Changes

===Installation===

===Installation===

# Choose or create clear, level ground at the desired test location.  

# Choose or create clear, level ground at the desired test location.  

2. Work with minimal disturbance to the soil within the test area.   

# Work with minimal disturbance to the soil within the test area.   

3. Place the wooden block across the ring and use the sledge hammer to drive the ring into the ground by ≥ 5 cm.  

# Place the wooden block across the ring and use the sledge hammer to drive the ring into the ground by ≥ 5 cm.  

4. Check that the ring is level in all directions and correct as necessary.  

# Check that the ring is level in all directions and correct as necessary.  

5. Repeat with the second ring (note that the order may vary if the rings are of differing heights.

# Repeat with the second ring (note that the order may vary if the rings are of differing heights.

6. Both rings should be firm into the ground.  

# Both rings should be firm into the ground.  

7. Secure the metal rulers to the inside of the rings.  

# Secure the metal rulers to the inside of the rings.  

Measurements  

===Measurements===

1. To begin measurements gently pour 5 – 10 cm of water into both the inner and outer rings.  

# To begin measurements gently pour 5 – 10 cm of water into both the inner and outer rings.  

2. Measurement of the water depth should be made every 15 minutes for the first hour, 30 minutes in the second hour and then hourly up to 6 hours.  

# Measurement of the water depth should be made every 15 minutes for the first hour, 30 minutes in the second hour and then hourly up to 6 hours.  

3. The rings should be covered to reduce evaporation, particularly in hot weather and when the soil is clayey and infiltration is slow.

# The rings should be covered to reduce evaporation, particularly in hot weather and when the soil is clayey and infiltration is slow.

 

 

 

 

==Calculations==

==Calculations==