20.4.3. Hargreaves Method

Try these first

1. 1.

   What does ET stand for in the Hargreaves equation?

   Hint

   Think about what water loss processes are involved.

2. 2.

   Which parameters are used in the Hargreaves Method?

   Hint

   Consider the variables needed for calculating water loss.

3. 3.

   What does the Hargreaves Method primarily use to estimate evapotranspiration?

   • Temperature and wind speed
   • Temperature and radiation
   • Just temperature

   Hint

   Think about what elements contribute to water loss in plants.

4. 4.

   True or False: The Hargreaves Method is considered more complex than the Penman Method.

   • True
   • False

   Hint

   Consider which method requires more inputs and calculations.

5. 5.

   If the average temperature last month was 30°C and Ra was 20 MJ/m²/day, calculate the ET using the Hargreaves Method. Discuss how changes in Ra would affect the result.

   Hint

   Revisit how the components affect evapotranspiration calculations.

6. 6.

   Compare the results of using the Hargreaves Method versus the Thornthwaite Method when given the same climatic data. What factors might lead to difference in outputs?

   Hint

   Recall how each method uses different parameters for its calculations.