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S@X 158 - TA | Fatality (Captain Falcon) Vs. Wadi (Mewtwo) SSB4 Grand Finals - Smash Wii U
S@X 158 - TA | Fatality (Captain Falcon) Vs. Wadi (Mewtwo) SSB4 Grand Finals - Smash Wii U
Published: 2016/07/22
Channel: VGBootCamp VoDs
Smash Con 2017 Smash 4 - EMG | Mistake (Bayonetta) vs. WaDi (Mewtwo) - Wii U WQ
Smash Con 2017 Smash 4 - EMG | Mistake (Bayonetta) vs. WaDi (Mewtwo) - Wii U WQ
Published: 2017/08/13
Channel: VGBootCamp VoDs
Smash 4 Wii U - ESAM (Pikachu) vs WaDi (Mewtwo) - SMASHADELPHIA 2017 Winners Semis
Smash 4 Wii U - ESAM (Pikachu) vs WaDi (Mewtwo) - SMASHADELPHIA 2017 Winners Semis
Published: 2017/06/26
Channel: CLASH Tournaments
Zehra : Wadi episod 5
Zehra : Wadi episod 5
Published: 2015/07/21
Channel: TV3MALAYSIA Official
Zehra : Wadi Episod 1
Zehra : Wadi Episod 1
Published: 2015/06/03
Channel: TV3MALAYSIA Official
ALL WATER SLIDES at Wild Wadi Dubai!
ALL WATER SLIDES at Wild Wadi Dubai!
Published: 2016/12/10
Channel: TUBERIDES
Wadi Rum, Jordan in 4K Ultra HD
Wadi Rum, Jordan in 4K Ultra HD
Published: 2017/04/28
Channel: Amazing Places on Our Planet
Smash Con 2017 Smash 4 - EMP | Wadi (Mewtwo) Vs. NRG | Nairo (ZSS) Wii U LQ
Smash Con 2017 Smash 4 - EMP | Wadi (Mewtwo) Vs. NRG | Nairo (ZSS) Wii U LQ
Published: 2017/08/14
Channel: VGBootCamp VoDs
Wadi
Wadi' al Yamani - Meryem Suresi (1-21) ve Meali ᴴᴰ
Published: 2015/10/05
Channel: SEÖ .::Kur`an ve Sünnet::.
S@X 5 Year - NRG | Nairo (ZSS) Vs. InC | Wadi (Mewtwo) - SSB4 Grand Finals - Smash 4 - Smash Wii U
S@X 5 Year - NRG | Nairo (ZSS) Vs. InC | Wadi (Mewtwo) - SSB4 Grand Finals - Smash 4 - Smash Wii U
Published: 2017/03/31
Channel: VGBootCamp VoDs
S@X 198 - InC | Wadi (Jigglypuff) Vs. VGBC | Pink Fresh (Link) - SSB4 Grand Finals - Smash Wii U
S@X 198 - InC | Wadi (Jigglypuff) Vs. VGBC | Pink Fresh (Link) - SSB4 Grand Finals - Smash Wii U
Published: 2017/05/06
Channel: VGBootCamp VoDs
مقطورة وادي الذئاب في الموسم الحادي عشر11 Trailer Wadi Diab 2016
مقطورة وادي الذئاب في الموسم الحادي عشر11 Trailer Wadi Diab 2016
Published: 2016/07/11
Channel: Marouane Hannover
Wadi | Premiere | Episode 13
Wadi | Premiere | Episode 13
Published: 2015/10/09
Channel: TV3MALAYSIA Official
Sourate Al-Baqara - Wadi
Sourate Al-Baqara - Wadi' Al Yemeni سورة البقرة ﻭﺩﻳﻊ ﺍﻟﻴﻤﻨﻲ
Published: 2016/12/18
Channel: RadioCoran
Babu Wadi Wadi
Babu Wadi Wadi
Published: 2015/10/09
Channel: Аноним channel
