15 



Figure 3.9: Five- Year Moving Flow-Weighted Boron Concentration for East Poplar 

 River at the International Boundary 



2 - 



! « 



e 



a 1 



Figure 3.10: Daily Boron Concentration, 1982 to 1995, East Poplar River 

 at the International Boundary 



S 2 - 



o ■ 



eo 



Dec-81 Deo83 Dec-85 Dec-87 Dec-89 Dec-91 Dec-93 Dec-95 



Slope = 0.0251 mg/lJyear 

 R-Squared = 0.11 



Linear regression line 



