Definition of Cuenca
Basin is understood as that depression or geographical form that causes the territory to lose height as it approaches sea level. The river basins are those that make the water that comes from the mountains or from the thaw, descend through the depression until it reaches the sea. In some cases, the basin may not reach sea level if it is a valley enclosed by mountains, in which case the aquifer formation will be a lagoon or lake.
Watersheds can be divided into two main types: endorheic basins, those that do not reach the sea, which result in the formation of stagnant water systems (such as lakes or lagoons); and the exorreic basins, those that do reach the sea and therefore are not enclosed between the different sets of mountains. Normally, basins, both endorheic or exorheic, can generate a large number of tributaries that all fall into the main watercourse, be it sea, ocean , lake or lagoon. At the same time, as these tributaries approach their final destination they lose the original intensity they had at the beginning of their descent course.
The river basins are of great importance for the environment as well as for the human being. In this sense, they act as important water reservoirs that can be used not only by the human being for personal consumption , different economic activities such as agriculture or navigation, but also for the consumption of animals and plants and therefore the development of complete and durable biotic systems.
Needless to say, on the planet Earth we find numerous river basins, each of them possessing particular characteristics. Some of the current seas are considered endorheic watersheds due to the progressive loss of their contact with the ocean.