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Tapajós People
The Tapajós ( ) is a river in Brazil. It runs through the Amazon Rainforest and is a major tributary of the Amazon River. When combined with the Juruena River, the Tapajós is approximately long. Prior to a drastic increase in illegal gold mining and consequent soil erosion it was one of the largest clearwater rivers and currently is an anthropogenic whitewater river, accounting for about 6% of the water in the Amazon basin. Course For most of its length the Tapajós runs through Pará State, but the upper (southern) part forms the border between Pará and Amazonas State. The source is at the Juruena–Teles Pires river junction. The Tapajós River basin accounts for 6% of the water in the Amazon Basin, making it the fifth largest in the system.Hales, J., and P. Petry (2013). Tapajos – Juruena'. Freshwater Ecoregions of the World. Retrieved 16 February 2013. From the lower Arinos River (a tributary of Juruena) to the Maranhão Grande falls are a more or less continuous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Itaituba
Itaituba is a city and municipality located in the state of Pará, Brazil, and one of the most important socioeconomic centers in the western region of the State. Location Itaituba is the fifteenth largest city (by population) in the State of Pará, third largest city in the western region, and has the thirteenth largest gross domestic product in the state. The city is regarded as a medium-sized city, and one of the Economic growth, fastest growing cities in the countryside of Brazil. The name of the city origins from Tupi language, Tupi (an indigenous language), which literally means ''gravel place''. People from the city of Itaituba are known as ''itaitubenses''. The city nickname is ''cidade pepita'', which translates as "gold nugget city." The city is known for the intense gold mining activity in the valley of the Tapajós River, the multitude of landscapes (such as the sandy river beaches that are formed during the dry seasons, and also the waterfalls located in the distri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamanxim River
The Jamanxim River is a river of Pará state in north-central Brazil. Originating in the Serra do Cachimbo, it is a tributary of the Tapajós, into which it flows a few kilometers upstream from Itaituba. Course The river flows through the Tapajós-Xingu moist forests ecoregion. It flows through the Itaituba I National Forest, a sustainable use conservation area established in 1998. The river basin also contains part of the Rio Novo National Park, a conservation unit created in 2006. Hydroelectric potential Its hydroelectric potential, along with that of the Tapajós, was assessed by Eletronorte (Centrais Elétricas do Norte do Brasil S.A.), the regional power authority, identifying nine potential dam sites, including four along the Jamanxim. at Cachoeira dos Patos, (estimated at 28 MW); Cachoeira do Caí, (estimated at 802 MW); at Jardim do Ouro and at Jamanxim (estimated at 881 MW). If all were constructed, these dams would flood a total of 103,700 ha, including 33,216 ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arinos River
The Arinos River is a river in Brazil. It is located east of, and empties into, the Juruena River. Some of the Suyá Indians, a Gê-speaking people of central Brazil, migrated from the state of Maranhão Maranhão () is a States of Brazil, state in Brazil. Located in the country's Northeast Region, Brazil, Northeast Region, it has a population of about 7 million and an area of and it is divided into 217 municipalities. Clockwise from north, it ... to this river. References *Arinos River. (2009). In Encyclopædia Britannica. Retrieved September 14, 2009, from Encyclopædia Britannica Online: http://www.britannica.com/EBchecked/topic/34318/Arinos-River Footnotes Rivers of Mato Grosso {{MatoGrosso-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazon Basin
The Amazon basin is the part of South America drained by the Amazon River and its tributary, tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname, and Venezuela, as well as the territory of French Guiana. Most of the basin is covered by the Amazon rainforest, also known as Amazon rainforest, Amazonia. With a area of dense tropical forest, it is the largest rainforest in the world. Geography The Amazon River begins in the Andes, Andes Mountains at the west of the basin with its main tributary the Marañón River and Apurímac River, Apurimac River in Peru. The highest point in the Drainage divide, watershed of the Amazon is the second biggest peak of Yerupajá at . The Amazon River Basin occupies the entire central and eastern area of South America, lying to the east of the Andes mountain range and extending from th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Source (river Or Stream)
The headwater of a river or stream is the geographical point of its beginning, specifically where surface runoff water begins to accumulate into a flowing channel of water. A river or stream into which one or many tributary rivers or streams flows has many headwaters, these being all of the individual headwaters of its tributaries. Each headwater is one of the river or stream's sources, as it is the place where surface runoffs from rainwater, meltwater, or spring water begin accumulating into a more substantial and consistent flow that becomes a first-order tributary of that river or stream. The tributary with the longest channel of all the tributaries to a river or stream, such length measured from that tributary's headwater to its mouth where it discharges into the river or stream, is the main stem of the river or stream in question. Definition The United States Geological Survey (USGS) states that a river's "length may be considered to be the distance from the mouth to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazonas (Brazilian State)
Amazonas () is a federative units of Brazil, state of Brazil, located in the North Region, Brazil, North Region in the north-western corner of the country. It is the Federative units of Brazil#List, largest Brazilian state by area and the list of the largest country subdivisions by area, ninth-largest country subdivision in the world with an area of 1,570,745.7 square kilometers. It is the largest country subdivision in South America, being greater than the areas of Chile, Paraguay, and Uruguay combined. Neighbouring states are (from the north clockwise) Roraima, Pará, Mato Grosso, Rondônia, and Acre (state), Acre. It also borders the nations of Peru, Colombia and Venezuela. This includes the departments of Colombia, Departments of Amazonas (Colombian department), Amazonas, Vaupés Department, Vaupés and Guainía Department, Guainía in Colombia, as well as the Amazonas State, Venezuela, Amazonas state in Venezuela, and the Loreto Region in Peru. Amazonas is named after the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazon Basin
