HYDROLOGY OF NEW YORK 



613 



The small hamlet of Redfield is the only village within the area 

 to be flooded. The lands to be taken include a considerable pro- 

 portion of swamp and timber area, from which the valuable 

 timber has been mostly cut. The balance of the area is not 

 valuable, and this reservoir, as a whole, is considered to present 

 favorable conditions for taking such an area. There is one ceme- 

 tery to be removed at Kedfield. 



In the Report of the State Engineer and Surveyor for 1895 it 

 is shown in the report of the upper Hudson storage surveys that 

 reservoirs for storing water in the Adirondack region may be 

 developed up to a storage of 13.5 inches on the tributary catch- 

 ment area for a runoff like that of Hudson river. Since meteoro- 

 logical conditions on the Salmon river are substantially the same 

 as on the Hudson, there is no reason why the argument made in 

 the Hudson storage report may not apply here. Taking, then, the 

 Hudson report as a part of this discussion, so far as necessary 

 to cover the argument for reservoirs developing a storage of 13.5 

 inches on a catchment area subject to a runoff like that of the 

 northern plateau of New York, we may state the general problem 

 in this way : Having a reservoir of a given area and volume, 

 with a tributary catchment area of 190.5 square miles, it is re- 

 quired to find how much water can be reasonably expected to be 

 collected from the catchment, stored in the reservoir, and drawn 

 from it during a dry year, or during a series of such years. 



The water collected and stored in the Salmon river reservoir 

 during the entire year may be drawn from it in three ways, as 

 follows : 



1) By evaporation from the surface of the reservoir. 



2) By supplying a certain fixed quantity to Salmon river below 

 the dam during the entire year. 



3) By feeding the canal during the months of May. June, July, 

 August, September, October and November. 



There will also be a slight outgo by percolation, leakage, etc. 

 which may be neglected here. 



The catchment areas of the Salmon river and the upper Hudson 

 being of the same general character as regards proportion of for- 

 ests and annual rainfall, it is reasonable to estimate that the run- 

 offs from the two streams will be substantially equal; hence, the 



