16.4.4.a. Mayer’s Formula

Try these first

1. 1.

   What does e_w represent in Mayer's Formula?

   Hint

   Consider the maximum amount of moisture the air can hold.

2. 2.

   In which units is evaporation (E) expressed in Mayer's Formula?

   Hint

   Think about how we measure water loss over time.

3. 3.

   What is the formula used to estimate evaporation?

   Hint

   Recall how we described the formula in class.

4. 4.

   If e_w is 4 kPa and e_a is 2 kPa, what will the value of (e_w - e_a) be?

   • 2 kPa
   • 5 kPa
   • 6 kPa

   Hint

   Just subtract the actual vapor pressure from the saturated vapor pressure.

5. 5.

   A lake reports e_w of 4.5 kPa, e_a of 2.0 kPa, and K of 1.5. If the wind speed is 5 m/s, calculate E.

   Hint

   Perform calculations in steps, ensuring each component is understood.

6. 6.

   Discuss how reducing wind speed could affect a farmer's water loss estimates using Mayer’s Formula? What methods might they apply to mitigate this?

   Hint

   Consider environmental factors and their influence on water conservation strategies.