35.3.1. Grain Size and Distribution

Try these first

1. 1.

   What is specific yield?

   Hint

   Think about the definition provided in class.

2. 2.

   Which grain material would likely have a higher specific yield, gravel or clay?

   Hint

   Consider which material allows more drainage.

3. 3.

   Which type of soil generally has a higher specific yield?

   • Gravel
   • Clay
   • Silt

   Hint

   Recall the differences discussed between various soil types.

4. 4.

   True or False: Finer materials usually yield more water due to their higher porosity.

   • True
   • False

   Hint

   Consider the balance between porosity and specific yield.

5. 5.

   Calculate the specific yield of a sandy aquifer with a total volume of 1000 m³, yielding 200 m³ of water through gravity drainage.

   Hint

   Use the specific yield formula we discussed.

6. 6.

   Discuss how varying grain sizes across a single aquifer can complicate water extraction efforts.

   Hint

   Think about the impacts of uneven distribution on sustainability.