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Water cycle


The Natural water cycle

Water circulates continuously in the atmosphere on the earth and under the earth, dragged into an endless cycle.


Under the effect of the sun's heat, the water in seas, rivers and lakes evaporates and becomes water vapor that forms clouds.


The clouds are pushed by the wind. Where they pass through cold regions, the water vapor condenses.


It falls to the ground in the form of rain, snow or hail. The water trickles settles on the ground or seeps into the subsoil.


It comes to swell the rivers, which in turn return to the sea and the cycle repeats. This is the water cycle.



The domestic water cycle

From Source to Tap

  • The water is drawn from natural resources such as: springs, rivers, streams, lakes, and groundwater. A pump is installed to suck the water out and is then piped to a drinking water production plant.
  • In the plant, the water undergoes treatments to get rid of impurities. The treatment used is adapted to the quality of the resource. Some groundwater, well protected from pollution, requires simple disinfection.
  • Once the treatments carried out, the water is drinkable.
  • When leaving the plant, the water is analyzed and controlled. It is then stored in water towers, and then transported through a network of pipes into homes.
  • Finally, the result is the collection, transport and treatment of wastewater.


4 steps Summary


Schematic view of the water treatment