27.5.1. Horton's Equation

Try these first

1. 1.

   What does the term 'infiltration capacity' refer to?

   Hint

   Think about the limits of soil absorption.

2. 2.

   What does 'k' represent in Horton's Equation?

   Hint

   It starts with a 'd' and relates to timing.

3. 3.

   What does Horton's Equation model?

   • The infiltration rate over time
   • The rate of evaporation
   • Water runoff calculations

   Hint

   Think about how water enters the soil.

4. 4.

   Is the final steady infiltration rate (f_c) greater than the initial infiltration rate (f_0)?

   • True
   • False

   Hint

   Which one is measured first?

5. 5.

   Consider a soil with an initial infiltration rate of 100 mm/hr, a steady-state rate of 20 mm/hr, and k=0.1. Calculate the infiltration rate after 5 hours using Horton's Equation.

   Hint

   Start with finding the exponential part to simplify your calculations.

6. 6.

   Discuss how changes in rainfall intensity could impact the parameters of Horton's Equation during a storm event.

   Hint

   Consider the concept of saturation and how quickly soil can absorb moisture.