leOOr 



SHORT-TERM OBJECTIVE (1500 mg/L) 



1400 - 

 1200 

 3 1000 

 J 800 



O 



t- 800 



400 



200 







(o) 



■¥ sampl* data 

 • calculatad data 





+f+% V 



1975 76 



77 



78 



79 80 



TIME 



81 



82 



83 



1984 



1975 76 77 78 79 80 81 82 83 19 84 



TIME 



Figure 2 (a) Three-month Short-term Flow-weighted Concentration for 

 TDS, East Poplar River at the International Boundary; (b) 

 Five-year Long-term Flow-weighted Concentration for TDS, 

 East Poplar River at the International Boundary 



13 - 



