similar answer from book.
    Will be posting Question Bank and more extra notes soon.

  4. sudeshna says:

    i read it earlier but yea it is good n might prove 2 b helpful

  5. jayaprakash says:

    Good, but add more topics

  6. Arushi Singh says:

    These are good but very less. We not only want this but more. So please advice us wher to go?

    • jaya says:

      not too gud .. i hav expct much more than this .. so i can only say .. keep it up

      • priyanka says:

        not too gud .. i hav expct much more than this .. so i can only say .. keep it up

      • jaya says:

        heyyyyyy .. why r u coping me .. copy cat ..

      • priyanka says:

        maine tumhe copy nhi kiya .. tum hogi copy cat .. mai nhi .. maine apna cmmnt likha hai or tumne apna .. ab dono agr same ho gya to iska mtlb kya maine tumhe copy kiya hai ..

      • jaya says:

        yesssss .. its meaning can be the same .. or chlo maan lete hai bychance wrds bhi same ho gye … lekin saare nhi ho skte or vo bhi spelling bhi .. blkul ek jaisi .. stupid .. khud to hai hi doosro ko bhi smjha hai kya ..

  7. arushi says:

    excellent notes keep it up

  8. arushi says:

    great good jog thankful 2 u

  9. arushi says:

    great good job
    thankful 2 u

  10. krishna says:

    tis site has gvn me ansers of only very lil portions buttos 2 r very short

  11. mithun says:

    it is not so bad.we students need notes of all subjects and possible questions.thank u 4 publishing this.

  12. karthik says:

    it is not to my level of
    expectation

  13. GANGA sharma says:

    add more question the paper was not so good

  14. Shah Rukh Khan says:

    good keep it up

  15. Akash Sharma says:

    please can u give the notes of full chater

  16. Shradha says:

    da note is very nice andd i like it!!!!!!!but can i hab other notes??? i.e..climate and climatic zone!!!!!!!!

  17. eeeeeeeeeeeeeeeeeeeeee says:

    bakwas

  18. eeeeeeeeeeeeeeeeeeeeee says:

    horible

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