2.5. Permeability and Drainage

Try these first

1. 1.

   What does Darcy's Law express?

   Hint

   Think about the flow rate of water in relation to soil.

2. 2.

   Name one factor that affects soil permeability.

   Hint

   Consider the size of the soil particles.

3. 3.

   What does Darcy's Law help predict?

   • Speed of sound
   • Water flow through soil
   • Soil composition

   Hint

   Think about soil and its interactions with water.

4. 4.

   True or False: High permeability soils trap water.

   • True
   • False

   Hint

   Consider the characteristics of drainage versus retention.

5. 5.

   Design a pavement system for a construction site with clayey subsoil. Discuss how permeability issues could arise and propose design solutions.

   Hint

   Consider how drainage systems are implemented to mitigate weak soil conditions.

6. 6.

   Calculate the discharge rate if you have a permeability of 0.1 m/s, a hydraulic gradient of 2, and a cross-sectional area of 5 m².

   Hint

   Remember to substitute the values into Darcy's equation directly.