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Rainfall is usually "reported" as inches of rain. However, what is really being measured in a rain gauge is cubic inches of rain. | |||
Read page 263 of John William Moore (2007), <i>Meteorology Practical and Applied</i>, Nord Press, ISBN 1-4086-2788-4 which states: | |||
"When we speak of an inch of rain, we mean that sufficient has fallen to fill to overflowing a vessel which is 1 inch in length, 1 inch in breadth and 1 inch in width - that is, a volume of 1 cubic inch." | |||
Also read the <b>Procedures</b> section on page 1 of the pdf at http://www.earthsciweek.org/calendar/0809files/July2009.pdf which states: | |||
"Rain gauges measure the amount of rain in cubic inches" | |||
If I had the time to spare, I could refer you to many similar references | |||
Keep in mind that rain gauges with cross-sections smaller or larger than 1 square inch are marked 1 at height equal to 1 cubic inch, 2 at a height equal to 2 cubic inchs, 3 at a hieght equal to 3 inches, etc. |
Revision as of 23:41, 9 October 2008
Rainfall is usually "reported" as inches of rain. However, what is really being measured in a rain gauge is cubic inches of rain.
Read page 263 of John William Moore (2007), Meteorology Practical and Applied, Nord Press, ISBN 1-4086-2788-4 which states:
"When we speak of an inch of rain, we mean that sufficient has fallen to fill to overflowing a vessel which is 1 inch in length, 1 inch in breadth and 1 inch in width - that is, a volume of 1 cubic inch."
Also read the Procedures section on page 1 of the pdf at http://www.earthsciweek.org/calendar/0809files/July2009.pdf which states:
"Rain gauges measure the amount of rain in cubic inches"
If I had the time to spare, I could refer you to many similar references
Keep in mind that rain gauges with cross-sections smaller or larger than 1 square inch are marked 1 at height equal to 1 cubic inch, 2 at a height equal to 2 cubic inchs, 3 at a hieght equal to 3 inches, etc.