o 

 o 



o 



X 



I/) 

 o 



CP 



o 



x: 

 o 

 tn 



35-1 



30 



25- 



20- 



15- 



10 



Jan Feb Mar 



Apr 



T : 1 1 1 r 



May Jun July Aug Sept 



r-in 



O 



o 



E 

 o 



<0 



en 



\_ 

 a 



JZ 



o 

 w 



Q 



Oct Nov Dec 



FIGURE 11. Monthly averages of mean daily dischai^ge downstream 

 from the Libby Dani site prior to impoundment (1970) 

 and following impoundment (1977) (SOURCE: Graham 1979a) 



83 



