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Moving Category:Urdu words and phrases to Category:Urdu-language words and phrases per Wikipedia:Categories for discussion/Speedy

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A '''nullah''' or '''nala''' ([[Hindustani language|Hindustani]] or "nallah" in [[Punjabi language|Punjabi]]) is an 'arm of the sea', [[stream]], or [[watercourse]], a steep narrow [[valley]]. Like the [[wadi]] of the [[Arabs]], the nullah is characteristic of mountainous or hilly country where there is little rainfall.

In the drier parts of [[India]] and [[Pakistan]], and in many parts of [[Australia]], there are small steep-sided valleys penetrating the hills, clothed with rough brushwood or small trees growing in the stony soil. During occasional heavy rains, torrents rush down the nullahs and quickly disappear. There is little local action upon the sides, while the bed is lowered, and consequently these valleys are narrow and steep. In cities on the [[Delhi]] plain in India, nullahs are concrete or brick-lined ditches about {{convert|3|m|0}} deep and {{convert|6|m}} wide, used to divert [[monsoon]] rain away from the cities.

Encroachment into nullahs is a significant problem in many South Asian cities, since it hampers the drainage of [[stormwater]] and can exacerbate [[Flood|floods]].<ref>{{Cite web|date=15 October 2020|title=Outdated stormwater system and encroached nullahs increase risk of ‘urban flooding’ in Pune|url=https://indianexpress.com/article/cities/pune/outdated-stormwater-system-and-encroached-nullahs-increase-risk-of-urban-flooding-in-pune-4890979/|access-date=2020-10-30|website=The Indian Express|language=en}}</ref><ref>{{Cite web|date=19 October 2020|title='Encroachment of nalas led to flooding in Hyderabad'|url=https://telanganatoday.com/encroachment-of-nalas-led-to-flooding-in-hyderabad|access-date=2020-10-30|website=Telangana Today|language=en}}</ref><ref>{{Cite web|date=21 August 2020|title=Illegal constructions, Nala encroachments led to floods in Karimnagar|url=https://www.siasat.com/illegal-constructions-nala-encroachments-led-to-floods-in-karimnagar-1953212/|access-date=2020-10-30|website=The Siasat Daily|language=en-GB}}</ref>

In [[East Asia]], a nullah ({{zh|c=明渠}}) refers to an open, usually concrete-lined [[channel (geography)|channel]] designed to allow rapid drainage of storm precipitation or industrial wastewater from high ground, to prevent flooding of urbanised coastal areas.<ref name=FYI>{{cite news|title=FYI: Why do some Hong Kong street names seem to have no connection to the area they are in?|url=http://www.scmp.com/article/623667/fyi-why-do-some-hong-kong-street-names-seem-have-no-connection-area-they-are|date=January 20, 2008|access-date=January 8, 2014|first=Jason|last=Wordie|page=10|newspaper=South China Morning Post}} '''{{subscription required}}'''</ref> It basically is a [[canal]] that is dry most of the time. One such example is the [[Kai Tak Nullah]] in [[Hong Kong]].

==References==
{{reflist}}
{{wiktionary}}
;Attribution
*{{1911|wstitle=Nullah}}

[[Category:Valleys]]
[[Category:Hindi words and phrases]]
[[Category:Geography of India]]
[[Category:Indian English idioms]]
[[Category:Water in India]]
[[Category:Urdu-language words and phrases]]

Nullah - Revision history

imported>JJMC89 bot III: Moving :Category:Urdu words and phrases to :Category:Urdu-language words and phrases per Wikipedia:Categories for discussion/Speedy