Sources of Water 
(i)    Rivers and springs : Most of the water which human beings use for drinking, washing and farming comes from rivers and springs. The river flows down the mountain side and across the land, finally flowing into a sea or an ocean.
(ii)    Oceans and seas: Most of the water on the earth is found in the oceans and seas. However, the water found in the oceans and seas is not fit for drinking or agricultural purposes as it contains large amount of salt. However, ocean acts as a habitat for large number of plants and animals.
 (iii)    Snow : Some regions of the earth are covered with snow especially during winters. Water formed by melting of snow is another source of water. This snow melts slowly. Sometimes this water flows down in the form of streams and rivers. Streams and rivers are another sources of water.
(iv)    Groundwater : The ground water is actually rainwater which mainly comes from seepage of water accumulated under the ground. Figure shows the accumulation of groundwater.

(v)    Water table: If you take soil from ground, it has air as well as water. As you go down, the amount of water increases and air decreases. A level below surface, where it is only water is called the water table.
(vi)    Lakes and ponds: These are small reservoirs of water. These are created by collection of rainwater in low lying areas. Seepage from the groundwater reserves also adds to the water in lakes and ponds.
(vii)    Rain: The rain is a very important source of water for us. All resources of water are fed mainly by rains.

 

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 Back to the Oceans

Out of 71% of the water on earth, 97% is the water from oceans and seas. Water from oceans and seas contains dissolved salts in it, hence this water is called saltwater or saline water.

  • Rainwater falls into rivers, lakes etc.
  • The rain droplets fall into oceans, rivers, ponds, seas.
  • Water from the rivers, lakes, ponds finally flows into the sea and ocean.

Groundwater: The groundwater is rainwater which mainly comes from seepage of water, accumulated under the ground

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