31 



shown in Table 3.5 differ significantly which illustrates the difficulty of obtaining accurate 



measurements of small discharges using conventional current-meter methods. The theoretical 

 discharge of the 90° V-notch weir--0.052 m^/s--was used in the computations. 



Table 3.5 Streamflow Measurement Results for November 3, 1994 



3.6.2 Water Quality 



Quality-control sampling was carried out at the East Poplar River at International Boundary on July 

 13, 1994. Participating agencies included the U.S. Geological Survey, Environment Canada, 

 Saskatchewan Environment and Resource Management, and SaskPower Corporation. 



Sets of triplicate samples were split from U.S. Geological Survey sampling churns and submitted to 

 the respective agency laboratories for analyses. Field procedures were identical to those used since 

 1986. 



Most parameters showed acceptable reproducibility within and between sets of triplicates. Only the 

 variables for which corrective action should be considered are discussed here. 



Laboratory specific conductances showed interagency variability with values ranging from 1 395 to 

 1 480 M^S/cm. Total phosphorus ranged from 0.02 to 0.07 mg/L with one lab being biased high 

 compared to the other three. One lab had a TKN range of 0.55 to 1.66 mg/L. The NFR results 

 indicate that one lab is biased low by one-half compared to the other two reporting labs. Ammonia 

 showed a large variation in results, ranging from <0.01 to 0.12 mg/L and two labs had noticeable 



