Why is looking only at rainfall incomplete in flood risk analysis?
Answer and explanation
Correct answer: Because basin size, slope, sediment and tributaries also influence floods
Rainfall is important, but it alone does not determine flood risk. Basin size, slope, extra water brought by tributaries, sediment deposition in the channel, and drainage capacity affect runoff and river level. Therefore, option C is correct. Rainfall alone cannot show how quickly water will flow or how much water a river channel can hold. Exam tip: For flood-related answers, link rainfall with relief, river-system features, and sedimentation.
Frequently asked questions
What is the correct answer to this question?
Because basin size, slope, sediment and tributaries also influence floods
Why is this the correct answer?
Rainfall is important, but it alone does not determine flood risk. Basin size, slope, extra water brought by tributaries, sediment deposition in the channel, and drainage capacity affect runoff and river level. Therefore, option C is correct. Rainfall alone cannot show how quickly water will flow or how much water a river channel can hold. Exam tip: For flood-related answers, link rainfall with relief, river-system features, and sedimentation.
Which subject and chapter does this question cover?
This is a Class 9 Geography question. Chapter: Drainage. Topic: Drainage Systems in India.
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