43.1. Infiltration

Try these first

1. 1.

   What is infiltration?

   Hint

   Think about how plants get water.

2. 2.

   Name one factor that affects infiltration.

   Hint

   Consider the type of soil.

3. 3.

   What is infiltration?

   • A. The process of water entering soil
   • B. The process of water leaving soil
   • C. The process of water running off the surface

   Hint

   Think about how water soaks into the ground.

4. 4.

   True or False: Infiltration capacity increases as the soil becomes saturated.

   • True
   • False

   Hint

   What happens to a sponge when it’s full of water?

5. 5.

   In an experiment, the infiltration capacity of a sand soil was measured at 30 mm/hr and clay soil at 5 mm/hr. If a storm produced 50 mm of rain, how much will be runoff if the storm lasted for 1 hour?

   Hint

   Calculate total rainfall minus total infiltration.

6. 6.

   A farmer uses a Double Ring Infiltrometer and measures infiltration rates of 25 mm/hr initially and 10 mm/hr after one hour. Explain the significance of these measurements for irrigation planning.

   Hint

   Think about water absorption rate changes over time.