STREAM-FLOW 



55 



in some regions than in others. In Fig. 16 are shown some typical 

 hydrograph records of New York streams, which clearly illustrate 

 what may be expected in the way of variations in stream flows. 



HUDSON RIVER 



MECHANICSVILLE 



TYPICAL NEW YORK STREAM 



OSWEGO RIVER 

 BATTLE ISLAND 

 UNUSUALLY STEADY STREAM 



80 



5 

 i 



I 15 



A 



E5 10 



GENESEE RIVER 



MOUNT MORRIS 



UNUSUALLY FLASHY STREAM 



jAprTI May Uunel July I Aug. ISept.1 Oct. I Nov.l Dec. Jan. I Feb.l Mar. I Apr. I May 



Fiu. 16. Hydrographs Showing Natural Fluctuations of Flow of New York 

 York State Streams. 



While of entirely different characteristics it can be seen that 

 there are certain common features in that the flows are heaviest 

 during the spring and early summer and lowest in autumn. 



This irregularity of flow is a very important factor in any water- 

 power development and one that compels the reckoning with the 



