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Oued Tiguiguest
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 r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18 Wadi Ghuweir Trail To Feynan - In The Oasis - Panoramio
Eighteen or 18 may refer to: * 18 (number), the natural number following 17 and preceding 19 * one of the years 18 BC, AD 18, 1918, 2018 Film, television and entertainment * ''18'' (film), a 1993 Taiwanese experimental film based on the short story ''God's Dice'' * ''Eighteen'' (film), a 2005 Canadian dramatic feature film * 18 (British Board of Film Classification), a film rating in the United Kingdom, also used in Ireland by the Irish Film Classification Office * 18 (''Dragon Ball''), a character in the ''Dragon Ball'' franchise * "Eighteen", a 2006 episode of the animated television series ''12 oz. Mouse'' Music Albums * ''18'' (Moby album), 2002 * ''18'' (Nana Kitade album), 2005 * '' 18...'', 2009 debut album by G.E.M. Songs * "18" (5 Seconds of Summer song), from their 2014 eponymous debut album * "18" (One Direction song), from their 2014 studio album ''Four'' * "18", by Anarbor from their 2013 studio album ''Burnout'' * "I'm Eighteen", by Alice Cooper commonly re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flash Flood
A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and depressions. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, or tropical storm, or by meltwater from ice or snow flowing over ice sheets or snowfields. Flash floods may also occur after the collapse of a natural ice or debris dam, or a human structure such as a man-made dam, as occurred before the Johnstown Flood of 1889. Flash floods are distinguished from regular floods by having a timescale of fewer than six hours between rainfall and the onset of flooding. Flash floods are a significant hazard, causing more fatalities in the U.S. in an average year than lightning, tornadoes, or hurricanes. Flash floods can also deposit large quantities of sediments on floodplains and can be destructive of vegetation cover not adapted to frequent flood conditions. Causes Flash floods most often occur in dry areas that have recently received precipitation, but th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ash-Sharqiyyah Region, Oman
Ash-Sharqiyyah Region ( ar, ٱلْمِنْطَقَة ٱلشَّرْقِيَّة, Al-Minṭaqah Ash-Sharqiyyah, lit=The Eastern Region) was the eastern '' minṭaqah'' (region) of the Sultanate of Oman. The capital of Ash-Sharqiyyah is Sur. On 28 October 2011 Ash Sharqiyah Region was split into Ash Sharqiyah North Governorate and Ash Sharqiyah South Governorate. Ash Sharqiyah Region consisted of eleven provinces ('' Wilāyāt''): Sur, Ibra, Al-Mudhaibi, Al-Kamil Wal-Wafi, Jalan Bani Bu Hassan, Jalan Bani Bu Ali, Wadi Bani Khalid, Dema Wa Thaieen, Bidiya, Al Qabil, and Massirah. The main cities are Sur and Ibra. History Archaeology In November 2019, 45 well-preserved tombs covering a 50-80 square metre area and a settlement, dating back to beginning of the Iron Age, were discovered in Al-Mudhaibi by archaeologists from Oman and Heidelberg University. Archaeologists believed that the site belonged to the miners who were working in copper mining. Ecology Of particular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ash Sharqiyah North Governorate
Ash Sharqiyah North Governorate ( ar, مُحَافَظَة شَمَال ٱلشَّرْقِيَّة, Muḥāfaẓat Šamāl aš-Šarqīyah, English: Northeastern Governorate) is a governorate of Oman. It was created on 28 October 2011, when Ash Sharqiyah Region was split into Ash Sharqiyah North Governorate and Ash Sharqiyah South Governorate. The centre of the governorate is the '' wilāyah'' (province) of Ibra. Provinces Ash-Sharqiyah North Governorate consists of six ''wilāyāt'': * Al-Qabil ( ar, ٱلْقَابِل), population (2017): 23,824 * Al-Mudhaibi ( ar, المضيبي), population (2017): 117,691 * Bidiya ( ar, بدية), population (2017): 40,812 * Dema Wa Thaieen ( ar, دماء والطائيين), population (2017): 26,817 * Ibra ( ar, إبراء), population (2017): 57,561 * Wadi Bani Khalid, population (2017): 12,518 Demographics See also * Eastern Arabia Eastern Arabia, historically known as al-Baḥrayn ( ar, البحرين) until the 18th century, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wadi Bani Khalid
''Wilāyat Wādī Banī Khālid'' ( ar, وِلَايَة وَادِي بَنِي خَالِد) is a '' Wilāyah'' (Province) in the Northern Governorate of the Eastern Region of Oman. Located about from Muscat, and from Sur, the province has a wadi which serves as a destination for tourists, that is ''Wādī Banī Khālid'' ( ar, وَادِي بَنِي خَالِد). The wadi Wadi Bani Khalid is one of the best-known wadis in the Sultanate of Oman. Its stream maintains a constant flow of water throughout the year. Large pools of water and boulders are scattered along the course of the wadi. As a geographical area, the wadi covers a large swathe of lowland and the Hajar Mountains. ''Kuhūf'' form some of the features of this wadi. These include ''Kahf Maqal'' (), which was described as an "underground chamber" of the Sultanate of Oman, or the ''akthar'' (, 'best') out of 4,000 caves. '' Aflāj'' (underground canals) or ''ʿUyūn'' are also common in this wadi, including ''ʿ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Hydrology
