Practice Comparison Table: Φ-index Vs W-index (31.8)

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8 questions

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6 sample questions

Question 1.
What does the φ-index measure?
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Think about how we assess rainfall contribution to runoff.
Question 2.
What does the W-index take into account that the φ-index does not?
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Recall the definition of initial abstraction.
3Question 3.
What does φ-index represent?
- Initial losses
- Average rate of infiltration
- Total runoff
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Consider what we discussed about its definition.
4Question 4.
The W-index accounts for initial losses. True or False?
- True
- False
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Remember the key difference between the two indices.
Question 5.
Given a storm event with 150mm of rainfall, where 90mm of runoff was recorded and initial losses measured to be 30mm, calculate both the φ-index and W-index.
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Use the formulas correctly and think about each component.
Question 6.
Design a scenario where using φ-index would mislead stormwater management in a town. Discuss the outcomes if W-index were used instead.
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Consider the importance of initial losses in real-world applications.

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