STREAM-FLOW 



57 



TABLE XXIII 



HUDSON RIVER, 1888-1901 



Catchment Area, 4500 Square Miles 



Mean Values 



in 



nches Precipitation 



FIG. 17. Curves Showing Mean Rainfall and Run-off on Upper 

 Hudson River. 



several fold. This occurs usually in high-head plants where the 

 quantity of water is relatively small and the rough character of 

 the country permits the construction of deep reservoirs, but there 

 are some low head plants with short periods of low water where 

 the storage of some important tributary stream will, at reasonable 

 expense, greatly increase the minimum average daily output. 



