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Unit 1 The Hydrologic Cycle

Unit 1 The Hydrologic Cycle

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Unit 1 The Hydrologic Cycle

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  1. Unit 1 The Hydrologic Cycle Prepared and Presented by: Nelsa English Course: Water Resources: Conservation and Management (ENVS 4114)

  2. Importance of Water • “Water is Life” • All living things depend on Fresh Water • Salt content < 1% or 1000ppm • Blue and Green water • In Humans water composes • 69% of the human body • 85% of the brain • 35% of bones • 83% of blood • 90% of liver

  3. Importance of Water Contd. • Function of water in the human body • aiding in digestion and absorption of food • regulates body temperature and blood circulation • carries nutrients and oxygen to cells • removes toxins and other wastes • cushions joints and protects tissues and organs, including the spinal cord, from shock and damage

  4. Importance of Water Contd. • Function of Water in Plants • Plants consist of 85-98% water • Growth • Production of sugars • Fills new plant cells • Turgidity • Acts as a transport mechanism • Cooling via transpiration

  5. Importance of Water Contd. • 4 Main Function of water • Health • Habitat • Carrier • Production • Biomass production • Societal production

  6. Earth’s Water Distribution

  7. Earth’s Water Distribution

  8. The Final Picture

  9. Hydrologic Cycle • Water exists in varying forms • Constantly changing state • Never changing volume • Movement of water through phases- Hydrologic/Water Cycle

  10. Components of Water Cycle • Evaporation Change in energy state • conversion of water from a liquid into a gas • Transpiration • Humidity • Relative Humidity

  11. Components of the Water Cycle • Condensation • Lower energy state • Cooling of water vapour • Formation of clouds, fog, or dew • What is formed depends on where the water vapour cools

  12. Components of the Water Cycle • Precipitation • Return of water to earth’s surface • Intensified condensation • Cold Fronts • Forms of Precipitation • Rain (Primary form)

  13. Components of the Water Cycle • Water over and through the Ground • Infiltration • Capillary water • Gravitational water • Ground water • Runoff WATERSHED

  14. Questions to Ponder • What would happen to the planet if the hydrologic cycle stopped functioning? What would happen to societies as the supplies of water diminished? Would our planet die? • What would happen if the polar icecaps melted and the hydrologic cycle couldn't keep water levels stable? Where would we go as water levels rose out of control? • Could we ever use the ocean to supplement or water once freshwater disappears? What ways could the oceans be used to provide us with a source of water?