Please provide an in-depth explanation of the Field Infiltration Test SetUp and Steps Ring infiltrometer of 30 cm diameter and 60 cm diameter will be used
Please provide an in-depth explanation of the Field Infiltration Test SetUp and Steps
Ring infiltrometer of 30 cm diameter and 60 cm diameter will be used
STEPS
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Step 1: |
Hammer the 30 cm diameter ring at least 15 cm into the soil. Use the timber to protect the ring from damage during hammering. Keep the side of the ring vertical and drive the measuring rod into the soil so that approximately 12 cm is left above the ground. |
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Step 2: |
Hammer the 60 cm ring into the soil or construct an earth bund around the 30 cm ring to the same height as the ring and place the hessian inside the infiltrometer to protect the soil surface when pouring in the water (Figure 75). |
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Step 3: |
Start the test by pouring water into the ring until the depth is approximately 70-100 mm. At the same time, add water to the space between the two rings or the ring and the bund to the same depth. Do this quickly. |
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The water in the bund or within the two rings is to prevent a lateral spread of water from the infiltrometer. |
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Step 4: |
Record the clock time when the test begins and note the water level on the measuring rod. |
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Step 5: |
After 1-2 minutes, record the drop in water level in the inner ring on the measuring rod and add water to bring the level back to approximately the original level at the start of the test. Record the water level. Maintain the water level outside the ring similar to that inside. |
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Step 6: |
Continue the test until the drop in water level is the same over the same time interval. Take readings frequently (e.g. every 1-2 minutes) at the beginning of the test, but extend the interval between readings as the time goes on (e.g. every 20-30 minutes). |
Note that at least two infiltration tests should be carried out at a site to make sure that the correct results are obtained.
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