62 



SEWER DESIGN 



2.4 times the average, obtained by dividing the total effluent 

 due to the storm by the number of seconds of flowing. Hence 



it will be seen that the necessary capacity will be 0.5 X -= 

 of the rainfall per second. 



TABLE VII 



TABLE SHOWING THE RAINFALL AND STREAM-FLOW ON THE 

 SUDBURY RIVER 



In a table for European cities the percentage of the rain- 

 fall provided for varies from | of a rainfall of 0.9 inch for 



