Water Resources

• water cycle/hydrologic cycle

  • the continuous movement of water on, above, and below the surface of the earth
• evaporation

  • transformation of water from liquid to gas phases as it moves from the ground or bodies of water into the overlying atmosphere
• transpiration

  • release of water vapor from plants and soil into the air
• condensation

  • transformation of water vapor to liquid water droplets in the air, creating clouds and fog
• precipitation

  • condensed water vapor that falls to the earth's surface
• percolation

  • vertical movement of water thought the soil and rocks under the influence of gravity
• run-off

  • when water travels over the surface of the ground
• irrigation

  • to supply water to crops and such by pumping or diverting it from a river or other body of water
• ground water pumping

  • pumping underground water from wells
• how water moves

  • evaporation
  • transpiration
  • condensation
  • precipitation
  • percolation
  • run-off
  • irrigation
  • ground water pumping
• water resources

  • natural resources of water that are potentially useful
  • uses of water:
  • agricultural
  • industrial
  • household
  • recreational
  • environmental
• sources of freshwater

  • surface water
  • groundwater
• surface water

  • water that collects on the surface of the earth
  • replenished b precipitation
  • lost through discharge to oceans, evaporation, and groundwater recharge
• groundwater

  • fresh water located in the subsurface pore space of soils and rocks
  • water that is flowing within aquifers below the water table
• urban water cycle

  • much less infiltration
  • low groundwater flow
  • more run-off