Page:Handbook of Meteorology.djvu/291

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Table 19—Quantity of Rainfall in Cu Ft and U S Gallons per Acre
Inches of rainfall	Cu ft per acre	Gallons per acre	Inches of rainfall	Cu ft per acre	Gallons per acre
0.01	36.3	271.5	0.10	363	2715.4
0.02	72.6	543.5	0.20	726	5430.5
0.03	108.9	814.5	0.30	1089	8146.5
0.04	145.2	1086.5	0.40	1452	10861.5
0.05	181.5	1357.5	0.50	1815	13577.5
0.06	217.8	1629.5	0.60	2178	16292.5
0.07	254.1	1900.5	0.70	2541	19007.5
0.08	290.4	2172.5	0.80	2904	21723.5
0.09	326.7	2443.5	0.90	3267	24438.5
0.10	363.0	2715.5	1.00	3630	27154.5

The U S or Queen Anne gallon used in the foregoing table contains 231 cu in or 0.1368 cu ft. The Imperial or British gallon contains 277.3 cu in. To reduce U S to Imperial gallons multiply by 0.83⅓.

To find the quantity of rainfall per square mile, multiply the quantity per acre by 640.

One inch of rain per acre is at the rate of 113 tons per acre or 7320 tons per sq mi.

Table 20—Depth of Water in a Standard 8-inch Gauge
Corresponding to the Weight of Snow or Rain.
Weight Pounds	.00	.01	.02	.03	.04	.05	.06	.07	.08	.09
	in	in	in	in	in	in	in	in	in	in
0.0	.00	.01	.01	.02	.02	.03	.03	.04	.04	.05
0.1	.06	.06	.07	.07	.08	.08	.09	.09	.10	.10
0.2	.11	.12	.12	.13	.13	.14	.14	.15	.15	.16
0.3	.17	.17	.18	.18	.19	.19	.20	.20	.21	.21
0.4	.22	.23	.23	.24	.24	.25	.25	.26	.26	.27
0.5	.28	.28	.29	.29	.30	.30	.31	.31	.32	.32
0.6	.33	.34	.34	.35	.35	.36	.36	.37	.37	.38
0.7	.39	.39	.40	.40	.41	.41	.42	.42	.43	.44
0.8	.44	.45	.45	.46	.46	.47	.47	.48	.48	.49
0.9	.50	.50	.51	.51	.52	.52	.53	.53	.54	.55

One pound equals 0.5507 in.