Hydrological Cycle (Water Cycle)

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The hydrological cycle is the system which describes the distribution and movement of water between the earth and its atmosphere. The model involves the continual circulation of water between the oceans, the atmosphere, vegetation and land.

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Hydrological Cycle (Water Cycle)

  1. 1. The Hydrological Cycle ( The Water Cycle ) aqf
  2. 2. The hydrological cycle is the system which describes the distribution and movement of water between the earth and its atmosphere. The model involves the continual circulation of water between the oceans, the atmosphere, vegetation and land. The water cycle is driven by energy from the sun.
  3. 3. The water cycle has four stages: storage, evaporation, precipitation, and run-off.
  4. 4. Describing the Cycle: Solar energy powers the cycle. Heat energy from the sun causes evaporation from water surfaces (rivers, lakes and oceans) and….
  5. 5. …transpiration is essentially evaporation of water from plant leaves. ( In other words, it’s like plants sweating.)
  6. 6. The warm, moist air (containing water vapour) rises and, as it cools, this process is called condensation. When a large amount of water vapor condenses, it results in the formation of clouds.
  7. 7. Wind energy; ‘advection’ may move clouds over land surfaces where … …precipitation occurs, when the water in the clouds gets too heavy, the water falls back to the earth -- either as rain or snow depending on altitude.
  8. 8. The rainwater flows, either over the ground ( run off ) into rivers and back to the ocean, or… … infiltrates downwards through the soil rocks where it is returned to the oceans through groundwater flow.
  9. 9. The Water Cycle Balanced Usually the water cycle is in balance, and the amount of precipitation falling will slowly soak into the ground and eventually reach the rivers. However, if rain falls for a long period of time or if the ground is already soaked or saturated with water then the chance of flooding is increased.
  10. 10.  The hydrological cycle is a good example of a closed system: the total amount of water is the same, with virtually no water added to or lost from the cycle.  Water just moves from one storage type to another.  Water evaporating from the oceans is balanced by water being returned through precipitation and surface run off.
  11. 11. END. yanfalsario

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