''Journal of Hydrology'' () is a peer-reviewed academic journal published by Elsevier Elsevier () is a Dutch academic publishing company specializing in scientific, technical, and medical content. Its products include journals such as '' The Lancet'', '' Cell'', the ScienceDirect collection of electronic journals, '' Trends'', ... about hydrological sciences including water based management and related policy issues. External links * Hydrology journals Elsevier academic journals {{Hydrology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eolianite
Eolianite or aeolianite is any rock formed by the lithification of sediment deposited by aeolian processes; that is, the wind. In common use, however, the term refers specifically to the most common form of eolianite: coastal limestone consisting of carbonate sediment of shallow marine biogenic origin, formed into coastal dunes by the wind, and subsequently lithified. It is also known as kurkar in the Middle East, miliolite in India and Arabia, and grès dunaire in the eastern Mediterranean. eolianite has a hardness of 4.3 and is very dull. Streak is light brown. Description Sayles coined the term in 1931, when he described the dune-shaped hills of Bermuda, consisting of bioclastic grainstones. Thus, Bermuda is considered the type locality for carbonate eolianite facies, with clearly defined cross-bedding, foresets, and topsets. Deposition is controlled by glacio-eustatic changes, with eolianites forming during interglaciations. Eolianites occur along the margins of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velocity
Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time (e.g. northbound). Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies. Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value ( magnitude) of velocity is called , being a coherent derived unit whose quantity is measured in the SI ( metric system) as metres per second (m/s or m⋅s−1). For example, "5 metres per second" is a scalar, whereas "5 metres per second east" is a vector. If there is a change in speed, direction or both, then the object is said to be undergoing an ''acceleration''. Constant velocity vs acceleration To have a ''constant velocity'', an object must have a constant speed in a constant direction. Constant dire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transhumance
Transhumance is a type of pastoralism or nomadism, a seasonal movement of livestock between fixed summer and winter pastures. In montane regions (''vertical transhumance''), it implies movement between higher pastures in summer and lower valleys in winter. Herders have a permanent home, typically in valleys. Generally only the herds travel, with a certain number of people necessary to tend them, while the main population stays at the base. In contrast, ''horizontal transhumance'' is more susceptible to being disrupted by climatic, economic, or political change. Traditional or fixed transhumance has occurred throughout the inhabited world, particularly Europe and western Asia. It is often important to pastoralist societies, as the dairy products of transhumance flocks and herds (milk, butter, yogurt and cheese) may form much of the diet of such populations. In many languages there are words for the higher summer pastures, and frequently these words have been used as plac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sahara
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Arroyo (creek)
An arroyo (; from Spanish arroyo , "brook"), also called a wash, is a dry creek, stream bed or gulch that temporarily or seasonally fills and flows after sufficient rain. Flash floods are common in arroyos following thunderstorms. '' Wadi'' (Arabic) is used in North Africa and Western Asia for similar landforms. The desert dry wash biome is restricted to the arroyos of the southwestern United States. Arroyos provide a water source to desert animals. Types and processes Arroyos can be natural fluvial landforms or constructed flood control channels. The term usually applies to a sloped or mountainous terrain in xeric and desert climates. In addition: in many rural communities arroyos are also the principal transportation routes; and in many urban communities arroyos are also parks and recreational locations, often with linear multi-use bicycle, pedestrian, and equestrian trails. Flash flooding can cause the deep arroyos or deposition of sediment on flooded lands. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canyons
A canyon (from ; archaic British English spelling: ''cañon''), or gorge, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Rivers have a natural tendency to cut through underlying surfaces, eventually wearing away rock layers as sediments are removed downstream. A river bed will gradually reach a baseline elevation, which is the same elevation as the body of water into which the river drains. The processes of weathering and erosion will form canyons when the river's headwaters and estuary are at significantly different elevations, particularly through regions where softer rock layers are intermingled with harder layers more resistant to weathering. A canyon may also refer to a rift between two mountain peaks, such as those in ranges including the Rocky Mountains, the Alps, the Himalayas or the Andes. Usually, a river or stream carves out such splits between mountains. Examples of mountain-type c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
