Geography of Brazil
The country of Brazil occupies roughly half of South America, bordering the Atlantic Ocean. Brazil covers a total area of which includes of land and of water. The highest point in Brazil is Pico da Neblina at. Brazil is bordered by the countries of Argentina, Bolivia, Colombia, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela, and French Guiana.
Much of the climate is tropical, with the south being relatively temperate. The largest river in Brazil, and the second longest in the world, is the Amazon.
Size and geographical location
Brazil occupies most of the eastern part of the South American continent and its geographic heartland and various islands in the Atlantic Ocean. The only countries in the world that are larger are Russia, Canada, China and the United States. The national territory extends from north to south, and from east to west. It spans four time zones, the westernmost of which is equivalent to Eastern Standard Time in the United States. The time zone of the capital and of the most populated part of Brazil along the east coast is two hours ahead of Eastern Standard Time. The Atlantic islands are in the easternmost time zone.This continent occupies almost half of the total area. Its coasts are washed by the waters of the Atlantic Ocean in the east. Brazil borders all South American countries except Chile and Ecuador. It ranks 5th among the countries of the world in terms of area. The territory of Brazil is located on the ancient South American platform. Therefore, the relief consists of lowlands and flat mountains. In the north, a large area is occupied by the Amazonian lowland. To the south of it is the strongly dissected Brazilian lowland. Between the Brazilian lowland and the Atlantic Ocean is a narrow coastal lowland. Brazil has large deposits of oil, iron, bauxite, nickel, uranium, manganese ores, diamonds and other minerals. Due to the fact that most of it is located in the equatorial and subequatorial climatic zones and the influence of the trade winds blowing from the Atlantic Ocean, the climatic conditions are characterized by high humidity and heat. Due to the temperate climate, the hydrographic network in Brazil is very well developed. The longest and most fertile river in the world, the Amazon, flows through the north of the country. The Amazon basin has formed one of the largest and thickest massifs on our planet. In addition to the Amazon, Brazil also has such large rivers as the Paraná, Tocantins, and São Francisco. In general, Brazil is one of the countries best endowed with water, hydroelectric power, and forest resources.
Brazil possesses the archipelago of Fernando de Noronha, located northeast of its "horn", and several small islands and atolls in the Atlantic - Abrolhos, Atol das Rocas, Penedos de São Pedro e São Paulo, Trindade, and Martim Vaz. In the early 1970s, Brazil claimed a territorial sea extending from the country's shores, including those of the islands.
On Brazil's east coast, the Atlantic coastline extends. In the west, in clockwise order from the south, Brazil has of borders with Uruguay, Argentina, Paraguay, Bolivia, Peru, Colombia, Venezuela, Guyana, Suriname, and French Guiana. The only South American countries with which Brazil does not share borders are Chile and Ecuador. A few short sections are in question, but there are no true major boundary controversies with any of the neighboring countries. Brazil has the 10th largest Exclusive Economic Zone of.
Brazil's 49 major ecosystems include the Amazon Basin, Pantanal, Cerrado, Caatinga, Atlantic Forest, and Pampas, each contributing uniquely to the country's rich biodiversity and environmental diversity. In Brazil forest cover is around 59% of the total land area, equivalent to 496,619,600 hectares of forest in 2020, down from 588,898,000 hectares in 1990. In 2020, naturally regenerating forest covered 485,396,000 hectares and planted forest covered 11,223,600 hectares. Of the naturally regenerating forest 44% was reported to be primary forest and around 30% of the forest area was found within protected areas. For the year 2015, 56.% of the forest area was reported to be under public ownership and 400% private ownership.
Geology, geomorphology and drainage
In contrast to the Andes, which rose to elevations of nearly in a relatively recent epoch and inverted the Amazon's direction of flow from westward to eastward, Brazil's geological formation is ancient. Precambrian crystalline shields cover 36% of the territory, especially its central area. The dramatic granite sugarloaf mountains in the city of Rio de Janeiro are an example of the terrain of the Brazilian shield regions, where continental basement rock has been sculpted into towering domes and columns by tens of millions of years of erosion, untouched by mountain-building events.The principal mountain ranges average elevations under. The Serra do Mar Range hugs the Atlantic coast, and the Serra do Espinhaço Range, the largest in area, extends through the south-central part of the country. The highest mountains are in the Tumucumaque, Pacaraima, and Imeri ranges, among others, which traverse the northern border with the Guianas and Venezuela.
