7.4.1. Double Mass Curve Analysis

Try these first

1. 1.

   What is a double mass curve used for?

   Hint

   Think about how data consistency is important.

2. 2.

   Why is cumulative rainfall important in hydrology?

   Hint

   Consider what cumulative means.

3. 3.

   What does a double mass curve analyze?

   • Daily rainfall
   • Cumulative rainfall
   • Humidity

   Hint

   Think about what cumulative means in terms of data.

4. 4.

   True or False: A straight-line indication on a double mass curve suggests inconsistent data.

   • True
   • False

   Hint

   Consider what a break in the line suggests.

5. 5.

   Given a dataset of cumulative rainfall from two gauges, create double mass curves and interpret the results for consistency.

   Hint

   Look for any sudden shifts in your plotted curve.

6. 6.

   Analyze a historical dataset; identify periods with breaks in the double mass curve and hypothesize reasons for these discrepancies.

   Hint

   Consider all environmental impacts and human factors that could affect rainfall.