5.4.3. Rainfall Frequency

Try these first

1. 1.

   What does rainfall frequency measure?

   Hint

   Consider what probability means in weather contexts.

2. 2.

   What is a return period?

   Hint

   Think about how often something happens over time.

3. 3.

   What does rainfall frequency measure?

   • A. How often it rains
   • B. The probability of specific rain amounts
   • C. Average rainfall per year

   Hint

   Focus on what 'frequency' means in statistics.

4. 4.

   True or False: The Gumbel distribution is used for rainfall frequency analysis.

   • True
   • False

   Hint

   Recall our discussion on statistical methods.

5. 5.

   If a region experiences a rainfall event of 50 mm once every 5 years, what is the return period for this event?

   Hint

   Think how often does this rainfall happen?

6. 6.

   Analyze how using historical rainfall data errors could impact a city’s flood defense planning.

   Hint

   Consider what happens to infrastructure during severe weather.