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UPSC 2000: Assertion (A): The frequency of floods in North Indian plains has increased during the last couple of decades. Reason (R): There has been reduction in the depth of river valleys due to deposition of silt.
(a)Both A and R are true, and R is the correct explanation of A
(b)Both A and R are true, but R is not a correct explanation of A
(c)A is true, but R is false
(d)A is false, but R is true
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Not attemptedCorrect Answer: (a) Both A and R are true, and R is the correct explanation of A
Flood frequency in the north-Indian (Ganga) plains has risen in recent decades—Assertion A is true. Heavy silt deposition from Himalayan rivers raises river-beds, reduces channel depth and carrying capacity, and therefore directly promotes over-bank flooding, so Reason R is also true and provides the causal link. Hence R correctly explains A. ([focusias.in](https://focusias.in/upsc-general-studies-prelims-paper-2000/))
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Frequently Asked Questions
What is the correct answer to this UPSC 2000 Geography question?▼
The correct answer is option (a): Both A and R are true, and R is the correct explanation of A. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Indian Rivers & Water Resources question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2000, GS Paper 1, as Question 87. It falls under Geography > Indian Rivers & Water Resources.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Indian Rivers & Water Resources?▼
UPSC has asked 48 questions from Indian Rivers & Water Resources (under Geography) across multiple years. Visit the topic page to see the full list and year-wise trends.