Floodplains&levees<br />
What is floodplains?<br />
Defination of  a flood plain<br />Adjacent to a stream or a river that experience periodic flooding<br />A floodplain, is ...
How are Floodplains formed?<br />
A river may overflow its banks during times of heavy rain.<br />The river will deposit materials onto the flood plains whe...
Uses of floodplains<br />Floodplains may be used by humans for growing crops<br />As the silt deposited contains alluvium ...
What is levees?<br />
Definition of a levee<br />A levee, is a natural or artificial slope or wall to regulate water levels. It is usually earth...
How are levees formed?<br />
river overflows it’s banks<br />The  excess water overflows into the flood plain<br />When the water  recedes sediments ar...
Heavier and larger sediments deposited to form <br />the levee<br />
Artificial levees may be constructed to prevent coastal floods and river floods.<br />
Artificial levees may be  formed temporary by using  formed by using sandbags or permanent by earthworks<br />
Levees were first constructed in the Indus Valley Civilization (in Pakistan and North India from 2600 BC) <br />
credits<br />http://www.answers.com/topic/levee<br />http://en.wikipedia.org/wiki/Lev%C3%A9es<br />http://science.howstuff...
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Levees And Floodplains

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Levees And Floodplains

  1. 1. Floodplains&levees<br />
  2. 2. What is floodplains?<br />
  3. 3. Defination of a flood plain<br />Adjacent to a stream or a river that experience periodic flooding<br />A floodplain, is flat or nearly flat land<br />It includes the floodway, which consists of the stream channel<br />
  4. 4. How are Floodplains formed?<br />
  5. 5. A river may overflow its banks during times of heavy rain.<br />The river will deposit materials onto the flood plains when the water loses speed and recedes into the river.<br />The heavier and coarser sediments are first deposited at the river’s edge followed by the smaller and lighter materials deposited at the outer edge. <br />
  6. 6. Uses of floodplains<br />Floodplains may be used by humans for growing crops<br />As the silt deposited contains alluvium that is extremely fertile <br />
  7. 7. What is levees?<br />
  8. 8. Definition of a levee<br />A levee, is a natural or artificial slope or wall to regulate water levels. It is usually earthen and often parallel to the course of a river or the coast.<br />
  9. 9. How are levees formed?<br />
  10. 10. river overflows it’s banks<br />The excess water overflows into the flood plain<br />When the water recedes sediments are deposited<br />Smaller and lighter sediments are deposited further from the river <br />Larger sediments are deposited nearer to the river to form levees <br />
  11. 11. Heavier and larger sediments deposited to form <br />the levee<br />
  12. 12. Artificial levees may be constructed to prevent coastal floods and river floods.<br />
  13. 13. Artificial levees may be formed temporary by using formed by using sandbags or permanent by earthworks<br />
  14. 14. Levees were first constructed in the Indus Valley Civilization (in Pakistan and North India from 2600 BC) <br />
  15. 15. credits<br />http://www.answers.com/topic/levee<br />http://en.wikipedia.org/wiki/Lev%C3%A9es<br />http://science.howstuffworks.com/levee.htm<br />http://architecture.about.com/od/damsresevoirs/g/levee.htm<br />http://blog.nola.com/levees/2010/01/what_is_leveesorg.html<br />http://www.knowledgerush.com/kr/encyclopedia/Levee/<br />http://www.wisegeek.com/what-is-a-levee.htm<br />
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