11.7. Case Study Example (Illustrative)

Try these first

1. 1.

   What is a Double Mass Curve?

   Hint

   Think about how cumulative data can be compared visually.

2. 2.

   Why is a correction factor important?

   Hint

   Consider what happens when data changes.

3. 3.

   What indicates a correct and consistent Double Mass Curve?

   • A straight line
   • Curved line
   • Broken line

   Hint

   Think about how graphical representation shows trends.

4. 4.

   True or False: A change in slope in a Double Mass Curve always indicates data errors.

   • True
   • False

   Hint

   Consider the context of rainfall data.

5. 5.

   You have data showing a 20% increase in rainfall after a significant urban project changes the environment surrounding the rain gauge. How would you validate the accuracy of this data?

   Hint

   Think about how you can correlate data with environmental changes.

6. 6.

   If the slope before the adjustment is found to be 0.8 and after is 1.2, what correction factor would you apply to all records after the deviation?

   Hint

   Focus on the arithmetic relationship between the old and new slope.