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Aghlabid Reservoirs
The Aghlabid Basins or Aghlabid Reservoirs are a series of historic water Reservoir, reservoirs and hydraulic works in Kairouan, Tunisia. They were built under Aghlabids, Aghlabid rule in the 9th century to supply the city with water. Historical background Kairouan, founded by the Muslim conquest of the Maghreb, Arab-Muslim conquerors in 670, is located in the middle of an arid steppe. Unlike most major towns of the era, it was not near a river or other abundant source of water, which meant that the provision of water was a perennial concern. According to the 11th-century Al-Andalus, Andalusi geographer al-Bakri, the Umayyad Caliphate, Umayyad caliph Hisham ibn Abd al-Malik, Hisham (r. 724–743) ordered the construction of 15 water reservoirs outside Kairouan, but these have not survived to the present day. In the 9th century, when Kairouan was the center of the Aghlabid Emirate, which governed the region nominally on behalf of the Abbasid Caliphate, Abbasid Caliphs, the Aghlabi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reservoir
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, through excavation, or building any number of retaining walls or levees. In other contexts, "reservoirs" may refer to storage spaces for various fluids; they may hold liquids or gasses, including hydrocarbons. ''Tank reservoirs'' store these in ground-level, elevated, or buried tanks. Tank reservoirs for water are also called cisterns. Most underground reservoirs are used to store liquids, principally either water or petroleum. Types Dammed valleys Dammed reservoirs are artificial lakes created and controlled by a dam A dam is a barrier that stops or restricts the flow of surface water or underground streams ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drought
A drought is defined as drier than normal conditions.Douville, H., K. Raghavan, J. Renwick, R.P. Allan, P.A. Arias, M. Barlow, R. Cerezo-Mota, A. Cherchi, T.Y. Gan, J. Gergis, D. Jiang, A. Khan, W. Pokam Mba, D. Rosenfeld, J. Tierney, and O. Zolina, 2021Water Cycle Changes In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 1055–1210, doi:10.1017/9781009157896.010. This means that a drought is "a moisture deficit relative to the average water availability at a given location and season". A drought can last for days, months or years. Drought ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tributaries
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage basin of its surface water and groundwater, leading the water out into an ocean. The Irtysh is a chief tributary of the Ob river and is also the longest tributary river in the world with a length of . The Madeira River is the largest tributary river by volume in the world with an average discharge of . A confluence, where two or more bodies of water meet, usually refers to the joining of tributaries. The opposite to a tributary is a distributary, a river or stream that branches off from and flows away from the main stream. PhysicalGeography.net, Michael Pidwirny & Scott ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oued Merguellil
Oued Merguellil (وادي مرق الليل) is a stream in central Tunisia that flows via Sebkhet Cherita Lake, into the Mediterranean at the Gulf of Hammamet. Oued Merguellil is found at 35° 50′ 34″ N, 10° 16′ 18″ E in central Tunisia. The stream flow is irregular with a variation of 300mm through the year in the catchment basin. During Roman times the area was intensely farmed and today irrigation from the stream goes to olive and apricot production. The El Haouareb Dam is on the stream. History Traces of human presence dating back to the Lower Paleolithic were found in the basin of the river Merguellil and demonstrate the antiquity of the settlement of the area by nomads. Upon arrival, the Romans, became the first sedentary occupants, settled mainly in areas rich in water from the upstream reservoir, more development of housing and of agriculture and where various relics were found. They used techniques for using runoff water, including the construction of wate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pont Aqueduc Sur L'oued Cherchira Et Réservoir Voisin
Pont, meaning "bridge" in French, may refer to: Places France * Pont, Côte-d'Or, in the Côte-d'Or ''département'' * Pont-Bellanger, in the Calvados ''département'' * Pont-d'Ouilly, in the Calvados ''département'' * Pont-Farcy, in the Calvados ''département'' * Pont-l'Évêque, Calvados, in the Calvados ''département'' * Pont-l'Évêque, Oise, in the Oise ''département'' Elsewhere * Pont, Cornwall, England * Pontarddulais, Swansea, Wales * Pontypridd, Rhondda Cynon Taf, Wales * in Ponteland, Northumberland * Du Pont, Switzerland, in the commune of L'Abbaye, Switzerland Other * Pont (surname) * Pont (Haiti), a political party led by Jean Marie Chérestal * Pont Rouelle, a bridge in Paris, France * Du Pont family * Graham Laidler (1908–1940), British cartoonist, "Pont" of ''Punch'' magazine * PONT, time zone abbreviation for Ponape Time (Micronesia), UTC+11:00 See also * Dupont (surname) * DuPont, the company * Dupont (other) DuPont de Nemours, Inc., ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corbel
In architecture, a corbel is a structural piece of stone, wood or metal jutting from a wall to carry a superincumbent weight, a type of bracket. A corbel is a solid piece of material in the wall, whereas a console is a piece applied to the structure. A piece of timber projecting in the same way was called a "tassel" or a "bragger" in England. The technique of corbelling, where rows of corbels deeply keyed inside a wall support a projecting wall or parapet, has been used since Neolithic (New Stone Age) times. It is common in medieval architecture and in the Scottish baronial style as well as in the vocabulary of classical architecture, such as the modillions of a Corinthian cornice. The corbel arch and corbel vault use the technique systematically to make openings in walls and to form ceilings. These are found in the early architecture of most cultures, from Eurasia to Pre-Columbian architecture. A console is more specifically an "S"-shaped scroll bracket in the classic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georges Marçais
