Assertion (A) : The frequency of floods in north Indian plains has increased during the last couple of decades. Reason (R) : There has been a reduction in the depth of river valleys due to deposition of silt.
✓ Correct answer: a) Both A and R are true and R is the correct explanation of A
ExplanationAssertion (A) is true : The frequency of floods in the north Indian plains has indeed risen in recent decades.This can be attributed to a combination of factors:Climate Change: With global warming, the frequency and intensity of rainfall events have increased.In many parts of India, especially in the north, monsoon rains have become more unpredictable, leading to sudden heavy downpours that overwhelm the drainage systems and flood the plains.Urbanization and Poor Drainage Systems: As more urban areas are developed, the natural landscape changes.Cities with poor drainage systems cannot handle heavy rainfall, leading to waterlogging and flooding.Deforestation: Deforestation, particularly in the catchment areas of rivers, reduces the land’s ability to absorb rainfall.The lack of tree cover and vegetation increases surface runoff, which can rapidly flow into rivers and cause them to overflow.River Management Issues: Rivers like the Ganges and Brahmaputra are heavily managed with embankments, dams, and other infrastructure.However, many of these structures have not been p
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