In Portuguese

Portuguese language

Portuguese is a Romance language that arose in the medieval Kingdom of Galicia, nowadays Galicia and Northern Portugal. The southern part of the Kingdom of Galicia became independent as the County of Portugal in 1095...

, the word sertão (seʁˈtɐ̃w̃, backcountry

Backcountry

A backcountry area in general terms is a geographical region that is:* isolated* remote* undeveloped* difficult to accessThe term may apply to various regions that are reasonably close to urban areas but are:* not immediately accessible by car...

) first referred to the vast hinterlands of Asia that Lusitanian explorers encountered. In Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

, the geographical term referred to backlands away from the Atlantic coastal regions where the Portuguese first settled in South America in the early sixteenth century. A Brazilian historian once referred to colonial life in Brazil as a "civilization of crabs", as most settlers clung to the shoreline, with few trying to make inroads into the sertão. In modern terms, "sertão" usually refers to the semi-arid region in Northeastern Brazil

Northeast Region, Brazil

The Northeast Region of Brazil is composed of the following states: Maranhão, Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, Sergipe and Bahia, and it represents 18.26% of the Brazilian territory....

 comprising parts of the states of Alagoas

Alagoas

Alagoas is one of the 27 federative units of Brazil and is situated in the eastern part of the Northeast Region. It borders: Pernambuco ; Sergipe ; Bahia ; and the Atlantic Ocean . It occupies an area of 27,767 km², being slightly larger than Haiti...

, Bahia

Bahia

Bahia is one of the 26 states of Brazil, and is located in the northeastern part of the country on the Atlantic coast. It is the fourth most populous Brazilian state after São Paulo, Minas Gerais and Rio de Janeiro, and the fifth-largest in size...

, Pernambuco

Pernambuco

Pernambuco is a state of Brazil, located in the Northeast region of the country. To the north are the states of Paraíba and Ceará, to the west is Piauí, to the south are Alagoas and Bahia, and to the east is the Atlantic Ocean. There are about of beaches, some of the most beautiful in the...

, Paraíba

Paraíba

Paraíba Paraíba Paraíba (Tupi: pa'ra a'íba: "bad to navigation"; Brazilian Portuguese pronunciation: is a state of Brazil. It is located in the Brazilian Northeast, and is bordered by Rio Grande do Norte to the north, Ceará to the west, Pernambuco to the south and the Atlantic Ocean to the east...

, Rio Grande do Norte

Rio Grande do Norte

Rio Grande do Norte is one of the states of Brazil, located in the northeastern region of the country, occupying the northeasternmost tip of the South American continent. Because of its geographic position, Rio Grande do Norte has a strategic importance. The capital and largest city is Natal...

, Ceará

Ceará

Ceará is one of the 27 states of Brazil, located in the northeastern part of the country, on the Atlantic coast. It is currently the 8th largest Brazilian State by population and the 17th by area. It is also one of the main touristic destinations in Brazil. The state capital is the city of...

 and Piauí

Piauí

Piauí is one of the states of Brazil, located in the northeastern part of the country.Piauí has the shortest coastline of any of the non-landlocked Brazilian states at 66 km , and the capital, Teresina, is the only state capital in the north east to be located inland...

. The plural of sertão is sertões. The term "sertanejo" is similar to the generic use of "cowboy

Cowboy

A cowboy is an animal herder who tends cattle on ranches in North America, traditionally on horseback, and often performs a multitude of other ranch-related tasks. The historic American cowboy of the late 19th century arose from the vaquero traditions of northern Mexico and became a figure of...

" in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

Geographically, the sertão consists mainly of low uplands that form part of the Brazilian Highlands

Brazilian Highlands

The Brazilian Highlands or Brazilian Plateau are an extensive geographical region, covering most of the eastern, southern and central portions of Brazil, in all approximately half of the country's land area, or some 4,500,000 km²...

. Most parts of the sertão are between 200 and 500 meters above sea level, with higher elevations found on the eastern edge in the Planalto da Borborema, where it merges into a sub humid region known as agreste

Agreste

In Brazil, the agreste is a narrow zone in the states of Paraíba, Pernambuco, Alagoas, Sergipe and Bahia between the coastal forest zona da mata and the semiarid sertão...

