16.6. Evapotranspiration

Try these first

1. 1.

   Define evapotranspiration.

   Hint

   Consider the two processes it combines.

2. 2.

   What does PET stand for?

   Hint

   Think of what this term indicates about conditions.

3. 3.

   What is the main difference between PET and AET?

   • PET is theoretical; AET is observed
   • Both are the same
   • AET is theoretical; PET is observed

   Hint

   Think about what each term signifies.

4. 4.

   True or False: Evapotranspiration includes both evaporation from soil and transpiration from plants.

   • True
   • False

   Hint

   Consider what the term implies.

5. 5.

   Calculate the AET if the PET is 5 mm and observed conditions in the field allow only 3 mm of moisture to evaporate.

   Hint

   Consider what each term means in practical terms.

6. 6.

   Discuss the implications of a high PET in a region suffering from drought. How would this affect water resource management?

   Hint

   Think about balancing water supply and demand.