The Sechura Desert is a coastal

desert A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About on ...

located south of the

Piura Region Piura () is a coastal department and region in northwestern Peru. The region's capital is Piura and its largest port cities, Paita and Talara, are also among the most important in Peru. The area is known for its tropical and dry beaches. It is ...

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

along the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

coast and inland to the foothills of the

Andes Mountains The Andes, Andes Mountains or Andean Mountains (; ) are the List of mountain ranges#Mountain ranges by length, longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range i ...

. Its extreme aridity is caused by the upwelling of cold coastal waters and

subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Geographical z ...

atmospheric

subsidence Subsidence is a general term for downward vertical movement of the Earth's surface, which can be caused by both natural processes and human activities. Subsidence involves little or no horizontal movement, which distinguishes it from slope move ...

, but it is also subject to occasional flooding during

El Niño El Niño (; ; ) is the warm phase of the El Niño–Southern Oscillation (ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (approximately between the International Date L ...

years. In 1728, the town of

Sechura Sechura is a city in northwestern Peru, south of Piura. It is the capital of Sechura Province in the Piura Region. The city lends its name to the Sechura Desert The Sechura Desert is a coastal desert located south of the Piura Region of Peru ...

was destroyed by a

tsunami A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explo ...

and was later rebuilt in its present location. In 1998,

runoff Runoff, run-off or RUNOFF may refer to: * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock market ...

from flooding rivers caused the formation of a temporary lake some long filling the Bayóvar Depression. Short rivers flowing across the desert from the Andes support intensive

irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow Crop, crops, Landscape plant, landscape plants, and Lawn, lawns. Irrigation has been a key aspect of agriculture for over 5,00 ...

-based agriculture.

Location and extent

Within Peru, the desert is described as the strip along the northern

Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the continen ...

coast of Peru in the southern

Piura Piura is a city in northwestern Peru located in the Sechura Desert on the Piura River. It is the capital of the Piura Region and the Piura Province. Its population was 484,475 as of 2017. It was here that Spanish Conqueror Francisco Pizarro fou ...

and western Lambayeque regions, and extending from the coast inland to the secondary ridges of the

. At its northern end near the city of

, the Sechura Desert transitions to the

Tumbes–Piura dry forests The Tumbes–Piura dry forests (NT0232) is an arid tropical ecoregion along the Pacific coasts of southern Ecuador and northern Peru. The ecoregion contains many endemic species of flora and birds adapted to the short wet season followed by a long ...

ecoregion. Including much of eastern Lambayeque Region, this habitat is composed of equatorial dry forests. The total area of the Sechura Desert is .

History

While a desert, the Sechura has been subject to flooding from rivers and to storms driven in from the Pacific Ocean. In 1728, a

generated from an

earthquake An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from ...

swept inland, destroying the town of

, then located closer to the water. Survivors moved inland and re-established the town in its current location. During ''

'' years, flooding in the desert regularly occurs. In 1998, the runoff from the flooding rivers poured into the coastal Sechura Desert. Where there had been nothing but arid, hardscrabble waste for 15 years, suddenly, the second-largest lake in Peru had developed: long, wide, and deep, with occasional parched domes of sand and clay poking up from the surface.

Climate

The Peruvian Desert has a low range of temperature changes due to the moderating effect of the nearby Pacific Ocean. Because of the upwelling of cold coastal waters and subtropical atmospheric subsidence, the desert is one of the most arid on Earth. Summer (December through March) is warm and sunny with temperatures above during the day, and temperatures that average over . In the winter (June through September) the weather is cool and cloudy with temperatures that vary from at night to during the day.

Geography

The Bayóvar Depression, which is the lowest point in Peru and all of the Southern Tropics, is located in this desert. The numerous short rivers that cross the Sechura supported

prehistoric Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of ...

indigenous Indigenous may refer to: *Indigenous peoples *Indigenous (ecology), presence in a region as the result of only natural processes, with no human intervention *Indigenous (band), an American blues-rock band *Indigenous (horse), a Hong Kong racehorse ...

human settlements for millennia. A number of urban cultures flourished here, including the Moche. The Moche survived on a diet of fish,

guinea pig The guinea pig or domestic guinea pig (''Cavia porcellus''), also known as the cavy or domestic cavy (), is a species of rodent belonging to the genus ''Cavia'' in the family Caviidae. Breeders tend to use the word ''cavy'' to describe the ani ...

camelids Camelids are members of the biological family Camelidae, the only currently living family in the suborder Tylopoda. The seven extant members of this group are: dromedary camels, Bactrian camels, wild Bactrian camels, llamas, alpacas, vicuñas, ...

squash Squash may refer to: Sports * Squash (sport), the high-speed racquet sport also known as squash racquets * Squash (professional wrestling), an extremely one-sided match in professional wrestling * Squash tennis, a game similar to squash but pla ...

, and

peanut The peanut (''Arachis hypogaea''), also known as the groundnut, goober (US), pindar (US) or monkey nut (UK), is a legume crop grown mainly for its edible Seed, seeds. It is widely grown in the tropics and subtropics, important to both small ...

s. The

Sican Culture The Sican (also Sicán) culture is the name that archaeologist Izumi Shimada gave to the culture that inhabited what is now the north coast of Peru between about 750 and 1375. According to Shimada, ''Sican'' means "temple of the Moon". The Sic ...

(''circa'' 800–1300 CE) succeeded the Moche, and developed refined techniques of

lost wax Lost-wax casting (also called "investment casting", "precision casting", or ''cire perdue'' which has been adopted into English from the French, ) is the process by which a duplicate metal sculpture (often silver, gold, brass, or bronze) is ...

goldsmithing. Today, the rivers support intensive

irrigated Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been devel ...

agriculture on the fertile

bottomlands A floodplain or flood plain or bottomlands is an area of land adjacent to a river which stretches from the banks of its channel to the base of the enclosing valley walls, and which experiences flooding during periods of high discharge.Goudi ...

. Two of Peru's five largest cities, including

and

Chiclayo Chiclayo (; qu, Chiklayu) is the principal city of the Lambayeque region in northern Peru. It is located inland from the Pacific coast and from the nation's capital, Lima. Founded by Spanish explorers as "Santa María de los Valles de Chiclay ...

, lie within the agricultural region in the north.

References

External links