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Chott
In geology, a chott, shott, or shatt (; ar, شط, šaṭṭ, lit=bank, coast) is a salt lake in Africa's Maghreb that stays dry for much of the year but receives some water in the winter. The elevation of a chott surface is controlled by the position of the water table and capillary fringe, with sediment deflation occurring when the water table falls and sediment accumulation occurring when the water table rises.Swezey, C.S., 2003, The role of climate in the creation and destruction of continental stratigraphic records: An example from the northern margin of the Sahara Desert, in Cecil, C.B., and Edgar, N.T., eds., Climate Controls on Stratigraphy: SEPM (Society for Sedimentary Geology) Special Publication 77, p. 207-225. They are formed—within variable shores—by the spring thaw from the Atlas mountain range, along with occasional rainwater or groundwater sources in the Sahara, such as the Bas Saharan Basin. Water sources The chotts of the Sahara are fed intermittently ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nouakchott
, image_skyline = Nouakchott.jpg , image_caption = City view of Nouakchott , pushpin_map = Mauritania#Arab world#Africa , pushpin_relief = 1 , mapsize = , map_caption = Map of Mauritania showing Nouakchott , subdivision_type = Country , subdivision_name = , subdivision_type1 = Capital district , subdivision_name1 = Nouakchott , leader_title = Council president , leader_name = Fatimatou Abdel Malick , population_as_of = 2019 census , population_total = 1,195,600 , area_total_km2 = 1000 , population_density_km2 = auto , area_total_sq_mi = 400 , coordinates = , coordinates_footnotes = , elevation_m = 7 , elevation_ft = , website = , settlement_type = Capital city Nouakchott (; ; ar, نواكشوط; ber, label=Berber, itali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Djerid
el-Djerid, also al-Jarīd, ( ar, الجريد; Derja: ''Jerīd''; ) or more precisely the South Western Tunisia Region is a semi-desert natural region comprising three southern Tunisian Governorates, Gafsa, Kebili and Tozeur with adjacent parts of Algeria and Libya. Geography The region is characterised by bare pink hills with oases and several chotts (salt pans) such as Chott el Djerid in Tunisia. Economically the area is important for phosphate mining. Major towns include Gafsa and Tozeur. It remains the principal center of Ibāḍism in North Africa, with remaining Ibāḍī communities on Djerba in Tunisia, in the M'zab in Algeria, and in Jabal Nafusa in Libya. In medieval times, it often formed a politically separate entity under the control of Ibāḍī '' imams''. Location Jerid, Djerid'' or ''Bled el Djerid (Arabic : الجريد, literally "palm leaf"), is a semi-desert region situated in southwestern Tunisia, which extends to the contiguous areas of Alge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chott El Djerid
Chott el Djerid ( ar, شط الجريد ') also spelled ''Sciott Gerid'' and ''Shott el Jerid'', is a chott, a large endorheic salt lake in southern Tunisia. The name can be translated from the Arabic into English as "Lagoon of the Land of Palms". Geography The bottom of Chott el Djerid is located between 10 and 25 meters (about 30 to 80 feet) below sea level. The lake's width varies widely; at its narrowest point, it is only across, compared to its overall length of . At times, parts of it appear in various shades of white, green and purple. The narrow eastward inlet of the chott is also known as Chott el Fejej. It is the largest salt pan of the Sahara Desert, with a surface area of over 7,000 km2 (some sources state 5,000 km2). The site has a typical hot desert climate. Due to the harsh climate with mean annual rainfall of below 100 mm and daytime temperatures sometimes reaching 50 °C (122 °F) or more during summer with dense solar radiation, water ev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sahara Sea
The Sahara Sea was the name of a hypothetical macro-engineering project which proposed flooding endorheic basins in the Sahara Desert with waters from the Atlantic Ocean or Mediterranean Sea. The goal of this unrealized project was to create an inland sea that would cover the substantial areas of the Sahara Desert which lie below sea level, bringing humid air, rain, and agriculture deep into the desert. The possibility of such a project was raised several times by different scientists and engineers during the late 19th century and early 20th century. The concept of a flooded Sahara was also featured in novels of the time. History 19th century In 1877 the Scottish entrepreneur and abolitionist Donald Mackenzie was the first to propose the creation of a Sahara Sea. Mackenzie's idea was to cut a channel from one of the sand-barred lagoons north of Cape Juby, south to a large plain which Arab traders had identified to him as El Djouf. Mackenzie believed this vast region was up t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chott Melrhir
Chott Melrhir () also known as Chott Melghir or Chott Melhir is an endorheic chott-kind of salt lake in northeastern Algeria. It is the westernmost part of a series of depressions, which extend from the Gulf of Gabès into the Sahara. They were created between Miocene and Early Pleistocene as a result of compression accompanying the formation of the Atlas Mountains. With the maximum area of about , it is the largest lake in Algeria.В. М. Котляко�Мельгир (Chott Melrhir) Словарь современных географических названий (Dictionary of modern geographical names), 2003–2006 It lies almost entirely below sea level and contains the lowest point in Algeria, . Its size varies over the year and is usually larger than from east to west.Chott Melrhir Encyclopædia Britannica on-line< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sahara
