The Parana River, that flows throughout an ample fault of continental magnitude, reaches a length of 2,570 kilometers and constitutes one of the axes collectors of the gigantic Río de la Plata that has a total surface of 1,500,000 km2. The Delta of Parana occupies a surface of 14,000 km2 and has a wide length of 320 km and a very variable one, that go as opposed to from 18 km Baradero to more than 60 km between the Lujan River and Gutiérrez River. Parana River is an alive delta of 14,000 km2, originated by the originating sediment deposition of all the Río de la Plata. The sediments that are deposited on the River of the Silver gives to the Delta of Parana its singularity him to world-wide level. This characteristic determines the permanent "advance" of the Delta, that is considered between 70 to 90 meters per year.
The moderating effect of the winter temperatures, produced by the great masses of water that conform the Delta of Parana, allows the establishment, in tempered latitudes, of species animals and vegetables of subtropical origin. The predominant plants in the Delta of Parana are aquatic and palustres species as Camalotes and Totoras. Abound the lianas and epífitas species and lodges a great diversity of arboreal species like as Laurel, Ingá, Higuerón, Canelón, Anacahuita, Mataojo, Bathed Thorn and Paraná pine. Between the vertebrates, the group of the Fish is one of the most varied in the Delta, having itself detected for the region 223 species. The mammals, amphibians and reptiles have taken advantage of to reach these latitudes, means of natural transport: the "camalotales". On these platforms they have been a infinity of insects, vipers, frogs, toads, poisonous snakes, Howling Jacares, Capybaras, Monkeys, and in the camalotales of great size, until Yaguaretés.
The hunting in the Delta has taken to the disappearance of species like the Yaguareté and to put in danger of extinction to the Lobito de Río, to the Red deer of Marshes and other animals as the Coipo and the Capybara.
In Buenos Aires it occupies the northeast portion of the Parties of San Pedro, Baradero, Zárate, Campana, Escobar and Tigre, and the totality of the Partido of San Fernando.
The Buenosarian Delta occupies a territory of 88,624 hectares in the municipality San Fernando. There are very beautiful landscapes but the contaminated waters are serious problem. The Reconquista river, that as it is known ends at the Luján river to the height of Tigre, contributes only 33% of contamination by means of a concentration of bacilli coli to he that preannounce the presence of only comparable pathogenic germs to which they are in cloacales liquids. The lack of an suitable treatment of the polluting affluents periodically carries massive losses of life of fish and serious sanitary problems to the coastal populations.