The Amazon basin is the part of South America drained by the Amazon River and its tributary, tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname, and Venezuela, as well as the territory of French Guiana. Most of the basin is covered by the Amazon rainforest, also known as Amazon rainforest, Amazonia. With a area of dense tropical forest, it is the largest rainforest in the world. Geography The Amazon River begins in the Andes, Andes Mountains at the west of the basin with its main tributary the Marañón River and Apurímac River, Apurimac River in Peru. The highest point in the Drainage divide, watershed of the Amazon is the second biggest peak of Yerupajá at . The Amazon River Basin occupies the entire central and eastern area of South America, lying to the east of the Andes mountain range and extending from th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitewater River (river Type)
A whitewater river is classified based on its chemistry, sediments and water colour. Whitewater rivers have high levels of suspended sediments, giving the water a pH that is near-neutral, a high electric conductivity and a pale muddy, '' café au lait''-like colour. Whitewater rivers are of great ecological importance and are important to local fisheries. The major seasonal Amazonian floodplains known as '' várzea'' receive their water from them. The best-known whitewater rivers are Amazonian and have their source in the Andes, but there are also whitewater rivers elsewhere in South America and in other continents. Amazonian rivers fall into three main categories: whitewater, blackwater and clearwater. This classification system was first proposed by Alfred Russel Wallace in 1853 based on water colour, but the types were more clearly defined according to chemistry and physics by from the 1950s to the 1980s. Although many Amazonian rivers fall clearly into one of these cate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthropogenic Biome
Anthropogenic biomes, also known as anthromes, human biomes or intensive land-use biomes, describe the terrestrial biosphere in its contemporary, human-altered form using global ecosystem units (biomes) defined by global patterns of sustained direct human interaction with ecosystems. Anthromes are generally composed of heterogeneous mosaics of different land uses and land covers, including significant areas of fallow or regenerating habitats. Origin and evolution of the concept Anthromes were first named and mapped by Erle Ellis and Navin Ramankutty in their 2008 paper, "Putting People in the Map: Anthropogenic Biomes of the World". Anthrome maps now appear in numerous textbooks. and in the National Geographic World Atlas. The most recent version oanthrome mapswere published in 2021. In a recent global ecosystem classification, anthropogenic biomes have been incorporated into several distinct functional biomes in the terrestrial and freshwater realms, and additional units hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clearwater River (river Type)
A clearwater river is classified based on its chemistry, sediments and water colour. Clearwater rivers have a low conductivity, relatively low levels of dissolved solids, typically have a neutral to slightly acidic pH and are very clear with a greenish colour. Clearwater rivers often have fast-flowing sections. The main clearwater rivers are South American and have their source in the Brazilian Plateau or the Guiana Shield. Outside South America the classification is not commonly used, but rivers with clearwater characteristics are found elsewhere. Amazonian rivers fall into three main categories: clearwater, blackwater and whitewater. This classification system was first proposed by Alfred Russel Wallace in 1853 based on water colour, but the types were more clearly defined according to chemistry and physics by from the 1950s to the 1980s. Although many Amazonian rivers fall clearly into one of these categories, others show a mix of characteristics and may vary depending ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil Erosion
Soil erosion is the denudation or wearing away of the Topsoil, upper layer of soil. It is a form of soil degradation. This natural process is caused by the dynamic activity of erosive agents, that is, water, ice (glaciers), snow, Atmosphere of Earth, air (wind), plants, and animals (including humans). In accordance with these agents, erosion is sometimes divided into water erosion, glacial erosion, snow erosion, Aeolian erosion, wind (aeolian) erosion, Zoogenic erosion, zoogenic erosion and anthropogenic erosion such as tillage erosion. Soil erosion may be a slow process that continues relatively unnoticed, or it may occur at an alarming rate causing a serious loss of topsoil. The loss of soil from Agricultural land, farmland may be reflected in reduced crop production potential, lower surface water quality and damaged drainage networks. Soil erosion could also cause sinkholes. Human activities have increased by 10–50 times the rate at which erosion is occurring world-wide. Exc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illegal Mining
Illegal mining is mining activity that is undertaken without state permission. Illegal mining is the extraction of precious metals/rocks without following the proper procedures to participate in legal mining activity. These procedures include permits and licenses for exploration of the land, mining and transportation. Illegal mining can be a subsistence activity, as is the case with artisanal mining, or it can belong to large-scale/Rocks organized crime, spearheaded by illegal mining syndicates. On an international level, approximately 80 percent of small-scale mining operations can be categorized as illegal. Despite strategic developments towards "responsible mining," even big companies can be involved in illegal mineral digging and extraction, if only on the financing side. Large-scale mining operations are owned by large companies nationally and use advanced technology to extract metals; these operations use open-pit mining. Artisanal small-scale mining operations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