وادي الذئاب   الجزء الثامن   الحلقة 42   مدبلجة   HD  Wadi diab 8 ep 42
وادي الذئاب الجزء الثامن الحلقة 42 مدبلجة HD Wadi diab 8 ep 42
Published: 2015/06/17
Channel: Wadi Diab
مسلسل وادي الذئاب الجزء الحادي عشر الحلقة 01 wadi diab 11 ep 01 HD -
مسلسل وادي الذئاب الجزء الحادي عشر الحلقة 01 wadi diab 11 ep 01 HD -
Published: 2016/04/01
Channel: Chayth Hachfi
Wadi Dham - das verborgene Wadi (Oman) 2016
Wadi Dham - das verborgene Wadi (Oman) 2016
Published: 2016/04/06
Channel: Canyoningwolf
S@X 214 - Wadi (Mewtwo, Rob) Vs. InC | ZD (Fox) - SSB4 Grand Finals - Smash 4 - Smash for Wii U.
S@X 214 - Wadi (Mewtwo, Rob) Vs. InC | ZD (Fox) - SSB4 Grand Finals - Smash 4 - Smash for Wii U.
Published: 2017/08/19
Channel: VGBootCamp VoDs
Surah Al Baqara full by Wadi
Surah Al Baqara full by Wadi' Al Yamani
Published: 2016/12/08
Channel: One Ummah
Zehra : Wadi episod 4
Zehra : Wadi episod 4
Published: 2015/07/14
Channel: TV3MALAYSIA Official
Ezad ft RJ : Hati Mati ( OST Wadi )
Ezad ft RJ : Hati Mati ( OST Wadi )
Published: 2015/07/08
Channel: TV3MALAYSIA Official
Wadi | Premiere | episod 7
Wadi | Premiere | episod 7
Published: 2015/07/28
Channel: TV3MALAYSIA Official
Wadi e Jinn in  Madina Miracle of ALLAH
Wadi e Jinn in Madina Miracle of ALLAH
Published: 2014/02/10
Channel: amazingvdos
Zehra : Wadi Episod 2
Zehra : Wadi Episod 2
Published: 2015/06/08
Channel: TV3MALAYSIA Official
Smash Con 2017 Smash 4 - FOX MVG | MKLeo (Cloud) Vs. EMP | Wadi (Mewtwo) Wii U WS
Smash Con 2017 Smash 4 - FOX MVG | MKLeo (Cloud) Vs. EMP | Wadi (Mewtwo) Wii U WS
Published: 2017/08/14
Channel: VGBootCamp VoDs
Gog and Magog | Ustaz Wadi Annuar
Gog and Magog | Ustaz Wadi Annuar
Published: 2016/07/16
Channel: Abu Khadijah
Kothimbir Vadi Recipe |  Maharashtrian Kothimbir Wadi Recipe
Kothimbir Vadi Recipe | Maharashtrian Kothimbir Wadi Recipe
Published: 2012/10/01
Channel: Nisha Madhulika
Zehra: Wadi Episod 3
Zehra: Wadi Episod 3
Published: 2015/07/10
Channel: TV3MALAYSIA Official
Sambar Wadi
Sambar Wadi
Published: 2016/12/21
Channel: Sunita Ki Rasoi
WADI AL JINN IN MADINA
WADI AL JINN IN MADINA
Published: 2012/01/10
Channel: RA shid
Ustaz wadi anuar. Terbaru
Ustaz wadi anuar. Terbaru
Published: 2017/01/10
Channel: qaseh adawiyah
Nabi Musa TUMBUK Malaikat Maut ! | Ustaz Wadi Annuar
Nabi Musa TUMBUK Malaikat Maut ! | Ustaz Wadi Annuar
Published: 2017/09/28
Channel: Abu Khadijah
MENDEBARKAN!! Dimanakah Terletaknya Tempat Persembunyian Yakjuj Makjuj - Ustaz Wadi Anuar 2017