In addition to mountain ranges, Brazil's Central Highlands include a vast central plateau. The plateau's uneven terrain has an average elevation of. The rest of the territory is made up primarily of sedimentary basins, the largest of which is drained by the Amazon and its tributaries. Of the total territory, 41% averages less than in elevation. The coastal zone is noted for thousands of kilometers of tropical beaches interspersed with mangroves, lagoons, and dunes, as well as numerous coral reefs. A recent global remote sensing analysis also suggested that there were 5,389 km2 of tidal flats in Brazil, making it the 7th ranked country in terms of how much tidal flat occurs there.
The Parcel de Manuel Luís Marine State Park off the coast of Maranhão protects the largest coral reef in South America.
Image:Brazil topo.jpg|thumb|250px|Topographic map of Brazil
Brazil has one of the world's most extensive river systems, with eight major drainage basins, all of which drain into the Atlantic Ocean. Two of these basins—the Amazon and Tocantins-Araguaia account for more than half the total drainage area. The largest river system in Brazil is the Amazon, which originates in the Andes and receives tributaries from a basin that covers 45.7% of the country, principally the north and west. The main Amazon river system is the Amazonas-Solimões-Ucayali axis, flowing from west to east. Through the Amazon Basin flows one-fifth of the world's fresh water. A total of of the Amazon are in Brazilian territory. Over this distance, the waters decline only about. The major tributaries on the southern side are, from west to east, the Javari, Juruá, Purus, Madeira, Tapajós, Xingu, and Tocantins. On the northern side, the largest tributaries are the Branco, Japurá, Jari, and Rio Negro. The above-mentioned tributaries carry more water than the Mississippi. The Amazon and some of its tributaries, called "white" rivers, bear rich sediments and hydrobiological elements. The black-white and clear rivers—such as the Negro, Tapajós, and Xingu—have clear or dark water with few nutrients and little sediment.
The major river system in the Northeast is the Rio São Francisco, which flows northeast from the south-central region. Its basin covers 7.6% of the national territory. Only of the lower river are navigable for oceangoing ships. The Paraná system covers 14.5% of the country. The Paraná flows south among the Río de la Plata Basin, reaching the Atlantic between Argentina and Uruguay. The headwaters of the Paraguai, the Paraná's major eastern tributary, constitute the Pantanal, the largest contiguous wetlands in the world, covering as much as.
Below their descent from the highlands, many of the tributaries of the Amazon are navigable. Upstream, they generally have rapids or waterfalls, and boats and barges also must face sandbars, trees, and other obstacles. Nevertheless, the Amazon is navigable by oceangoing vessels as far as upstream, reaching Iquitos in Peru. The Amazon river system was the principal means of access until new roads became more important. Hydroelectric projects are Itaipu, in Paraná, with 12,600 MW; Tucuruí, in Pará, with 7,746 MW; and Paulo Afonso, in Bahia, with 3,986 MW.
Natural resources
Natural resources in Brazil include bauxite, gold, iron ore, manganese, nickel, phosphates, platinum, tin, clay, rare earth elements, uranium, petroleum, hydropower, and timber.Rivers and lakes
According to organs of the Brazilian government there are 12 major hydrographic regions in Brazil. Seven of these are river basins named after their main rivers; the other five are groupings of various river basins in areas which have no dominant river.- 7 hydrographic regions named after their dominant rivers:
- * Amazonas
- * Paraguai
- * Paraná
- * Parnaíba
- * São Francisco
- * Tocantins
- * Uruguay
- 5 coastal Hydrographic Regions based on regional groupings of minor river basins :
- * Atlântico Nordeste Ocidental
- * Atlântico Nordeste Oriental
- * Atlântico Leste
- * Atlântico Sudeste
- * Atlântico Sul
Soil and vegetation
Brazil's tropical soils produce almost 210 million tons of grain crops per year, from about 70 million hectares of crops. The country also has the 5th largest arable land area in the world. Burning also is used traditionally to remove tall, dry, and nutrient-poor grass from pasture at the end of the dry season. Until mechanization and the use of chemical and genetic inputs increased during the agricultural intensification period of the 1970s and 1980s, coffee planting and farming, in general, moved constantly onward to new lands in the west and north. This pattern of horizontal or extensive expansion maintained low levels of technology and productivity and placed emphasis on quantity rather than the quality of agricultural production.The largest areas of fertile soils, called terra roxa, are found in the states of Paraná and São Paulo. The least fertile areas are in the Amazon, where the dense rainforest is. Soils in the Northeast are often fertile, but they lack water, unless they are irrigated artificially.
