13.5.1. General Form of IDF Equation

Try these first

1. 1.

   Define rainfall intensity.

   Hint

   Think about the unit used for measuring rain rate.

2. 2.

   What does the term 'return period' refer to?

   Hint

   Relate this to how frequently heavy rainfall occurs.

3. 3.

   What does the IDF equation predict?

   • Rainfall temperature
   • Rainfall intensity
   • Rainfall pressure

   Hint

   Focus on what aspect of rainfall the equation deals with.

4. 4.

   True or False: The empirical constants in the IDF equation are universally fixed.

   • True
   • False

   Hint

   Think about variability and local adaptations.

5. 5.

   You are given empirical constants K = 0.2, m = 0.7, C = 3, n = 1.5. Calculate the expected rainfall intensity for a return period of 5 years and a duration of 20 minutes.

   Hint

   Pay attention to the values and ensure correct substitutions.

6. 6.

   Discuss how changing climate patterns would necessitate updates to the empirical constants in the IDF equation.

   Hint

   Consider why historical data might not reflect future conditions accurately.