Nullah
A nullah or nala (
, 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 3 metres (10 ft) deep and 6 metres (20 ft) 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 floods.[1][2][3]
Canal
In
References
- ^ "Outdated stormwater system and encroached nullahs increase risk of 'urban flooding' in Pune". The Indian Express. 15 October 2020. Retrieved 2020-10-30.
- ^ "'Encroachment of nalas led to flooding in Hyderabad'". Telangana Today. 19 October 2020. Retrieved 2020-10-30.
- ^ "Illegal constructions, Nala encroachments led to floods in Karimnagar". The Siasat Daily. 21 August 2020. Retrieved 2020-10-30.
- ^ Wordie, Jason (January 20, 2008). "FYI: Why do some Hong Kong street names seem to have no connection to the area they are in?". South China Morning Post. p. 10. Retrieved January 8, 2014. (subscription required)
- Attribution
- This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Nullah". Encyclopædia Britannica (11th ed.). Cambridge University Press.
