Rivers, climate and vegetation2 5th grade


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Rivers, climate and vegetation2 5th grade

  1. 1. Rivers, climate and vegetation 5th grade BY PATRICIA VELASCO RICO
  2. 2. What is a river?  Rivers are moving bodies of water. River Thames
  3. 3. Where does a river originate?  A river originates in the mountains, and flows into a sea, a lake or another river.
  4. 4. The river originates in the mountains The river flows into a sea, a lake or another river
  5. 5.  For example… A river that flows into an ocean: River Tajo
  6. 6.  For example A river that flows into another river: Guadarrama river flows into Tajo River.
  7. 7.  For example A river that flows into a lake: River Ter (Gerona) flows into Lago de Bañolas
  8. 8. Elements of a river - The course  We can Distinguish 3 - The flow elements in a river - The flow regime
  9. 9. What is the course of a river?  The course of a river is the route which a river takes from its source to the mouth.This is the source of the river This is the mouth of the river This is the COURSE of the river
  10. 10.  There are 3 courses: Upper course Middle course Lower course
  11. 11. Upper course  It is near the source. Here, the river is narrow. The river bed is steep, so the water moves fast
  12. 12. Middle course  Here, the river is wider. The river bed is flatter, so the water flows slowly.
  13. 13.  In the middle course, the river forms curves. These curves are called meanderings. This is a meandering
  14. 14. Lower course  It is near the mouth of the river. The river is wide here. The river bed is very flat, so the water moves very slowly.
  15. 15. What is the flow of a river?  It is the amount of water that a river carries. The more precipitacion there is, the greater the flow will be
  16. 16. What is flow regime?  It is the flow pattern during the year. ◦ If the flow regime varies very little, it is regular. ◦ If the flow regime varies a lot, it it irregular River Ibia - Brasil
  17. 17. Torrents, lakes and reservoirs  Water can also be found in other places on the surface of the Earth. ◦ Torrents ◦ Lakes ◦ Reservoirs
  18. 18. Torrent  They are streams of water which form after heavy rains
  19. 19. Lakes  They are large bodies of water surrounded by land.
  20. 20. Reservoirs  They are man – made lakes. They produce energy, irrigate fields and supply water to urban areas. Canals and irrigation chanels are used for transporting water from a reservoir to other places
  21. 21. Reservoir in Hillsborough County
  22. 22. What is a watershed?  Rivers that flow into the same sea belong to the same watershed (vertiente).  The rivers in Spain flow into three different seas, in other words, they belong to three watersheds: ◦ Cantabrian watershed ◦ Mediterranean watershed ◦ Atlantic watershed
  23. 23.  Meter imagen de vertientes hidrográficas
  24. 24. Cantabrian Watershed  It has short, swift rivers.  They have a regular flow regime and abundant flow.  The most important rivers are the Nervion, Saja, Navia and Nalón
  25. 25. Mediterranean watershed  It occupies about one third of Spain.  With the exception of the Ebro, the rivers are short and have irregular regimes.  During rainy seasons, they may overflow. In the summer, they may dry up.  The most important rivers are the Ebro, the Júcar, the Segura and de Llobregat
  26. 26. Ebro River It is the most plentiful river of mediterranean watershed
  27. 27. Atlantic watershed  It occupies more than half area of Spain.  The rivers have abundant flows and regular flows regimes.  In the summer they carry less water.  The most important rivers are the Miño, the Duero, the Tagus, the Guadiana and the Guadalquivir