492 



NEW YORK STATE MUSEUM 



gradually decreased during the month of August until, on August 

 26, it was only 216,000 gallons per day, or 20 cubic feet per minute, 

 which was the lowest point reached during the summer of 1883. 



This stream can not be considered a good water yielder. A 

 mean discharge of 216,000 gallons in twenty-four hours from a 

 catchment area of 4.3 square miles represents a yield of 0.334 cubic 

 foot per second, or, what is the same thing, 0.078 cubic foot per 

 second per square mile. It is apparent, therefore, that eyen a 

 spring-fed stream with a deep yalley in Chautauqua county may 

 at times furnish a very small outflow, though it should not be 

 oyerlooked that the flow of 0.078 cubic foot per second per square 

 mile was the extreme minimum for one day only. The relations 



Fig. 38 Cross-section of dam near Fredonia on west branch of Canada way 

 creek. 



of this extreme minimum to the daily flows during the period coy- 

 ered by the measurements may be easily gathered from an inspec- 

 tion of table No. SI. The gradual falling in water yield from 

 August 1 to 26 is the most interesting fact reyealed by these 

 measurements. 



The following was the rainfall at the point of measurement 

 during the month of August. 1S83 : 



Inches 



August 3 0.04 



August 13 0.10 



August 20 0.05 



August 23 0.05 



August 28 1.96 



