68 PROCEEDINGS OF THE 



an hourly record of the gauge-height, the discharge 

 was approximated. The floods are usually not to ex- 

 ceed twelve hours in duration. During a larger por- 

 tion of the year the channel is nearly dry. Queen 

 Creek rises in the mountains to the southeast of 

 Phoenix, and flows in a generally southwesterly direc- 

 tion, losing itself in the desert north of the Gila River 

 Reservation. The area of the drainage basin is 143 

 square miles, of which 61 per cent, is above an elevation 

 of 3,000 feet, and 39 per cent below that elevation. 

 The annual discharge is approximately 10,000 acre 

 feet. The basin is almost entirely bare, there being a 

 few pinion trees and very little brush or grass. The 

 following table of discharge for the year 1896 for 

 Queen Creek is taken from the Eighteenth Annual 

 Report of the Geological Survey, Part IV, Hydrog- 

 raphy. It represents a typical year's output : 



ESTIMATED MONTHLY DISCHARGE OF QUEEN CREEK AT WHIT- 

 LOW'S, ARIZONA. DRAINAGE AREA, 143 SQUARE MILES. 



Discharge in Second feet. 



Month, 1896. Max. Min. Mean. 



January 2 2.0 2.0 



February 2 2.0 2.0 



March 2 2.0 2.0 



April 2 i.o 1.5 



May I i.o i.o 



June i i.o i.o 



July 9,000 o.o 121.6 



August 1,433 0.6 13.1 



September 3.428 0.5 17.1 



October 1,188 0.5 13.3 



November 80 0.6 1.3 



December 207 0.6 2.0 



9,000 .0 15. 



