Rivers, or river courses, have always been, and are to this day, one of the most important resources for the survival of humanity. It is they who use much of the water they consume, who use to produce our food, which is necessary for our hygiene and which is used to irrigate or soil the agricultural areas.
In addition, rivers are also very important in that they are used in various regions as natural routes of circulation along which, as vessels move carrying goods and people; and also for its use in the production of hydropower, without forgetting the importance they have for the exploitation of fisheries as a food source.
For Europeans in particular,, for explorations and navigation courses, it was crucial for them to explore different regions of the world.