20.3.2. Indirect Methods

Try these first

1. 1.

   What is the formula for the Water Balance Method?

   Hint

   Recall the components of the water cycle.

2. 2.

   Which method utilizes the conservation of energy?

   Hint

   Think about how energy is conserved in different forms.

3. 3.

   What does ET stand for in hydrology?

   • Evapotranspiration
   • Evaporation Transformation
   • Environmental Technicians

   Hint

   Think about the water cycle.

4. 4.

   The Water Balance Method considers which of the following variables?

   Hint

   Remember the equation you learned.

5. 5.

   Using the Water Balance Method, calculate ET for a region that received 100 mm of precipitation, had 20 mm of runoff, experienced 10 mm of deep percolation, and had a soil water increase of 5 mm.

   Hint

   Apply the continuity equation correctly.

6. 6.

   Discuss how variations in wind speed affect the efficiency of the Aerodynamic Method in estimating ET.

   Hint

   Consider how mass transfer works in different wind conditions.