In the 1980s, investments made possible the use of irrigation, especially in the Northeast Region and in Rio Grande do Sul State, which had shifted from grazing to soy and rice production in the 1970s. Savanna soils also were made usable for soybean farming through acidity correction, fertilization, plant breeding, and in some cases spray irrigation. As agriculture underwent modernization in the 1970s and 1980s, soil fertility became less important for agricultural production than factors related to capital investment, such as infrastructure, mechanization, use of chemical inputs, breeding, and proximity to markets. Consequently, the vigor of frontier expansion weakened.
The variety of climates, soils, and drainage conditions in Brazil is reflected in the range of its vegetation types. The Amazon Basin and the areas of heavy rainfall along the Atlantic coast have tropical rain forest composed of broadleaf evergreen trees. The rain forest may contain as many as 3,000 species of flora and fauna within a area. The Atlantic Forest is reputed to have even greater biological diversity than the Amazon rain forest, which, despite apparent homogeneity, contains many types of vegetation, from high canopy forest to bamboo groves.
In the semiarid Northeast, caatinga, a dry, thick, thorny vegetation, predominates. Most of central Brazil is covered with a woodland savanna, known as the cerrado, which became an area of agricultural development after the mid-1970s. In the South, needle-leaved pinewoods cover the highlands; grassland similar to the Argentine pampa covers the sea-level plains. The Mato Grosso swamplands is a Florida-sized plain in the western portion of the Center-West. It is covered with tall grasses, bushes, and widely dispersed trees similar to those of the cerrado and is partly submerged during the rainy season.
Image:Brazil veg 1977.jpg|thumb|350px|Natural vegetation map of Brazil, 1977. The "Paraná pine" is a conifer but not a pine, pines are not native to the Southern Hemisphere.
Brazil, which is named after reddish dyewood, has long been famous for the wealth of its tropical forests. These are not, however, as important to world markets as those of Asia and Africa, which started to reach depletion only in the 1980s. By 1996 more than 90% of the original Atlantic forest had been cleared, primarily for agriculture, with little use made of the wood, except for araucaria pine in Paraná.
The inverse situation existed with regard to clearing for wood in the Amazon rain forest, of which about 15% had been cleared by 1994, and part of the remainder had been disturbed by selective logging. Because the Amazon forest is highly heterogeneous, with hundreds of woody species per hectare, there is considerable distance between individual trees of economic value, such as mahogany and Pereira. Therefore, this type of forest is not normally cleared for timber extraction but logged through high-grading or selection of the most valuable trees. Because of vines, felling, and transportation, their removal causes destruction of many other trees, and the litter and new growth create a risk of forest fires, which are otherwise rare in rainforests. In favorable locations, such as Paragominas, in the northeastern part of Pará State, a new pattern of timber extraction has emerged: diversification and the production of plywood have led to the economic use of more than 100 tree species.
Starting in the late 1980s, rapid deforestation and extensive burning in Brazil received considerable international and national attention. Satellite images have helped document and quantify deforestation as well as fires, but their use also has generated considerable controversy because of problems of defining original vegetation, cloud cover, and dealing with secondary growth and because fires, as mentioned above, may occur in old pasture rather than signifying new clearing. Public policies intended to promote sustainable management of timber extraction, as well as sustainable use of nontimber forest products, were being discussed intensely in the mid-1990s. However, implementing the principles of sustainable development, without irreversible damage to the environment, proved to be more challenging than establishing international agreements about them.