MENDEBARKAN!! Dimanakah Terletaknya Tempat Persembunyian Yakjuj Makjuj - Ustaz Wadi Anuar 2017
Published: 2017/08/19
Channel: Tanyalah Ustaz 2.0
wadi diab 10 ep 3+4
wadi diab 10 ep 3+4
Published: 2015/10/03
Channel: إثارة وأكثر
მშვიდობით !!! ,,, წადი .! იაგო კუპრეიშვილი ( iago kupreishvili - mshvidobit, wadi)
მშვიდობით !!! ,,, წადი .! იაგო კუპრეიშვილი ( iago kupreishvili - mshvidobit, wadi)
Published: 2013/06/04
Channel: iago kupreishvili Official
Nour Al-Houda - Ya Jarata al wadi with beautiful improvisations (kabh01)
Nour Al-Houda - Ya Jarata al wadi with beautiful improvisations (kabh01)
Published: 2013/01/12
Channel: hellokabh01
حصريا الحلقة 1+2 وادي الذئاب الجزء 11مترجم | wadi Diab 11 ep1-HD
حصريا الحلقة 1+2 وادي الذئاب الجزء 11مترجم | wadi Diab 11 ep1-HD
Published: 2015/12/26
Channel: TAriq ْ
Reality Of Wadi-E-Jin
Reality Of Wadi-E-Jin
Published: 2016/07/17
Channel: Jawad Arshad
Aloo Wadi | Sanjeev Kapoor Khazana
Aloo Wadi | Sanjeev Kapoor Khazana
Published: 2014/01/14
Channel: Sanjeev Kapoor Khazana
Zehra: Wadi Episod 4
Zehra: Wadi Episod 4
Published: 2015/07/10
Channel: TV3MALAYSIA Official
Wadi
Wadi' Al-Yamani - Surat Yusuf
Published: 2014/12/28
Channel: أحمد اللعبان
Wadi E Jin Ki Asal Haqeeqat Reality Of Wadi E Jin Saudi Arab
Wadi E Jin Ki Asal Haqeeqat Reality Of Wadi E Jin Saudi Arab
Published: 2016/11/23
Channel: the Irrelevant
Wadi Rum - A Majestic Landscape
Wadi Rum - A Majestic Landscape
Published: 2012/08/03
Channel: Visit Jordan
Angar Wadi Episode 1
Angar Wadi Episode 1
Published: 2017/07/07
Channel: Hi-Fi Urdu Channel
Wadi e Jinn Madina Me Jo Hai Uski Kya Haqeeqat Hai By Adv. Faiz Syed
Wadi e Jinn Madina Me Jo Hai Uski Kya Haqeeqat Hai By Adv. Faiz Syed
Published: 2015/09/19
Channel: IRC TV
Sourate Al Mulk - Wadi
Sourate Al Mulk - Wadi' Al Yemeni سورة الملك وديع اليمني
Published: 2014/09/13
Channel: RadioCoran
Meryem ( مَرْيَمَ ) Sûresi ve Meali - Wadi
Meryem ( مَرْيَمَ ) Sûresi ve Meali - Wadi' al Yamani & Nasser al Qatami ᴴᴰ
Published: 2016/05/02
Channel: SEÖ .::Kur`an ve Sünnet::.
Kothimbir Wadi - कोथिंबीर वडी | Maharashtrian Snack | Recipe by Archana in Marathi | Quick & Easy
Kothimbir Wadi - कोथिंबीर वडी | Maharashtrian Snack | Recipe by Archana in Marathi | Quick & Easy
Published: 2016/05/13
Channel: Ruchkar Mejwani
Hamaki - Wadi Haly Ma
Hamaki - Wadi Haly Ma'ak / حماقي - وآدي حالي معاك
Published: 2013/05/16
Channel: Mohamed Hamaki
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WIKIPEDIA ARTICLE

