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Rainfall Measurement
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Rainfall is defined as the depth of water that crosses a horizontal period over a given length of time and is an integral part of the hydrologic cycle. Students can determine the rainfall of a given area through the use of a rain gauge.
Rainfall Measurment
Students must first place the rain gauge in a place where rain falls unobstructed by buildings or trees. The rain gauge must then be read daily within one hour of local solar noon. Students must be sure that their eyes are level with the water in the measuring tube and that they read the bottom of the meniscus. After taking the measurement, students must empty the water from the measuring tube into a clean beaker or jar for the pH measurement and then reassemble and remount the rain gauge. Even if it does not rain, students should check the rain gauge daily to make sure that it is free of debris (leaves, twigs, papers, etc.).
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Rain gauge
Atmosphere Investigation Data Work Sheet
Pens or pencils
Carpenter’s level
Wood post (typically about 10 cm x 10 cm)
Screwdriver
Posthole digger
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None.
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1) Students pour the contents of the rain gauge into a beaker.
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2) Students take a pH measurement of the collected rain.
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Click here to view QuickTime movie of protocol!
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