Monday, November 4, 2013

Soil Dry Percolation Rate Test

Soil





















In our homemade funnel we made by cutting the the top off of a water bottle and adding filter paper, we filled it with a soil sample 1 cm from the top. We added 50 mL of water to the soil and after 60 seconds, 31 mL of water percolated over 10.21 cubic centimeters. Compared to the later results we found in the sand and clay, the water drained the fastest through the soil by far.

Sand



In the same funnel, we filled it with sand 1 cm from the top. We poured in 50 mL of water and at first it seemed to pool at the top, and did not soak through. After 120 seconds, a measurable amount of 26 mL percolated through the sand over the same surface area of 10.21 cm cubed. The sand took the second longest amount of time to have percolated a measurable amount of water, after soil.

Clay

Lastly, the clay took the longest to percolate through the same 10.21 cm cubed funnel. After 300 seconds only 17 mL of the 50 mL we put in percolated through the dry clay, giving it the slowest rate of all three substances. The fine powdery particles of the clay seemed to trap the water, having it pool on top for a few minutes. 

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