10 



oil 

 g 



Q 



1200 

 1 100 

 1000 



poo 



800 

 700 

 600 - 

 500 



400 



J I 1 I I ^ L 



1994 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1995 



Month 



Figure 3.3 TDS Concentrations for 1994 Grab Samples from East Poplar River 

 at International Boundary. 



tiO 



a. 



1 — ' — I — '■ — i — ■■ — r 



from sample analysis 

 from regression 



_L_j I I L 



1975 1976 1977 1976 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1993 1993 1994 1995 



Year 



Figure 3.4 Thiree-IVIonth Moving, Fiow-Weighited TDS Concentration for East 

 Poplar River at International Boundary. 



