3.2.5.2 Boron 



Boron water-quality sample data for 2003 at the East Poplar River at International Boundary was 

 incomplete and no flow-weighted concentration analysis was conducted. In 2004, only four boron 

 water-quality samples will be available for analysis. 



Boron concentrations are not as well-correlated with specific conductance as TDS. Boron is a relatively 

 minor ion, and does not in itself contribute to a large degree to the total load of dissolved constituents in 

 the water. Accordingly, it appears likely that the standard deviation of dissolved boron (relative to the 

 long-term mean boron concentration) may be greater than that of the major cations (sodium, potassium, 

 and magnesium) and anions (sulphate, bicarbonate, and chloride) around their respective long-term 

 mean concentrations. 



The relationship between boron and specific conductance applied to data collected from 1974 to 2002 is 

 as follows: 



Boron = (0.00129 x specific conductance) - 0.04709 

 (R^ = 0.57, n = 617) 



The daily boron values, as generated by linear regression, for the period January 1990 through 

 December 2003 are shown in Figure 3.8. 



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