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easyQ. No. 14304-which-of-the-following-is-a-perennial-river-sustained-by-himalayan-snowmelt-and-monsoon-rainfall

Which of the following is a perennial river sustained by Himalayan snowmelt and monsoon rainfall?

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Linking a fact to its basin, location and defining characteristic is more useful than memorising a bare name. This approach supports direct MCQs, matching questions, map work and elimination-based reasoning. Option A (“Luni”) is incorrect because it does not match the river basin, lake type, location, tributary relationship, project or hydrological feature specified in the question. Option B (“Ghaggar”) is incorrect because it does not match the river basin, lake type, location, tributary relationship, project or hydrological feature specified in the question. Option D (“Banas”) is incorrect because it does not match the river basin, lake type, location, tributary relationship, project or hydrological feature specified in the question. The answer Ganga matches the exact hydrological and locational clue.

ALuni
BGhaggar
CGanga
DBanas
Correct Answer: GangaYour Answer: C

Explanation

Correct Answer: Option C — Ganga The Ganga is a perennial river because its Himalayan headstreams receive water from snow and glacier melt as well as monsoon rainfall. Although discharge changes seasonally, the river carries water throughout the year. Its headstream system begins with the Bhagirathi and Alaknanda, which meet at Devprayag. - Option A — Luni: The Luni is a seasonal river of arid western Rajasthan. - Option B — Ghaggar: The Ghaggar is rain-fed and seasonal, with flow weakening in Rajasthan. - Option D — Banas: The Banas is a monsoon-dependent river of Rajasthan and a tributary of the Chambal. Exam Takeaway: Ganga is perennial; Luni, Ghaggar and Banas are strongly seasonal.

Important Notes

  • Perennial rivers carry water throughout the year, although their discharge may rise during the monsoon and fall during the dry season.
  • Ganga receives snowmelt, glacier melt and rainfall through its Himalayan headstreams, giving it a more sustained flow than desert rivers.
  • Bhagirathi and Alaknanda meet at Devprayag to form the Ganga. This confluence is a common exam location.
  • Perennial should not be confused with constant discharge. Even the Ganga experiences major seasonal variation and flood peaks.
  • Luni, Ghaggar and Banas depend strongly on rainfall. Luni has inland drainage, Ghaggar fades in arid plains, and Banas joins Chambal.

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