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Wadis in North-East Egypt
Wadi Bani Khalid, Sharqiyah region, Oman
Wadi in Nachal Pathe Negev, Israel.

Wadi (Arabic: وادي‎, translit. wādī‎, Hebrew: ואדיvādī)" is the Arabic and Hebrew term traditionally referring to a valley. In some instances, it may refer to a dry (ephemeral) riverbed that contains water only during times of heavy rain.

Etymology[edit]

Oued Tissint, Morocco

The term wādī is very widely found in Arabic toponyms.

Some Spanish toponyms are derived from Andalusian Arabic where wādī was used to mean a permanent river,[citation needed] for example: Guadalcanal from wādī al-Qanal = "river of refreshment stalls", Guadalajara from wādī al-hidjārah = "river of stones",[1] or Guadalquivir from al-wādī al-kabīr = "the great river". Seasonal streams, frequent in south-east Spain, are called ramblas instead.

Wadi is also a word commonly used in the Hindustani language (both Urdu and Hindi variants) to refer to a valley.

In the Maghreb, the term wadi (wad in Maghrebi Arabic, sometimes transcribed Oued) is applied to all rivers including regular ones.[citation needed]

General morphology and processes[edit]

Wadis are located on the gently sloping, nearly flat parts of deserts; commonly they begin on the distal portions of fans and extend to inland sabkhas or playas. In basin and range topography, wadis trend along basin axes at the terminus of fans. Permanent channels do not exist, due to lack of continual water flow. Wadi show braided stream patterns because of the deficiency of water and the abundance of sediments. Water percolates down into the stream bed causing abrupt loss in energy and resulting vast deposition. Wadis may develop dams of sediment which results in change of stream patterns in the next flash flood.

Wind also plays its role in deposition. When wadi sediments are underwater or moist, wind sediments are deposited over them. Thus wadi sediments contain both wind and water sediments.

Sediments and sedimentary structures[edit]

Wadi sediments may contain whole range from gravel to mud. There is also wide range of sedimentary structures. Thus, wadi sediments are most diagnostic of all other desert environments.

Flash floods represents severe energy conditions and results in wide range of sedimentary structures, including ripples and commonly plane beds. Gravels common display imbrications, Mud drapes show desiccation cracks. Wind activity also generates its own sedimentary structures, large scales cross-stratification and wedge shape cross-sets are present. Typical wadi sequence consists of alternating units of wind and water sediments; each unit range about 10–30 cm. Water laid sediments show complete fining upward sequence. Gravels show imbrication. Wind deposits are cross stratified and covered with mud-cracked deposits. Some horizontal Loess may also present.

Hydrological action[edit]

Modern English usage differentiates a wadi from another canyon or wash by the action and prevalence of water. Wadis, as drainage courses, are formed by water, but are distinguished from river valleys or gullies in that surface water is intermittent or ephemeral. Wadis are generally dry year round, except after a rain. The desert environment is characterized by sudden but infrequent heavy rainfall, often resulting in flash floods. Crossing wadis at certain times of the year can be dangerous as a result.

Wadis tend to be associated with centers of human population because sub-surface water is sometimes available in them. Nomadic and pastoral desert peoples will rely on seasonal vegetation found in wadis, even in regions as dry as the Sahara, as they travel in complex transhumance routes.

The centrality of wadis to water — and human life — in desert environments gave birth to the distinct sub-field of wadi hydrology in the 1990s.[2]

Deposits[edit]

Triassic wadi deposit near Ogmore-By-Sea, Wales. Clasts are Carboniferous Limestone.

Deposition in a wadi is rapid because of the sudden loss of stream velocity and seepage of water into the porous sediment. Wadi deposits are thus usually poorly sorted gravels and sands. These sediments are often reworked by eolian processes.[3]

Over time, wadi deposits may become "Inverted Wadis" where the presence at one time of underground water caused vegetation and sediment to fill in the wadi's eroded channel, to the point that previous washes appear as ridges running through desert regions.

See also[edit]

References[edit]

  1. ^ Ayuntamiento de Guadalajara, Guadalajara tourist guide, p.5., retrieved 17 August 2013
  2. ^ Review of Wheater, Howard ; Al Weshah, Radwan, Hydrology of Wadi systems -IHP Regional Network on Wadi Hydrology in the Arab Region, UNESCO- Technical documents in hydrology vol 55, SC.2002/WS/33,(2002).
  3. ^ Achite, Mohamed; Ouillon, Sylvain (September 2007). "Suspended sediment transport in a semiarid watershed, Wadi Abd, Algeria (1973–1995)". Journal of Hydrology. 343 (3-4): 187–202. doi:10.1016/j.jhydrol.2007.06.026. 

Bibliography[edit]

  • Summary: Drainage Courses, Wadis. United States Army Corps of Engineers. Desert Processes Working Group; Knowledge Sciences, Inc. (n.d), retrieved 2008-08-26.
  • Summary: Summary: Drainage Courses, Wadis - Inverted. United States Army Corps of Engineers. Desert Processes Working Group; Knowledge Sciences, Inc. (n.d), retrieved 2008-08-2onments
  • Gelennie, K. W., 1970 Deserts sedimentary Environments. Developments in Sedimentology, v.14. Elsevier, Amsterdam, 222p.

External links[edit]

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