398 ASSIN5IB0INE AND SASKATCHEWAN EXPEDITION. 



An approximate estimate of the number of cubic feet 

 of water passing down the South Branch, North Branch, 

 and main Saskatchewan, gives the following numbers : — 



Cubic feet per hour. 



South Branch ..... 123,425,616 



North Branch . . . . . 91,011,360 



Main Saskatchewan, at Fort a la Corne . . 214,441,290 



Main Saskatchewan near Tearing Biver . . 206,975,000 



The following table will show the comparative mag- 

 nitude of the Saskatchewan *: — 





Area of 



s 



Discharge in cubic feet per second. 



NAMES. 



drainage in 

 square 



5 8 









&D=3 



S2 











miles. 





Low water 



Mean. 



High water. 



Amazon .... 



2,400,000 



4,000 







1,700,000 



Mississippi . . . 



1,226,000 



4,400 



447,200 





1,270,000 



St. Lawrence . . 



565,000 



2,600 





' 900,000 

 389,000 

 207,000 



Niagara .... 



237,300 



370,589 



406,000 





432,000 



1^680 



36,300 



494,200 



Main Saskatchewan 



240,000 







59,289 













34,284 





Nile 



520,200 



2,240 



23,100 



220,000 





Ohio, at Wheeling . 



25,000 



1,400 



260,277 



Thames .... 



5,000 



'215 



1,330 





7,900 





38,000 



560 



7,000 



21,000 



204,000 





88,000 



700 



13,400 



33,700 



164,000 



Ottawa (Grenville) 



80,000 



700 



35,000 



85,000 



150,000 



French Biver 



4,700 





9,500 





Subjoined is the period of opening and closing of the 

 Saskatchewan for several years at Fort a la Corne. 



River Closed. 



1851 . . November 6th. 



1852 . . „ 11th. 



1853 . . „ 13th. 



River 



1852 

 1853 

 1854 

 1856 

 1857 

 1858 



Opened. 



April 12th. 

 „ 14th. 

 „ 14th. 

 „ 9th. 

 „ 16th. 

 „ 20th. 



* This table, with the exception of the Main Saskatchewan and the 

 South Branch, is from the Beport of the Ottawa Survey, by T. C. Clarke, 

 Esq., O.E. 



