HYDROLOGY OF NEW YORK 



629 



be made for carrying over moderate quantities of water from the 

 latter end of the year more effectually than in any other way. 

 An exception has been made to this general proposition in the 

 case of Schroon valley reservoir, discussed in detail on another 

 page. 



Table No. 8G — Mean precipitation ox the upper Hudson catchment aeea 



(In inches) 



MONTH 



Albany 



Glens Falls 



Keene Valley 



Mean of Albany, 

 Glens Falls and 

 Keene Valley 



Western Massa- 

 chusetts 



Northern plateau 



Lowville acad- 

 emy 



Johnstown acad- 

 emy 



Cambridge acad- 

 emy 



Fairfield acad- 

 emy 



Granville acad- 

 emy 



Mean of all 



(1) 



December 



January 



February 



May 



Storage period . 



June 



July 



Growing- period 



September 



October 



Replenishing 



period 



Yearly total. . 



(2) 



(3) 



(4) 



(5) 



(6) 



(7) 



<8) 



(9) 



(10) 



(11) 

 2.78 



2.06 

 2.36 

 2.53 

 3.04 



03) 



(13) 



2.71 

 2.75 

 2.49 

 2.72 

 2.80 

 3.62 



3.19 

 3.16 

 3.03 

 2.72 

 2.15 

 3.10 



2.75 

 3.00 

 2.22 

 2.24 

 2.09 

 3.05 



15.35 



3.01 

 3.03 

 2.64 

 2.50 

 2.14 

 3.14 



4.31 

 3.36 

 2.83 

 2.94 

 2.02 

 3.17 



3.57 

 3.88 

 3.60 

 2.52 

 2.39 

 4.46 



2.14 

 2.35 

 2.43 

 1.78 

 1.91 

 2.79 



2.91 



3.30 

 2.86 

 3.63 

 2.93 

 3.45 



2.36 

 3.36 

 2.61 

 2.12 

 3.36 

 3.65 



2.48 

 2.08 

 1.42 

 1.74 

 2.13 

 3.47 



2.92 

 2.99 

 2.56 

 2.48 

 2.43 

 3.38 



17.09 



17.35 



16.47 



18.63 



20.42 



13.40 



19.08 



17.46 



15.46 



13.32 



16.76 



4.07 

 4.29 



2.83 

 3.25 

 4.17 



2.89 

 3.61 

 4.21 



2.99 

 3.53 

 4.20 



3.24 

 3.44 

 3.91 



3.88 

 3.83 

 5.07 



3.42 

 3.67 

 2.85 



4.20 

 4.01 

 3.14 



4.66 

 3.91 

 3.98 



4.29 

 4.21 

 3.66 



3.21 

 3.63 

 2.97 



3.67 

 3.78 

 3.79 



12.32 



10.25 



10.71 



10.75 



10.59 



12.78 



9.94 



11.35 



12.55 



12.16 



9.81 



11.25 



3.43 

 3.58 

 3.08 



2.96 

 2.36 

 3.24 



3.00 

 2.49 

 3.56 



3.13 

 2.60 

 3.26 



3.51 

 3.41 

 2.84 



3.57 

 3.06 

 3.46 



2.84 

 3.29 

 2.94 



2.87 

 3.20 

 3.33 



3.27 

 3.60 

 3.29 



3.08 

 3.56 

 2.46 



2.67 

 2.90 

 2.88 



3.12 

 3.15 

 3.11 



10.09 



8.56 



9.05 



8.99 



9.76 



10.09 



9.07 



9.49 



10.16 



9.11 



8.45 



9.38 



39.50 



36.16 35.11 



36.22 



38.98 



43.29 



32.41 



39.92 



40.17 



36.73 



31.58 



37.39 



The figures in the above table are obtained by averaging the results obtained at 

 Albany from 1825 to 1895; at Glens Falls, from 1879 to 1895: at Keene Valley, from 1879 

 to 1895 : in western Massachusetts, from 1887 to 1895 : in northern plateau, from 1889 to 

 1895; at Lowville academy, from 1827 to 1848: at Johnstown academy, from 1828 to 

 1845 ; at Cambridge academy, from 1827 to 1839 ; at Fairfield academy, from 1828 to 

 1849 ; at Granville academy, from 1835 to 1849 : the mean of Albany, Glens Falls and 

 Keene Valley, from 1879 to 1895. Although the- foregoing figures are here given in 

 detail, later studies indicate that the mean rainfall of the northern plateau as defined 

 by the State Meteorological Bureau is the best rainfall record to apply to the upper 

 Hudson area. 



The proposed regulation of the Hudson river has been provi- 

 sionally arranged on the basis of maintaining a flow of at least 

 4500 cubic feet per second at Meehanicville, where, as has been 

 seen, the catchment area is 4500 square miles, such a regulation 

 being equivalent to producing at Meehanicville a constant flow of 1 

 cubic foot per second per square mile. 



As regards the change in the regimen of the stream due to 

 storage, it may be remarked that the reservoirs have been 



