1. Laboratory Measurement of Permeability

Try these first

1. 1.

   What is the purpose of the constant head method?

   Hint

   Think about the type of soils this method is designed for.

2. 2.

   Name one measurement taken during a falling head test.

   Hint

   Consider what happens to the water in the standpipe.

3. 3.

   What is the constant head method primarily used for?

   • coarse-grained soils
   • fine-grained soils
   • both types of soils

   Hint

   Think about which type of soil allows for a more consistent flow.

4. 4.

   True or False: The falling head method can be suitable for all types of soil.

   • True
   • False

   Hint

   Remember the specific soil types each method is recommended for.

5. 5.

   A constant head permeameter measures water flow at 3 liters/min through a 1 meter soil sample with a head of 2 meters. Calculate the permeability.

   Hint

   Keep the units consistent for accurate calculations.

6. 6.

   In a falling head test, the head drops from 0.8 m to 0.3 m over 15 minutes. If the test setup gives an effective area of standpipe of 0.005 m^2, determine the permeability.

   Hint

   Focus on the logarithmic relationship between the heads for accurate results.