, in the Serra da Ibiapaba in western Ceará

Ceará

Ceará is one of the 27 states of Brazil, located in the northeastern part of the country, on the Atlantic coast. It is currently the 8th largest Brazilian State by population and the 17th by area. It is also one of the main touristic destinations in Brazil. The state capital is the city of...

 and in the Serro do Periquito of central Pernambuco

Pernambuco

Pernambuco is a state of Brazil, located in the Northeast region of the country. To the north are the states of Paraíba and Ceará, to the west is Piauí, to the south are Alagoas and Bahia, and to the east is the Atlantic Ocean. There are about of beaches, some of the most beautiful in the...

. In the north, the sertão extends to the northern coastal plains of Rio Grande Do Norte state, whilst in the south it fades out in the northern fringe of Minas Gerais

Minas Gerais

Minas Gerais is one of the 26 states of Brazil, of which it is the second most populous, the third richest, and the fourth largest in area. Minas Gerais is the Brazilian state with the largest number of Presidents of Brazil, the current one, Dilma Rousseff, being one of them. The capital is the...

.

Two major rivers cross the sertão, the Rio Jaguaribe

Jaguaribe River

The Jaguaribe River is a highly seasonal river in Ceará state of northeastern Brazil. Two large dams were constructed across the Jaguaribe, the Orós Dam, completed in 1960, and the Castanhão Dam, completed in 2003. The Castanhão Dam flooded the city of Jaguaribara, which was rebuilt nearby as the...

 and the Rio Piranhas

Piranhas River

The Piranhas River, also known as the Açu River, is a river of northeastern Brazil. It originates in southeastern Paraíba state, near the border with Ceará, and flows north-northeast through Paraíba and Rio Grande do Norte states to empty into the Atlantic Ocean near Macau...

 further east. Apart from the Rio São Francisco

São Francisco River

The São Francisco is a river in Brazil. With a length of , it is the longest river that runs entirely in Brazilian territory, and the fourth longest in South America and overall in Brazil...

 which originates outside the region, other rivers dry out after the rainy periods end.

Climate and vegetation

Because the sertão lies close to the equator, temperatures remain nearly uniform throughout the year and are typically tropical, often extremely hot in the west.

However, the sertão is distinctive in its low rainfall compared to other areas of Brazil. Because of the relatively cool temperatures in the South Atlantic Ocean, the intertropical convergence zone

Intertropical Convergence Zone

The Intertropical Convergence Zone , known by sailors as The Doldrums, is the area encircling the earth near the equator where winds originating in the northern and southern hemispheres come together....

 remains north of the region for most of the year, so that most of the year is very dry.

Although annual rainfall averages between 500 and 800 millimeters over most of the sertão and 1300 millimeters on the northern coast at Fortaleza

Fortaleza

Fortaleza is the state capital of Ceará, located in Northeastern Brazil. With a population close to 2.5 million , Fortaleza is the 5th largest city in Brazil. It has an area of and one of the highest demographic densities in the country...

, it is confined to a short rainy season. This season extends from January to April in the west, but in the eastern sertão it generally occurs from March to June. However, rainfall is extremely erratic and in some years the rains are minimal, leading to catastrophic drought

Drought

A drought is an extended period of months or years when a region notes a deficiency in its water supply. Generally, this occurs when a region receives consistently below average precipitation. It can have a substantial impact on the ecosystem and agriculture of the affected region...

, whilst in others rains are extremely heavy and floods occur. This variability has caused extreme famines among subsistence farmers in the region, exacerbated by the extreme imbalance of land ownership throughout the sertão. The worst of these famines, between 1877 and 1879, was said to have killed over half the region's population.

In its natural state, the sertão was covered by a distinctive scrubby caatinga

Caatinga

Caatinga is a type of vegetation, and an ecoregion characterized by this vegetation in the northeastern part of Brazil. The name "Caatinga" is a Tupi word meaning "white forest" or "white vegetation"...

 vegetation, consisting generally of low thorny bushes adapted to the extreme climate. Several species of tree in the caatinga have become valuable horticultural plants, such as the cashew nut. Most of the sertão vegetation is now substantially degraded as a result of centuries of cattle ranching or clearing for cotton

Cotton

Cotton is a soft, fluffy staple fiber that grows in a boll, or protective capsule, around the seeds of cotton plants of the genus Gossypium. The fiber is almost pure cellulose. The botanical purpose of cotton fiber is to aid in seed dispersal....

 farming.

Parts of the sertão are recognized as a biodiversity

Biodiversity

Biodiversity is the degree of variation of life forms within a given ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems. Biodiversity is in part a function of climate. In terrestrial habitats, tropical regions are typically rich whereas polar regions...

hot-spot because of the unique flora.