9.1.4. Merits

Try these first

1. 1.

   What is the main advantage of using the Theissen Polygon Method?

   Hint

   Think about how straightforward the method is.

2. 2.

   In what type of catchment is the Theissen Polygon Method most useful?

   Hint

   Consider the size of areas where uniformity is more likely.

3. 3.

   Which of the following is NOT a merit of the Theissen Polygon Method?

   • Simplicity
   • Accuracy in high topography
   • Spatial variability

   Hint

   Think about what factors influence accuracy.

4. 4.

   True or False: The Theissen Polygon Method is best utilized in large catchments.

   • True
   • False

   Hint

   Reflect on the definition of small and medium catchments.

5. 5.

   A catchment area has five rain gauge observations at 8 mm, 10 mm, 12 mm, 14 mm, and 16 mm, covering respective areas of 1 km², 2 km², 3 km², 4 km², and 5 km². Calculate the area-weighted average rainfall.

   Hint

   Apply the weighted average formula based on area.

6. 6.

   Discuss how the Theissen Polygon Method could be adapted for use in a mountainous region where topography significantly influences rainfall.

   Hint

   Recall what influences rainfall beyond just flat areas.