320 



HYDRAULICS AND ITS APPLICATIONS 



From these values a curve may be constructed if required for use, and 

 intermediate values obtained by interpolation. 



In the case of a fall down-stream,-^ is always less than unity. The 

 following table gives values of (< m) for this case. 



As an example of the use of these tables, calculate the rise in level at 

 a point \ mile up stream, produced by a dam arranged so as to raise the 

 level at its crest through 8 feet. The original depth of the stream, 

 supposed uniform, was 2 feet, the slope of the bed 1 in 500 (='002), 

 and the value of / = '006. 



The necessary height of the darn may be calculated by an application 



