APPENDIX A 

 WATER CONSTANTS 



Chemical formula for water =H 2 O. 



Specific gravity of water = 1. 



Maximum density of water occurs at 4 C. or 39.2 F. 



1 cubic foot of water at 4 C. =62.2786 pounds. 

 1 cubic foot of water at 49 F. =62.2515 pounds. 

 1 gallon (U. S.) of water = 8.3254 pounds. 

 1 cubic foot of water = 7.48 gallons. 

 1 litre of water =2. 1997 pounds. 

 1 ton = 32.1 cubic feet of water. 



1 acre-foot = the volume of water which will cover an acre 1 foot deep. 

 1 acre-inch = the volume of water will cover an acre 1 inch deep. 

 1 acre-foot = 43, 560 cubic feet. 

 1 acre-foot = 2,712,856 pounds. 



1 California "miner's inch" =0.020 cubic feet per second. 

 1 Colorado "miner's inch" =0.026 cubic feet per second. 

 1 Arizona "miner's inch" =0.025 cubic feet per second. 



1 cusec = 1 second-foot = 1 cubic foot of water per second. 



1 second-foot flowing for twenty-four hours (=86,400 cubic feet) 

 will cover 1 acre 1.9835 feet deep = 1.9835 acre-feet (approxi- 

 mately 2 feet). 



1 second-foot flowing for 120 days will cover: 



240 acres 1 foot deep. 120 acres 2 feet deep. 



180 acres \Y^ feet deep. 80 acres 3 feet deep. 



(477) 



