31.3.3. W min-index

Try these first

1. 1.

   What does the W min-index represent?

   Hint

   Think about rainfall events and their impact on soil.

2. 2.

   Why is the W min-index important for urban planning?

   Hint

   Consider the connections between runoff and drainage.

3. 3.

   What is the main purpose of the W min-index?

   • Estimate minimum runoff
   • Calculate average rainfall
   • Represent minimum infiltration rate

   Hint

   Think about what it measures.

4. 4.

   True or False: The W min-index accounts for initial losses.

   • True
   • False

   Hint

   Remember the differences between the two indices.

5. 5.

   A region experiences an intense rainfall of 120 mm, 50 mm of which results in runoff, with initial losses recorded at 15 mm. Calculate the W min-index and discuss the implications for urban design.

   Hint

   Follow the formula step by step.

6. 6.

   Discuss how variations in soil type might affect the W min-index in designing stormwater systems in contrasting areas.

   Hint

   Consider soil properties and their influence on water movement.