Line 13: |
Line 13: |
| ===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== |