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ONE PLANET …                                                                                                                                                ONE WATER CYCLE …
                                                                                                                                                                                          Water is present everywhere on earth and is indispensable for life.
       Astronauts who have been lucky enough to observe our planet from space come back fascinated by its
                                                                                                                                                                  The quantity of water has remained unchanged for 4.4 billion years, and is distributed between four major sources :
       incredible beauty and its amazing blue colour. This colour, which has earned Earth its nickname of the
                                                                                                                                                                                               oceans, coastal waters, the atmosphere and biosphere.
                     “blue planet”, is partly linked to the vast expanses of water that cover it.



                                                                                                                                                                                                                                                         On average a molecule of water
                                                                                                                                                                                                                                                         remains in the atmosphere for 8 days
                                                                                                                                                                                                                         Atmosphere
                                                                                                                                                                                       Precipitation                                                     before falling back to the ground.
                                                                                                                                                                                                                           0,001 %
                                                                                          billion
                                                                                                                                                                                                                                                      Condensation
                                                                                                                                                                       Storage
                                                                                                  The volume of water on Earth amounts to
                                                                                                  1.385 billion km3. If it were to be spread                       in depressions
                                                                                                  out evenly over the surface of the globe, it
                                                                                                                                                                (lakes, ponds, etc.)
                                                                                                  would form a layer 2.7 km thick.

                                                                                                                                                     Run-off

                             The oceans cover 71% of
                             the Earth’s surface. It’s the
                                                                                                                                                                                                                                                       A molecule of water remains for a few
                             blue planet.
                                                                                                                                                                                                                                                       hours only in the cell of a plant or ani-
                                                                                                                                                                                                                                                       mal.

                                                                                                                                                                                                                                                                                                                      Evaporation
                                                                                                                                                     Plants and animals
                                                                                                                                                         0,0001 %

                                                                                                                                                                                       Large and small rivers
                                                                                                            Salt water accounts for 97.2%
                                                                                                                                                                                             0,0001 %
                                                                                                            of water on Earth, with fresh                        In soils
                                                                                                                                                                                                                 Lakes
                                                                                                            water only accounting for 2.8%                      0,005 %
                                                                                                                                                                                                                0,01 %
                                                             Water is an asset that is poorly
                                                             shared out on Earth. 40% of the
                                                             world’s population lack water.


                                                                                                                 The water available to
                                                                                                                                                 Infiltration
                                                                                                                 mankind on Earth repre-
                                                                                                                                                                                                                    On average a drop of
                                                                                                                 sents less than 1% of the
                                                                                                                                                                                                                    water remains in a        Oceans
                                                                                                                 total volume.
                                                                                                                                                                                                                    river for 2 weeks
                  65% of an adult human’s body                                                                                                                                                                                                97,2 %
                                                                                                                                                                                                                    and in a lake for 17
                  is made up of water.
                                                                                                                                                                                                                    years.
                                                                                                                                                                                                                                                                    Glaciers and polar ice caps
                                                                                                                                                                                                                                                                               2,2 %
                                                                                                                                                         Subterranean water




                                                                                                                                                                                                                                                                                                                                                                     Renauld
                                                                                                                                                              sources
                                                                                                                                                               0,6 %
                                                                                                                                                                                                                                                                                      In the glaciers and polar ice caps, water
                                                                        One kilogram of sea
                                                                                                                                                                                                                              On average a drop of water remains                      is sometimes stored for up to 10,000 years.
                                                                        water contains on
                                                                                                                                                                                                                               in the seas and oceans for 2,500
                                                                        average 34.4 g of salt.
                                                                                                                                                                                                                              years.
                                                                                                                                                                                 Underground discharge




… AND MANY
                                                                                                                                                                                                                                                                                                                         Key
                                                                                                                                                                                                                                                                                          Bacteriological pollution      Waste pollution
                                                                                                                                                                                                                                                                                                                                                       Nitrate and phosphate pollution
                                                                                                                                                                                                                                                                                          Hydrocarbon pollution          Physical-chemical pollution




  TYPES OF
 POLLUTION!
 Water is the preferred vehicle for all types of
 pollution. Watercourses, rivers, then streams
sweep the poison along for miles before pouring
             it out into the ocean.

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Water cycle - Surfrider

  • 1. ONE PLANET … ONE WATER CYCLE … Water is present everywhere on earth and is indispensable for life. Astronauts who have been lucky enough to observe our planet from space come back fascinated by its The quantity of water has remained unchanged for 4.4 billion years, and is distributed between four major sources : incredible beauty and its amazing blue colour. This colour, which has earned Earth its nickname of the oceans, coastal waters, the atmosphere and biosphere. “blue planet”, is partly linked to the vast expanses of water that cover it. On average a molecule of water remains in the atmosphere for 8 days Atmosphere Precipitation before falling back to the ground. 0,001 % billion Condensation Storage The volume of water on Earth amounts to 1.385 billion km3. If it were to be spread in depressions out evenly over the surface of the globe, it (lakes, ponds, etc.) would form a layer 2.7 km thick. Run-off The oceans cover 71% of the Earth’s surface. It’s the A molecule of water remains for a few blue planet. hours only in the cell of a plant or ani- mal. Evaporation Plants and animals 0,0001 % Large and small rivers Salt water accounts for 97.2% 0,0001 % of water on Earth, with fresh In soils Lakes water only accounting for 2.8% 0,005 % 0,01 % Water is an asset that is poorly shared out on Earth. 40% of the world’s population lack water. The water available to Infiltration mankind on Earth repre- On average a drop of sents less than 1% of the water remains in a Oceans total volume. river for 2 weeks 65% of an adult human’s body 97,2 % and in a lake for 17 is made up of water. years. Glaciers and polar ice caps 2,2 % Subterranean water Renauld sources 0,6 % In the glaciers and polar ice caps, water One kilogram of sea On average a drop of water remains is sometimes stored for up to 10,000 years. water contains on in the seas and oceans for 2,500 average 34.4 g of salt. years. Underground discharge … AND MANY Key Bacteriological pollution Waste pollution Nitrate and phosphate pollution Hydrocarbon pollution Physical-chemical pollution TYPES OF POLLUTION! Water is the preferred vehicle for all types of pollution. Watercourses, rivers, then streams sweep the poison along for miles before pouring it out into the ocean.