EAINFALL AND FLOODS. 31 



/Rainfall, October 16th to 19th, 1891 = 2-8 inches in 

 65 hours. 

 Volume over Frome basin = 442 million cubic feet. 



o 



^ / Average rate of fall = -— — =6*8 million cubic feet per 



Do 



hour. 



Maximum rate of discharge =- ; ^^ = 4"3 



* 65x1-58 ( = 103) 



^ million cubic feet per hour. 



I Rainfall, March 6th to 8th, 1889 = 3*2 inches in 48 

 hours. 

 Volume over Frome basin = 506 million cubic feet. 



Averaofe rate of fall = —-^ =10-54 million cubic feet 



48 





per hour, 

 imum ra 

 million cubic feet per hour. 



Maximum rate of discharge = — — — -— = 6-7 



Rainfall, October 22nd to 24th, 1882 = 3-7 inches in 

 60 hours. 



Volume over Frome basin = 585 million cubic feet. 



585 

 Average rate of fall = -—^ = 9-75 million cubic feet per 



hour. 



585 

 Maximum rate of discharge = —- — — — — =6-2 



million cubic feet per hour. 



These results, w^hich profess to be nothing more than 

 rough approximations to the truth, agree well enough with 

 the impression already mentioned as derived from a more 

 general view, and tend, I think, to throw considerable 

 doubt on the estimates which some engineers have formed 

 of the rate of discharge for which provision should be made. 



