The lagoon is one of the many water forms that we can find on our planet Earth. The lagoon is a normally closed aquatic space with still or stagnant water, unlike what happens with other waterways such as the sea or rivers. The lagoons, in addition, are characterized by having fresh water (not salty like the sea or the ocean) that usually comes either from the melting of glacier currents or from the accumulation of rain. The lagoons can vary in their size and are similar in this sense to the lakes although in general they can be smaller than them.
There are two elements that are important for the formation of a lagoon. In the first place, that the land where this watercourse forms has a lower altitude than that of the surroundings, as is the case with a valley between mountains or higher ground. This allows water to accumulate in that space that cannot later be drained or that it is, but in a very small quantity. The second important element for the formation of a lagoon is precisely the water that will come from two different sources: the melting of nearby glaciers or the rain. In both cases, the water is fresh unlike sea or ocean water.
The lagoon shares the type of water with the rivers and streams, all these water courses having the type of fresh water that can be used for human consumption and that causes large populations to be located around it or in its vicinity. However, the lagoon differs from rivers or streams in the fact that it is a stagnant water course, that is, it does not have permanent movement. This contributes to making the water resources that humans can extract from a lagoon much more accessible than those that can be extracted from the river. The lagoons have a characteristic type of flora and fauna that has to do with the type of water, its lack of movement, the depth of the terrain, etc.
