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Water Supply And Sanitation In Tunisia
Tunisia has achieved the highest access rates to water supply and sanitation services among the Middle East and North Africa. As of 2011, access to safe drinking water became close to universal approaching 100% in urban areas and 90% in rural areas. Tunisia provides good quality drinking water throughout the year. Responsibility for the water supply systems in urban areas and large rural centres is assigned to the ''Sociéte Nationale d'Exploitation et de Distribution des Eaux'' (SONEDE), a national water supply authority that is an autonomous public entity under the Ministry of Agriculture. Planning, design and supervision of small and medium water supplies in the remaining rural areas are the responsibility of the ''Direction Générale du Génie Rurale'' (DGGR). In 1974, ONAS was established to manage the sanitation sector. Since 1993, ONAS got the status of a main operator for protection of water environment and combating pollution. The rate of non-revenue water is the lowes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunisia
) , image_map = Tunisia location (orthographic projection).svg , map_caption = Location of Tunisia in northern Africa , image_map2 = , capital = Tunis , largest_city = capital , coordinates = , official_languages = Arabic Translation by the University of Bern: "Tunisia is a free State, independent and sovereign; its religion is the Islam, its language is Arabic, and its form is the Republic." , religion = , languages_type = Spoken languages , languages = Minority Dialects : Jerba Berber (Chelha) Matmata Berber Judeo-Tunisian Arabic (UNESCO CR) , languages2_type = Foreign languages , languages2 = , ethnic_groups = * 98% Arab * 2% Other , demonym = Tunisian , government_type = Unitary presidential republic , leader_title1 = President , leader_name1 = Kais Saied , leader_ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groundwater
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 freshwater 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, perma ... [...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] |
Oued Mliz
Wadi ( ar, وَادِي, wādī), alternatively ''wād'' ( ar, وَاد), North African Arabic Oued, is the Arabic term traditionally referring to a valley. In some instances, it may refer to a wet (ephemeral) riverbed that contains water only when heavy rain occurs. Etymology The term ' is very widely found in Arabic toponyms. Some Spanish toponyms are derived from Andalusian Arabic where ' was used to mean a permanent river, for example: Guadalcanal from ''wādī al-qanāl'' ( ar, وَادِي الْقَنَال, "river of refreshment stalls"), Guadalajara from ''wādī al-ḥijārah'' ( ar, وَادِي الْحِجَارَة, "river of stones"), or Guadalquivir, from ''al-wādī al-kabīr'' ( ar, اَلْوَادِي الْكَبِير, "the great river"). General morphology and processes Wadis are located on gently sloping, nearly flat parts of deserts; commonly they begin on the distal portions of alluvial fans and extend to inland sabkhas or dry lakes. In basin and ran ... [...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] |
Kerkennah
Kerkennah Islands ( aeb, قرقنة '; Ancient Greek: ''Κέρκιννα Cercinna''; Spanish:''Querquenes'') are a group of islands lying off the east coast of Tunisia in the Gulf of Gabès, at . The Islands are low-lying, being no more than above sea level. The main islands are Chergui and Gharbi. The archipelago has an area of and a population of 15,501 (2014). Kerkennah's main town, Remla (on Chergui), has a population of 2,000. The population of the islands significantly decreased during the 1980s due to drought. The islands were unable to provide suitable irrigation systems and, with clean water rapidly running out, many islanders were forced to leave for mainland Tunisia, the nearest city being Sfax. History The natives of Tunisia and Kerkennah originally settled there, but during the spread of the Roman Empire, Kerkennah was used as a port and look-out point by the Romans, to keep note of off-shore activity. In 2 BC, Augustus exiled Sempronius Gracchus, a lover o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Djerba
Djerba (; ar, جربة, Jirba, ; it, Meninge, Girba), also transliterated as Jerba or Jarbah, is a Tunisian island and the largest island of North Africa at , in the Gulf of Gabès, off the coast of Tunisia. It had a population of 139,544 at the 2004 census, which rose to 163,726 at the 2014 census. Citing the long and unique history of its Jewish minority in Djerba, Tunisia has sought UNESCO World Heritage status protections for the island. History Legend has it that Djerba was the island of the lotus-eaters where Odysseus was stranded on his voyage through the Mediterranean Sea. The island was called ''Meninx'' ( grc, Μῆνιγξ) until the third century AD. Strabo writes that there was an altar of Odysseus. The island was controlled twice by the Norman Kingdom of Sicily: in 1135–1158 and in 1284–1333. During the second of these periods it was organised as a feudal lordship, with the following Lords of Jerba: * 1284–1305: Roger I * 1305–1307, and 1307–1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desalination
Desalination is a process that takes away mineral components from saline water. More generally, desalination refers to the removal of salts and minerals from a target substance, as in Soil salinity control, soil desalination, which is an issue for agriculture. Saline water, Saltwater (especially Seawater, sea water) is desalinated to produce water suitable for Drinking water, human consumption or irrigation. The by-product of the desalination process is brine. Desalination is used on many seagoing ships and submarines. Most of the modern interest in desalination is focused on cost-effective provision of fresh water for human use. Along with recycled wastewater, it is one of the few rainfall-independent water resources. Due to its energy consumption, desalinating sea water is generally more costly than fresh water from surface water or groundwater, Reclaimed water, water recycling and water conservation. However, these alternatives are not always available and depletion of reserve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tubewell
A tube well is a type of water well in which a long, -wide, stainless steel tube or pipe is bored underground. The lower end is fitted with a strainer, and a pump lifts water for irrigation. The required depth of the well depends on the depth of the water table. History The tube well was invented by British hydrologist John Norton in the 1860's and patented. Versions of his tubewells were used during the British expedition to Abyssinia in 1868 to provide ground water for the advancing force. It proved so successful for the British that they became known as "Abyssinian wells" and were widely adopted in England and elsewhere for providing reliable water supplies Function Temporary reservoir A small reservoir of water is made at the outlet of the tube well. This reservoir is used for different usage of water by the local population. Casing The tube well casing houses the inlet, cylinder, piston valves and rising main of a "down-the-hole" type hand pump. Casing to suppor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC. The word ''dam'' can be traced back to Middle English, and before that, from Middle Dutch, as seen in the names of many old cities, such as Amsterdam and Rotterdam. History Ancient dams Early dam building took place in Mesopotamia and the Middle East. Dams were us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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