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Saharan Flooded Grasslands
The Sudd (' or ', Dinka: Toc) is a vast swamp in South Sudan, formed by the White Nile's '' Baḥr al-Jabal'' section. The Arabic word ' is derived from ' (), meaning "barrier" or "obstruction". The term "the sudd" has come to refer to any large solid floating vegetation island or mat. The area which the swamp covers is one of the world's largest wetlands and the largest freshwater wetland in the Nile Basin. For many years the swamp, and especially its thicket of vegetation, proved an impenetrable barrier to navigation along the Nile. The ancient Egyptians failed to penetrate the Sudd and reach the areas south of it. In AD 61, a party of Roman soldiers sent by the Emperor Nero proceeded up the White Nile but were not able to get beyond the Sudd, which marked the limit of Roman penetration into equatorial Africa. For the same reasons in later times, the search for the source of the Nile was particularly difficult; it eventually involved overland expeditions from the central Afr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afrotropical Realm
The Afrotropical realm is one of Earth's eight biogeographic realms. It includes Africa south of the Sahara Desert, the majority of the Arabian Peninsula, the island of Madagascar, southern Iran and extreme southwestern Pakistan, and the islands of the western Indian Ocean. It was formerly known as the Ethiopian Zone or Ethiopian Region. Major ecological regions Most of the Afrotropic, with the exception of Africa's southern tip, has a tropical climate. A broad belt of deserts, including the Atlantic and Sahara deserts of northern Africa and the Arabian Desert of the Arabian Peninsula, separate the Afrotropic from the Palearctic realm, which includes northern Africa and temperate Eurasia. Sahel and Sudan South of the Sahara, two belts of tropical grassland and savanna run east and west across the continent, from the Atlantic Ocean to the Ethiopian Highlands. Immediately south of the Sahara lies the Sahel belt, a transitional zone of semi-arid short grassland and vachellia sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bahr El Ghazal River
The Bahr el Ghazal (; also spelled Bahr al Ghazal and Baḩr al Ghazāl) is a river in South Sudan. The South Sudanese region of Bahr el Ghazal takes its name from the river. The Bahr el Ghazal is the main western tributary of the Nile. It is long, flowing through the Sudd wetlands to Lake No, where it joins the White Nile. Hydrology The Bahr al Ghazal's drainage basin is the largest of any of the Nile's sub-basins, measuring 520,000 km (200,800 mi) in size, but it contributes a relatively small amount of water, about 2 m³/s (70 ft³/s) annually, due to tremendous volumes of water being lost in the Sudd wetlands. Seasonally, the river's discharge ranges from nothing to 48 m³/s (1,700 ft³/s). According to some sources, the river is formed by the confluence of the Jur River and Bahr al-Arab rivers. However other more recent sources say the river rises in the Sudd wetlands with no definitive source, that the Jur River joins at Lake Ambadi, and the Bahr al-A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malakal
Malakal is a city in South Sudan. It is the capital of Upper Nile State, South Sudan, along the White Nile River. It also serves as the headquarter of Malakal county and it used to be the headquarter of Upper Nile Region from 1970s to late 1990s. Geography The city of Malakal is located along the White Nile, in upper Nile state, South Sudan, close to the International borders with the Republic of Sudan and with Ethiopia.BritannicaJuba britannica.com, USA, accessed on July 7, 2019 The town is located on the banks of the White Nile, just north of its confluence with the Sobat River. This location lies approximately , by road, directly north of Juba, the capital of South Sudan and the largest city in that county. History Historically, Malakal was known as the former Sobat District which was then divided into Balliet and Akoka counties in the Eastern Bank of White Nile and Northern Sobat River. The Malakal town started as a tiny District administrative unit which later expanded i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Confluence
In geography, a confluence (also: ''conflux'') occurs where two or more flowing bodies of water join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river (main stem); or where two streams meet to become the source of a river of a new name (such as the confluence of the Monongahela and Allegheny rivers at Pittsburgh, forming the Ohio); or where two separated channels of a river (forming a river island) rejoin at the downstream end. Scientific study of confluences Confluences are studied in a variety of sciences. Hydrology studies the characteristic flow patterns of confluences and how they give rise to patterns of erosion, bars, and scour pools. The water flows and their consequences are often studied with mathematical models. Confluences are relevant to the distribution of living organisms (i.e., ecology) as well; "the general pattern ownstream of confluencesof increasing stream flow and decreasing s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sobat River
The Sobat River is a river of the Greater Upper Nile region in northeastern South Sudan, Africa. It is the most southerly of the great eastern tributaries of the White Nile, before the confluence with the Blue Nile. Geography The Sobat River is formed by the confluence of the west-flowing Baro River and the north-flowing Pibor River, on the border with Ethiopia. The river enters the White Nile at Doleib Hill, near the city of Malakal in Upper Nile State. When in flood the Sobat River produces an enormous discharge carrying a white sediment, which gives the White Nile its name. Hydrology The Sobat and its tributaries drain a watershed approximately in size. The river's mean annual discharge is 412 m³/s (14,550 ft³/s).; online aGoogle Books/ref> See also *List of rivers of South Sudan This is a list of streams and rivers in South Sudan, arranged geographically by drainage basin. There is an alphabetic list at the end of this article. The list may not be comprehe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mongalla, South Sudan
