35.7. Specific Yield vs Storativity

Try these first

1. 1.

   Define specific yield.

   Hint

   Think about what influences the drainage of water.

2. 2.

   What does storativity refer to?

   Hint

   Consider how pressure affects water storage.

3. 3.

   What is specific yield generally associated with?

   • Confined aquifers
   • Unconfined aquifers
   • Neither

   Hint

   Remember the context of groundwater types.

4. 4.

   True or False: Storativity is usually greater than specific yield in confined aquifers.

   • True
   • False

   Hint

   Consider the impact of pressure on water storage.

5. 5.

   Analyzing a confined aquifer, you find the storativity to be 0.005. If the pressure decreases by 20% due to pumping, how much water can be expected to be released?

   Hint

   You need to relate storativity with the change in pressure and define the area.

6. 6.

   You're managing a well in an unconfined aquifer. The specific yield is 0.20. What will be the water volume released if the area of influence is 1000 square meters and the water table declines by 2 meters?

   Hint

   Remember how to apply the specific yield formula!