Sewer system It is a term that comes from French drainage and which refers to the action and effect of draining . This verb, in turn, means ensure liquid leakage or excessive humidity through pipes, pipes or ditches.
For the engineering and urban planning, drainage is the interconnected piping system that allows the eviction of storm or other liquids . He sanitary drainage It is the one that takes liquid waste from homes or industries to treatment plants, where a treatment is carried out so that the liquid can be poured into a water channel and the hydrological cycle continues to develop.
The first drainage systems date back several millennia before Christ, although they are designs on the ground, while today they are built networks underground. Only in the 19th century, the French created the first underground system; Since then, more and more European cities in the center of the continent followed in their footsteps, taking advantage of nearby rivers to drain the waters.
He storm drain , meanwhile, is the system which facilitates the transfer of rainwater so that it can be used. Another of its purposes, perhaps the most important, is to prevent cities from flooding.
A poor drainage system puts a city in risk; A clear example of the consequences of a poor design can be seen in the history of Hurricane Katrina, which hit the US state of New Orleans in August 2005, since the flood that followed the catastrophe took many months to resolve.
Another danger posed by a drainage system is the contamination; Since there is no strict control of materials that are constantly discarded in the pipes, it is possible to pour toxic materials that threaten silently To the entire population. On the other hand, it is important to note that when the volume of waste is small, the risk is lower. In 1992, a series of explosions took place in the Mexican city of Guadalajara, covering more than eight kilometers, claiming many lives, due to a gas spill in the sewers.
It is worth mentioning that within the universe of the myths and urban legends, sewers occupy a leading place; For decades, countless meetings have been reported with species unknown or that should not be in a city, that peeked out of the houses' drains or through the sewers. Without a doubt, the history of large reptiles in the American pipes It is the most popular worldwide; but chilling discoveries have been made in many other places on the planet.
As is often the case in these cases, it is very difficult to distinguish between true stories and manufactured to generate fear in citizens; In addition, not all people who describe a real experience can give details or concrete information about the creature They have seen. It has been shown, however, that the unusual mixture of organic matter that takes place in the sewers has led to the birth of species that are not found in other ecosystems, which confirms that it is absolutely possible to spot an uncommon living being in the drainage systems; This does not rule out that many times people get confused, the product of suggestion, and notice life in a simple bundle of waste.
A geological drainage , on the other hand, is a surface transport network of the Water and of the sediments that usually permeabilize the upper layers of a land and then constitute streams.
Finally, the notion of drainage is also used in medicine to name the utensil that allows extracting excess fluids, sometimes abnormal, from a wound, cavity or abscess.