30.4. Infiltration Capacity Curves

Try these first

1. 1.

   What does infiltration capacity refer to?

   Hint

   Think about what happens when it rains on different types of soil.

2. 2.

   What is Horton’s Equation used for?

   Hint

   Focus on the time-related changes in infiltration.

3. 3.

   What does infiltration capacity indicate?

   • Minimum water absorption rate
   • Maximum water absorption rate
   • Average water absorption rate

   Hint

   Think about high performance versus low performance.

4. 4.

   Horton’s Equation describes how infiltration capacity changes over time.

   • True
   • False

   Hint

   Consider what happens during prolonged rain.

5. 5.

   A soil has an initial infiltration capacity of 80 mm/h and a final capacity of 20 mm/h with a decay constant of 0.05. Calculate the infiltration capacity after 15 hours.

   Hint

   Make sure to calculate the exponent part first!

6. 6.

   In an agricultural field, using Philip’s Equation, if sorptivity S is 10 and A is 5, calculate f(t) when t = 4.

   Hint

   Focus on calculating the time component's exponent correctly.