Amazon River is one of the most important rivers in the world and being the largest in the world’s rivers in terms of the volume in South Africa. The origin of the Amazon River is in the Peruvian Andes. Since its source until mouth in the Atlantic Ocean from Brazil. The total length of the river where measured from the headwaters of the Ucayali-Apurímac river system in southern Peru is at least 6,400 km, which makes it a little shorter than the Nile River but still the comparable of the distance from New York City to Rome.
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The water resources provided for the Amazon River represent the 20% of the available freshwater in the world. The flow in the Amazon River increases section from November to June, from this month starts to fall until October; being the lowest flow period in August and September while the highest occurs from January to May. Similarly, in the Madeira river, the increase in flow can be noted a part from January; which starts to fall two months earlier that the main river.
Amazon region is characterized for having low densities of population, with problems of contamination which causes are related to wastewater treatment in located cities such as Belen and Manaus in Brazil, and Iquitos in Peru, mineral extraction. In the Amazon basin, the water resources are related to the fishing, navigation, and hydroelectric power. The potential use of the hydropower in Amazon region represents the 40 percent of total energy in Brazil. Moreover, for generating energy in the region, dams were built. The Tucurí dam on the Tocantins River in Pará state, the Balbina dam on the Uatumã River in Amazonas state, and Samuel Dam on the Jamari River in Rondônia state − which were built to supply electricity both for the cities of the Amazon region Manaus, Belen and Porto Velho respectively.