31.8 - Comparison Table: φ-index vs W-index
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Practice Questions
Test your understanding with targeted questions
What does the φ-index measure?
💡 Hint: Think about how we assess rainfall contribution to runoff.
What does the W-index take into account that the φ-index does not?
💡 Hint: Recall the definition of initial abstraction.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does φ-index represent?
💡 Hint: Consider what we discussed about its definition.
The W-index accounts for initial losses. True or False?
💡 Hint: Remember the key difference between the two indices.
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Challenge Problems
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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.
💡 Hint: Use the formulas correctly and think about each component.
Design a scenario where using φ-index would mislead stormwater management in a town. Discuss the outcomes if W-index were used instead.
💡 Hint: Consider the importance of initial losses in real-world applications.
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