Georges Marçais ( Rennes, 11 March 1876 – Paris, 20 May 1962) was a French orientalist, historian, and scholar of Islamic art and architecture who specialized in the architecture of North Africa. Biography He initially trained as a painter and writer but after visiting his brother, William Marçais (1872–1956), an orientalist who directed a school in Algeria, he turned instead to scholarly studies. After writing his thesis on Berbers in North Africa, he was a professor at the University of Algiers (1919–44; during the French occupation of Algeria) and wrote numerous books and articles. Academic contributions One of his main overall contributions to the scholarly study of Islamic art/architecture was to highlight the architecture of the western Islamic world – the Maghreb and Al-Andalus Al-Andalus translit. ; an, al-Andalus; ast, al-Ándalus; eu, al-Andalus; ber, ⴰⵏⴷⴰⵍⵓⵙ, label= Berber, translit=Andalus; ca, al-Àndalus; gl, al-Andalus; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rubble Stone
Rubble stone is rough, uneven building stone not laid in regular courses. It may fill the core of a wall which is faced with unit masonry such as brick or ashlar. Analogously, some medieval cathedral walls are outer shells of ashlar with an inner backfill of mortarless rubble and dirt. Square Rubble Masonry Square Rubble Masonry is where face stones are dressed (squared on all joints and beds) before laying, set in Mortar (masonry), mortar and appear as the outer surface of a wall. History The sack masonry is born as an evolution of Levee, embankment covered with boards, stones or bricks. The coating was used to give the embankment greater strength and make it more difficult for the enemies to climb. The Sadd el-Kafara, Sadd el-Khafara dam, 14 meters high and built in sacking masonry in Wadi Al-Garawi near Helwan in Egypt, dates back to 2900 - 2600 BC The Greeks called the brickwork emplekton, emplecton and made use of it in particular in the construction of the defensive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Purification
Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption (drinking water), but water purification may also be carried out for a variety of other purposes, including medical, pharmacological, chemical, and industrial applications. The history of water purification includes a wide variety of methods. The methods used include physical processes such as filtration, sedimentation, and distillation; biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light. Water purification can reduce the concentration of particulate matter including suspended particles, parasites, bacteria, algae, viruses, and fungi as well as reduce the concentration of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Settling Tank
Settling is the process by which particulates move towards the bottom of a liquid and form a sediment. Particles that experience a force, either due to gravity or due to centrifugal motion will tend to move in a uniform manner in the direction exerted by that force. For gravity settling, this means that the particles will tend to fall to the bottom of the vessel, forming sludge or slurry at the vessel base. Settling is an important operation in many applications, such as mining, wastewater and drinking water treatment, biological science, space propellant reignition, and scooping. Physics For settling particles that are considered individually, i.e. dilute particle solutions, there are two main forces enacting upon any particle. The primary force is an applied force, such as gravity, and a drag force that is due to the motion of the particle through the fluid. The applied force is usually not affected by the particle's velocity, whereas the drag force is a function of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medina Quarter
A medina (from ar, مدينة, translit=madīnah, lit=city) is a historical district in a number of North African cities, often corresponding to an old walled city. The term comes from the Arabic word simply meaning "city" or "town". Historical background Prior to the rise and intrusion of European colonial rule in North Africa, the region was home to many major cities which had long been centres of culture, commerce, and political power over many centuries. In Algeria, the French conquest that began in 1830 and brought the country under colonial control resulted in significant destruction of the urban fabric of its historic cities. Colonial rule also led to the dismantling of many traditional urban institutions, the disruption of local culture, and even a certain level of depopulation over time. Fewer cities have preserved their pre-colonial urban fabric in Algeria by comparison with neighbouring countries, but significant remains have been preserved in historic cities suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Grande Festkiya De Kairouan - Tunisia
LA most frequently refers to Los Angeles, the second largest city in the United States. La, LA, or L.A. may also refer to: Arts and entertainment Music * La (musical note), or A, the sixth note * "L.A.", a song by Elliott Smith on ''Figure 8'' (album) * ''L.A.'' (EP), by Teddy Thompson * ''L.A. (Light Album)'', a Beach Boys album * "L.A." (Neil Young song), 1973 * The La's, an English rock band * L.A. Reid, a prominent music producer * Yung L.A., a rapper * Lady A, an American country music trio * "L.A." (Amy Macdonald song), 2007 * "La", a song by Australian-Israeli singer-songwriter Old Man River Other media * l(a, a poem by E. E. Cummings * La (Tarzan), fictional queen of the lost city of Opar (Tarzan) * ''Lá'', later known as Lá Nua, an Irish language newspaper * La7, an Italian television channel * LucasArts, an American video game developer and publisher * Liber Annuus, academic journal Business, organizations, and government agencies * L.A. Screenings, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