, photo = Sahara real color.jpg , photo_caption = The Sahara taken by Apollo 17 astronauts, 1972 , map = , map_image = , location = , country = , country1 = , country2 = , country3 = , country4 = , country5 = , country6 = , country7 = , country8 = , country9 = , country10 = (disputed) , region = , state = , district = , city = , relief = , label = , label_position = , coordinates = , coordinates_ref = , elevation = , elevation_m = , elevation_ft = , elevation_ref = , length = , length_mi = , length_km = 4,800 , length_orientation = , length_note = , width = , width_mi = , width_ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Africa
Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area.Sayre, April Pulley (1999), ''Africa'', Twenty-First Century Books. . With billion people as of , it accounts for about of the world's human population. Africa's population is the youngest amongst all the continents; the median age in 2012 was 19.7, when the worldwide median age was 30.4. Despite a wide range of natural resources, Africa is the least wealthy continent per capita and second-least wealthy by total wealth, behind Oceania. Scholars have attributed this to different factors including geography, climate, tribalism, colonialism, the Cold War, neocolonialism, lack of democracy, and corruption. Despite this low concentration of wealth, recent economic expansion and the large and young population make Afric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maghreb
The Maghreb (; ar, الْمَغْرِب, al-Maghrib, lit=the west), also known as the Arab Maghreb ( ar, المغرب العربي) and Northwest Africa, is the western part of North Africa and the Arab world. The region includes Algeria, Libya, Mauritania (also considered part of West Africa), Morocco, and Tunisia. The Maghreb also includes the disputed territory of Western Sahara (controlled mostly by Morocco and partly by the Sahrawi Arab Democratic Republic) and the Spanish cities Ceuta and Melilla.Article 143. As of 2018, the region had a population of over 100 million people. Through the 18th and 19th centuries, English sources often referred to the region as the Barbary Coast or the Barbary States, a term derived from the demonym of the Berbers. Sometimes, the region is referred to as the Land of the Atlas, referring to the Atlas Mountains, which are located within it. The Maghreb is usually defined as encompassing much of the northern part of Africa, inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chott El Hodna
The ''Chott el Hodna'' ( ar, شط الحضنة) is a very shallow saline lake in Algeria. It is located within an endorheic basin in the Hodna region, towards the eastern end of the ''Hautes Plaines''. The ''Chott el Hodna'' includes seasonal brackish and saline pools and marshes, but the central zone of the lake is characterized by a complete absence of vegetation. J. Despois argues that the ''Chott el Hodna'' is not a proper '' Chott'', but a '' Sebkha''. Ecology The ''chott'' area provides an important habitat for certain endangered species such as the Cuvier's gazelle, the marbled duck and different kinds of bustards Bustards, including floricans and korhaans, are large, terrestrial birds living mainly in dry grassland areas and on the steppes of the Old World. They range in length from . They make up the family Otididae (, formerly known as Otidae). Bust ..., as well as indigenous fish species. The ''Chott el Hodna'' was declared a Ramsar site on 2 February 2001. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chott El Fejej
Chott el Fejej, also known as Chott el Fedjedj and Chott el Fejaj, is a long, narrow inlet of the endorheic salt lake Chott el Djerid in southern Tunisia. History and geography The bottom of Chott el Fejej lies below sea level and runs in a narrow path from the main body of Chott el Djerid to the Tunisian desert oasis of El Hamma, near the Gulf of Gabès on the Mediterranean Sea. The distance from the point where the Chott el Fejej joins the Chott el Djerid to its end near El Hamma is approximately . Along its length, Chott el Fejej never widens beyond and in many places is considerably more narrow. The easterly end of the Chott el Fejej is separated from Mediterranean by an approximately wide ridge of sand near El Hamma. It was this narrow sandy ridge, separating the Chott el Fejej from the Mediterranean Sea, which brought it to the attention of various geographers, engineers and diplomats. These figures looked to create an inland "Sahara Sea" by channelling the waters of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shatt Al-Arab
The Shatt al-Arab ( ar, شط العرب, lit=River of the Arabs; fa, اروندرود, Arvand Rud, lit=Swift River) is a river of some in length that is formed at the confluence of the Euphrates and Tigris rivers in the town of al-Qurnah in the Basra Governorate of southern Iraq. The southern end of the river constitutes the Iran–Iraq border down to its mouth, where it discharges into the Persian Gulf. The Shatt al-Arab varies in width from about at Basra to at its mouth. It is thought that the waterway formed relatively recently in geological time, with the Tigris and Euphrates originally emptying into the Persian Gulf via a channel further to the west. Kuwait's Bubiyan Island is part of the Shatt al-Arab delta. The Karun, a tributary which joins the waterway from the Iranian side, deposits large amounts of silt into the river; this necessitates continuous dredging to keep it navigable. The area used to hold the largest date palm forest in the world. In the mid-1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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