2.2. Advection and Diffusion Model

Try these first

1. 1.

   Define advection.

   Hint

   Think about flow systems like rivers.

2. 2.

   Give an example of diffusion.

   Hint

   Consider how color disperses in water.

3. 3.

   What is advection?

   • Movement of particles with airflow
   • Movement of particles from high to low concentration
   • The mixing of soil by organisms

   Hint

   Think about the flow of rivers.

4. 4.

   True or False: Bioturbation only occurs in water.

   • True
   • False

   Hint

   Consider where organisms might mix sediments.

5. 5.

   Design an experiment to measure the effects of bioturbation on sediment diffusion rates.

   Hint

   Consider how to isolate the effects of bioturbation.

6. 6.

   Discuss potential issues in relying solely on flux measurements for remediation decisions.

   Hint

   What kinds of errors can arise from environmental variability?