Mongalla or Mangalla is a Payam in Juba County, Central Equatoria State in South Sudan, on the east side of the Bahr al Jebel or White Nile river. It lies about 75 km by road northeast of Juba. The towns of Terekeka and Bor lie downstream, north of Mongalla. During the colonial era, Mongalla was capital of Mongalla Province, which reached south to Uganda and east towards Ethiopia. On 7 December 1917 the last of the northern Sudanese troops were withdrawn from Mongalla, replaced by Equatorial troops. These southern and at least nominally Christian troops remained the only permanent garrison of the town and province until their mutiny in August 1955. Mongalla and the surrounding province was then absorbed into Equatoria Province in 1956. The town was taken and retaken more than once during the Second Sudanese Civil War (1983–2005). An experimental station was established to grow sugar at Mongalla in the 1950s, and there were plans to establish commercial operations. Howe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmospheric Chemistry And Physics
''Atmospheric Chemistry and Physics'' is an open access peer-reviewed scientific journal published by the European Geosciences Union. It covers research on the Earth's atmosphere and the underlying chemical and physical processes, including the altitude range from the land and ocean surface up to the turbopause, including the troposphere, stratosphere, and mesosphere. The main subject areas comprise atmospheric modelling, field measurements, remote sensing, and laboratory studies of gases, aerosols, clouds and precipitation, isotopes, radiation, dynamics, and biosphere and hydrosphere interactions. Article types published are research and review articles, technical notes, and commentaries. The journal has a two-stage publication process. In the first stage, papers that pass a rapid access peer-review are immediately published on the ''Atmospheric Chemistry and Physics Discussions'' forum website. They are then subject to interactive public peer review, including the referees' comme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmospheric Methane
Atmospheric methane is the methane present in Earth's atmosphere. Atmospheric methane concentrations are of interest because it is one of the most potent greenhouse gases in Earth's atmosphere. Atmospheric methane is rising. The 20-year global warming potential of methane is 84. See Table 8.7. That is, over a 20-year period, it traps 84 times more heat per mass unit than carbon dioxide (CO2) and 105 times the effect when accounting for aerosol interactions. Global methane concentrations rose from 722 parts per billion (ppb) in pre-industrial times to 1895 ppb by 2021, an increase by a factor of 2.6 and the highest value in at least 800,000 years. Its concentration is higher in the Northern Hemisphere since most sources (both natural and human) are located on land and the Northern Hemisphere has more land mass. The concentrations vary seasonally, with, for example, a minimum in the northern tropics during April−May mainly due to removal by the hydroxyl radical. It rema ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Africa
West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, and Togo, as well as Saint Helena, Ascension and Tristan da Cunha ( United Kingdom Overseas Territory).Paul R. Masson, Catherine Anne Pattillo, "Monetary union in West Africa (ECOWAS): is it desirable and how could it be achieved?" (Introduction). International Monetary Fund, 2001. The population of West Africa is estimated at about million people as of , and at 381,981,000 as of 2017, of which 189,672,000 are female and 192,309,000 male. The region is demographically and economically one of the fastest growing on the African continent. Early history in West Africa included a number of prominent regional powers that dominated different parts of both the coastal and internal trade networks, suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nile
The Nile, , Bohairic , lg, Kiira , Nobiin language, Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the List of rivers by length, longest river in the world, though this has been contested by research suggesting that the Amazon River is slightly longer.Amazon Longer Than Nile River, Scientists Say Of the world's major rivers, the Nile is one of the smallest, as measured by annual flow in cubic metres of water. About long, its drainage basin covers eleven countries: the Democratic Republic of the Congo, Tanzania, Burundi, Rwanda, Uganda, Kenya, Ethiopia, Erit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographical Journal
''The Geographical Journal'' is a quarterly peer-reviewed academic journal of the Royal Geographical Society (with the Institute of British Geographers). It publishes papers covering research on all aspects of geography. It also publishes shorter Commentary papers and Review Essays. Since 2001, ''The Geographical Journal'' has been published in collaboration with Wiley-Blackwell Wiley-Blackwell is an international scientific, technical, medical, and scholarly publishing business of John Wiley & Sons. It was formed by the merger of John Wiley & Sons Global Scientific, Technical, and Medical business with Blackwell Publish .... The journal was established in 1831 as the '' Journal of the Royal Geographical Society of London''. Prior to 2000, ''The Geographical Journal'' published society news alongside articles and it continues to publish the proceedings of the society's annual general meeting and presidential address in the September issue. References External links * * So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
