5.1. Three Gradients Contribution

Try these first

1. 1.

   What is flux in the context of environmental science?

   Hint

   Think of it as the amount of a chemical moving across a boundary over time.

2. 2.

   Define the partition constant.

   Hint

   It's a balance reference between two states.

3. 3.

   What does 'flux' refer to in environmental science?

   • A measure of temperature variation
   • The flow of a substance across a surface
   • The amount of moisture in the air

   Hint

   Consider the movement of air or fluids.

4. 4.

   True or False: The partition constant does not change with moisture content.

   • True
   • False

   Hint

   Reflect on how moisture levels can alter chemical distribution.

5. 5.

   In a lab experiment measuring dibenzofuran flux, the soil's moisture is 20%, and the partition constant is adjusted. If the moisture drops to 10%, calculate the expected change in flux assuming a linear relationship.

   Hint

   Consider how the partition constant effects scaling with moisture.

6. 6.

   A researcher measures airflow velocity at two heights above the ground. If at height 1 (z1), the velocity is 2 m/s and at height 2 (z2), it is 4 m/s, calculate the friction velocity (v*) assuming no other forces are acting.

   Hint

   Remember to refer to tje equation concerning surfaces for better accuracy.