Page 58 - Social Science 2_flatten
P. 58

areas. Rainwater fills rivers, ponds and                Hand Pumps, Wells and Tube Wells

            lakes. Some of the rainwater evaporates                 You have read that rainwater also sinks
            and some of it seeps into the ground.                   into the ground. To get this underground

            Rivers                                                  water, we use hand pumps        , wells   and tube
                                                                    wells.
            We have many rivers in our country. Most
            of  them  originate  from  the  Himalayas.

            which get heavy rainfall. These rivers are
            also get fed in summer when the snow

            melts.






                                                                                       A hand pump
                                                                    Canals

                                                                    Canals  are  built  to  carry  riverwater  to
                                                                    distant places. Canals are used mainly for

                                                                    irrigation.
                                   A river

            Ponds and Lakes

            Rainwater  also  collects  in  ponds  and
            lakes.  Ponds  and  lakes  are  the  main

            sources of water for villagers.




                                                                                          A canal
                                                                    Dams

                                                                    Dams are built across big rivers to store and
                                                                    conserve water. The water stored in dams is

                                                                    used  to  produce  electricity.  This  type  of
                                   A lake                           electricity is called Hydroelectricity      .




              The oceans hold about 97 per cent of the
              world’s water.


            Man-made Sources

            We  also  get  water  from  man-made

            sources to fulfill our various needs.
                                                                                          A dam
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