HYDROLOGY OF NEW YORK 



509 



stream is included in this measurement. The flow for the month 

 of August, 1899, was at the mean rate of 524 cubic feet per second. 

 In September, 1900, the mean flow for the entire month was 609 

 cubic feet per second. 



The mean flow at Little Falls for the month of August, 1899, 

 was 223 cubic feet per second, but this does not include diversion 

 to the Erie canal, which may amount to about 150 cubic feet per 

 second, or to a total flow of about 375 cubic feet per second 

 (catchment, 1306 square miles), which is at the rate of about 0.28 

 cubic foot per second per square mile. In comparison with the 

 flow for the month of August, 1899, at Rexford Flats, these figures 

 show that the upper Mohawk river is relatively a better water 

 yielder than the lower — the low flows from Schoharie creek and 

 contiguous catchment areas, proband making the difference. The 

 lowest water observed since gagings have been kept at Little Falls 

 was in August, 1899, when the mean flow for nine days was but 

 120 cubic feet per second, or 0.07 cubic foot per second per square 

 mile. This, however, does not represent the total flow of the 

 stream, as nearly the entire river was being taken for the supply 

 of Erie canal. 



In September, 1901, the minimum flow of Mohawk river at 

 Utica for two days was 70 cubic feet per second (catchment, 500 

 square miles), or at the rate of 0.14 cubic foot per second per 

 square mile. These figures are somewhat indefinite. 



The minimum flow of Mohawk river at Ridge Mills for Septem- 

 ber, 1899, was at the mean rate of 81 cubic feet per second for 

 twenty-two days; for three days, the mean flow was 56 cubic feet 

 per second, and for two days, 53 cubic feet per second (catchment, 

 153 square miles), or at the rate of 0.31 cubic foot per second 

 per square mile. 



Minim tin) flow of Cayadutta creek. In August, 1899, the mean 

 flow of this stream at Johnstown for the entire month was 18 

 cubic feet per second; in September, 20 cubic feet per second, and 

 in October, 21 cubic feet per second. For several days during 

 these months it was from 14 to 16 cubic feet per second. In July, 

 1900, the mean flow was 17 cubic feet per second, and for several 

 days it was from 12 to 14 cubic feet per second, which, for a catch- 

 ment area of 40 square miles, is at the rate of about 0.3 to 0.35 

 cubic foot per second per square mile. 



