HYDROLOGY OF NEW YORK 



201 



Fig. 16 is a similar diagram for the Upper Hudson during 

 the replenishing period for the same rears. This diagram shows 

 that in 1890 and 1900 there was a discrepancy, which, as in the 

 previous cases, was presumably in the precipitation of that period. 



30 



20 Z 



.2 



10 5 10 



UPPER HUDSON RIVER 



Crowing period 



20 



z- v.; 



10 15 20 



Precipitation in inches 



10 15 20 



25 



25 



30 



30 



Fig. 15 Diagram showing the relation between the precipitation 

 and runoff in the Upper Hudson river catchment during the 

 growing period. 



30 



20 



10 5 10 



UPPER HUDSON RIVER 



Replenishing period 



20 



4-4- 



10 



20 



Precipitation in inches 

 10 15 20 



25 



25 



30 



30 



Fig. 10 Diagram showing t.he precipitation and runoff in the 

 Upper Hudson river catchment during the replenishing period. 



Proceeding on similar lines, the writer prepared, several years 

 ago, a series of curves, from which the monthly runoffs may be 



