Wednesday, October 31, 2012

Soil Dry Percolation Rate: soil

     To perform this lab, I placed a small piece of filter paper in the neck of a 16 oz water bottle that has been cut off to act as a funnel. I filled the funneled section with soil samples to 1 cm of the top. I set the funnel section into the remaining bottom part of the water bottle. I then poured water onto the surface of the soil and started the timer when the water hit the sample and stopped the timer when there was a measurable amount of water that had fallen through the soil and filter paper.

     9.7 seconds went by before there was a measurable amount of water in the bottle. The total amount of water that fell through in 9.7 seconds was 35.2 mL. To calculate the rate of the percolation I measured in cubic centimeters of water per surface area of sample for second. The equation is 35.2 mL / 9.7 seconds. The surface area of the bottle was 28.27 cm^2. I found the percolation rate to be 3.63 cm^3 per second / the surface area of 28.27 cm^2.the sand took 18 seconds for a measurable amount of water to reach the bottom. The total amount of water that fell through in this period of time was 22.5 ML. The surface area was 28.27 cm^2. The percolation rate was found to be 1.25 cm^3 per second/ the surface area of 28.27 cm^2.

The following photos are of the bottle and funnel after the water was poured through the soil and the water that ran through the soil.



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