Geography

Examples of rivers

A ” river ” is called a stream of fresh water with a certain flow and that varies in the different seasons of the year. A river, on the other hand, has a certain flow or course towards which the water is directed. In other words, a river is not stagnant water, although it can happen that, due to lack of water during a certain time of year, droughts occur, which in some cases the water stagnates, but usually the river has a certain current.

Although the river presents a certain direction of the water, this does not mean that currents (eddies of water) cannot be produced under it. That is, due to the type of soil in the river (mud, clay, stones, sand, etc.) it can generate contrary currents of water, although these do not usually extend for long distances.

Course and parts of a river

Every river flows into another tributary of water, which can be another river with a greater flow, a lake or the sea. On the other hand, it is called ” birth ” to the place where a river is born and ” mouth ” to the final part of it.

Especially high-flow rivers are classified or divided into three parts: upper course, middle course and lower course.

  • Upper reaches. This part is the one where the river is born. It generally coincides with mountainous areas where, generally by melting ice, the water delineates the land, naturally forming a river that descends from it to lower areas.
  • Middle course. It corresponds to the middle area of ​​the river. It has fluctuations in current and also in depth. It is during this middle course that the flow decreases, although it still continues to have sufficient strength or energy.
  • Lower course. This part is characterized by corresponding to flat areas, so the river loses a lot of force and water speed. In this way, horseshoe-shaped lakes, deltas, sedimentary islands, etc. can form in this area.

Types of rivers

There are different types of rivers ; some can be classified according to the period of activity . That is, they are rivers that do not have flow throughout the year but only during high rainfall seasons.

In addition, it is possible to classify rivers according to their age since there are many rivers that are young, mature or old. This is related to the rainfall of the place and to the age of the mountainous elevations that indicate the course of the river.

It is also possible to determine a river according to its geometry or morphology . That is, the curvatures or not that it makes from birth to the mouth. This, of course, will depend on the relief of the place.

Finally, rivers can be classified into international rivers or national rivers . Each State must exercise territorial sovereignty of the river that is in its own territory. However, for international rivers (that is, rivers that cross more than one country) freedom of navigation must be established.

Importance of rivers

The importance of rivers in the different ecosystems is crucial since they provide water for the fauna and flora of each site. Such is the importance of rivers that they can completely modify the habitat and customs for some animals. In the same way, the flora of a certain place could be affected, especially if it is dry soils. As for the life of human beings, ancient civilizations have taken into account the course and flow of water in rivers in order to settle near them and supply the peoples with fresh water.

30 Examples of rivers

Rivers of North America

  1. Colorado River – United States of America
  2. Mackenzie River – Canada
  3. Mississippi River – United States of America
  4. Missouri River – United States of America
  5. Saint Lawrence River – Canada

Rivers of South America

  1. Amazon River – Brazil
  2. Apurímac River – Peru
  3. Essequibo River – Guyana and Venezuela
  4. Madeira River – Brazil
  5. Magdalena River – Colombia
  6. Mamoré River – Bolivia
  7. Marañón River – Peru
  8. Rio Negro – Argentina
  9. Orinoco River – Colombia and Venezuela
  10. Paraguay River – Brazil, Bolivia, Paraguay and Argentina
  11. Paraná River – Argentina
  12. Pilcomayo River – Argentina
  13. Rio Purús – Peru and Brazil
  14. Rio San Francisco – Brazil
  15. Tocantins River – Brazil
  16. Ucayali River – Peru
  17. Uruguay River – Brazil, Uruguay and Argentina
  18. Xingu River – Brazil

Other rivers of the world

  1. Yellow River or Huang He – China
  2. Amur River – China
  3. Congo River – Central Africa
  4. EYangzi River – China
  5. Lena River – Siberia
  6. Nile River – Egypt
  7. Obi River – Russia

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