Oasis in the context of "Desert"

Bir Lehlou (also transliterated Bir Lahlou, Bir Lehlu Arabic: بئر الحلو) is an oasis town in north-eastern Western Sahara, 236 km from Smara, near the Mauritanian border and east of the border wall, in Polisario Front-held territory. It has a pharmacy, a school and a mosque. It is the head of the 5th military region of the Sahrawi Arab Democratic Republic and was the factual temporary capital of SADR until Tifariti became the temporary capital in 2008. It is also the name of a Daïra of the Wilaya of Smara, in the Sahrawi refugee camps.

The name "Bir Lehlou" is transcribed from Maghrebi Arabic, and means "the sweet (meaning palatable or non-salty) water well". The Modern Standard Arabic transcription would be "bir al Halū" (بئر الحلو).

Tifariti (Arabic: تيفاريتي) is an oasis town and the temporary capital of the Sahrawi Arab Democratic Republic, located in north-eastern Western Sahara, east of the Moroccan Berm, 138 km (86 mi) from Smara and 15 km (9 mi) north of the border with Mauritania. It is part of what Polisario Front calls the Liberated Territories and Morocco call the Buffer Zone. It has been the de facto temporary capital of the Sahrawi Arab Democratic Republic since the government moved there in 2008 from Bir Lehlou. It is the headquarters of the 2nd military region of the SADR.

It is also the name of a daïra of the wilaya of Smara, in the Sahrawi refugee camps.

Kashgar (Uyghur: قەشقەر, romanized: Qeshqer) or Kashi (Chinese: 喀什; pinyin: Kāshí) is a city in the Tarim Basin region of southern Xinjiang, China. It is one of the westernmost cities of China, located near the country's border with Kyrgyzstan and Tajikistan. For over 2,000 years, Kashgar has been a strategically important oasis on the Silk Road linking China with Central Asia, the Middle East, and Europe. It is one of the oldest continuously inhabited cities in the world and has a population of 711,300 people (as of 2019). Kashgar's urban area covers 15 km (5.8 sq mi), although its administrative area extends over 555 km (214 sq mi).

At the convergence point of widely varying cultures and empires, Kashgar has been under the rule of the Chinese, Turkic, Mongol and Tibetan empires. The city has also been the site of a number of battles between various groups of people on the steppes.

Groundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available fresh water in the world is groundwater. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table. Groundwater is recharged from the surface; it may discharge from the surface naturally at springs and seeps, and can form oases or wetlands. Groundwater is also often withdrawn for agricultural, municipal, and industrial use by constructing and operating extraction wells. The study of the distribution and movement of groundwater is hydrogeology, also called groundwater hydrology.

Typically, groundwater is thought of as water flowing through shallow aquifers, but, in the technical sense, it can also contain soil moisture, permafrost (frozen soil), immobile water in very low permeability bedrock, and deep geothermal or oil formation water. Groundwater is hypothesized to provide lubrication that can possibly influence the movement of faults. It is likely that much of Earth's subsurface contains some water, which may be mixed with other fluids in some instances.

Khwarazm or Chorasmia is a large oasis region on the Amu Darya river delta in western Central Asia, bordered on the north by the (former) Aral Sea, on the east by the Kyzylkum Desert, on the south by the Karakum Desert, and on the west by the Ustyurt Plateau. It was the center of the Iranian Khwarezmian civilization until the 9th century, when Turkic tribes moved into and ruled the lands. A series of kingdoms such as the Afrighid dynasty and the Anushtegin dynasty, whose capitals were (among others) Kath, Gurganj (now Konye-Urgench) and—from the 16th century on—Khiva. Today Khwarazm belongs partly to Uzbekistan and partly to Turkmenistan.

Trans-Saharan trade is trade between sub-Saharan Africa and North Africa that requires travel across the Sahara. Though this trade began in prehistoric times, the peak of trade extended from the 8th century until the early 17th century CE. The Sahara once had a different climate and environment. In Libya and Algeria, from at least 7000 BCE, pastoralism (the herding of sheep and goats), large settlements and pottery were present. Cattle were introduced to the Central Sahara (Ahaggar) between 4000 and 3500 BCE. Remarkable rock paintings (dated 3500 to 2500 BCE) in arid regions portray flora and fauna that are not present in the modern desert.

As a desert, the Sahara is now a hostile expanse that separates the Mediterranean economy from the economy of the Niger River Basin. As Fernand Braudel points out, crossing such a zone, especially without mechanized transport, is worthwhile only when exceptional circumstances cause the expected gain to outweigh the cost and the danger. Trade was conducted by caravans of camels. According to Maghrebi explorer Ibn Battuta, who once traveled with a caravan, an average one would amount to 1,000 camels, but some caravans were as large as 12,000. The caravans were guided by highly-paid Berbers, who knew the desert and could ensure protection from fellow desert nomads. The caravans' survival relied on careful coordination: runners would be sent ahead to oases for water to be shipped out to the caravan when it was still several days away, as the caravans could usually not carry enough to make the full journey. In the mid-14th century CE, Ibn Battuta crossed the desert from Sijilmasa via the salt mines at Taghaza to the oasis of Oualata. A guide was sent ahead, and water was brought over a four-day journey from Oualata to meet the caravan.

The Uyghurs, alternatively spelled Uighurs, Uygurs or Uigurs, are a Turkic ethnic group originating from and culturally affiliated with the general region of Central Asia and East Asia. The Uyghurs are recognized as the titular nationality of the Xinjiang Uyghur Autonomous Region in Northwest China. They are one of China's 55 officially recognized ethnic minorities.

The Uyghurs have traditionally inhabited a series of oases scattered across the Taklamakan Desert within the Tarim Basin. These oases historically functioned as independent states or came under the control of various civilizations, including Chinese, Mongol, Tibetan, and Turkic powers. The Uyghurs gradually started to become Islamized in the 10th century, and most Uyghurs identified as Muslims by the 16th century. Islam has since played an important role in Uyghur culture and identity.

The Siwa Oasis (Arabic: واحة سيوة Wāḥat Sīwah [ˈwæːħet ˈsiːwæ]) is an urban oasis in Egypt. It is situated between the Qattara Depression and the Great Sand Sea in the Western Desert, 50 kilometres (31 mi) east of the Egypt–Libya border and 560 kilometres (350 mi) from the Egyptian capital city of Cairo. It is famed from its role in ancient Egypt as the home to an oracle of Amun, the ruins of which are a popular tourist attraction, giving it the ancient name Oasis of Amun-Ra, after the major Egyptian deity.