11 



Figure 3.4: TDS Concentration for 1999 Grab Samples from East Poplar River 

 at the International Boundary 



1200 



"a 1000 o 996 #968 



800 

 600 

 400 

 200 



♦ 951 



♦ 808 



♦ 904 ^874 



"♦555^ 



♦ 1Q2Q 



it 1040 



♦ b'/O 



♦ 615 



♦ 691 



CO & 



♦ 7 88 



Figure 3.5: Three-Month Moving Flow-Weighted TDS Concentration for East 

 Poplar River at the International Boundary 



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