Lysimeters |
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Eventually, all the tubing is connected and the pit is filled back in. When it rains, water filters through the soil (uphill of the pit), enters the cup, and travels through a tube (dotted line) to a buried (barely visible) "reservoir," which collects the sample. Approximately once a month technicians visit these sites and, using a hand pump, empty the reservoirs using the "sampling tube." The end of the sampling tube is the only part of the lysimeter that is above ground. |
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