20. Measurement of Evapotranspiration

Try these first

1. 1.

   Name two components of evapotranspiration.

   Hint

   Think about the two processes combined into ET.

2. 2.

   What is PET?

   Hint

   Consider what happens when water is unlimited.

3. 3.

   Which of the following best describes Actual Evapotranspiration?

   • Theoretical maximum water loss under ideal conditions
   • Measured water loss under existing conditions
   • The sum of evaporation and transpiration without restrictions

   Hint

   Consider what is actually measured in a field.

4. 4.

   Is Potential Evapotranspiration affected by limited water supply?

   • True
   • False

   Hint

   Think about what 'potential' means.

5. 5.

   Suppose you are tasked with designing an irrigation system for a region with average PET of 5 mm/day. What factors would you consider to estimate AET for different crops?

   Hint

   Think about both environmental conditions and crop types.

6. 6.

   How would you use technology to estimate ET for a large agricultural area without direct measurements? Outline a basic workflow.

   Hint

   Consider how data from different technologies come together.