Station CODmn NH3-N TP Equation a b R2 Equation a b R2 Equation a b R2 M4 Power 17.52 -0.2497 0.34 Power 171.48 -0.8931 0.59 Power 0.7671 -0.178 0.08 M5 Power 0.7224 0.1911 0.10 Power 11.541 -0.4487 0.32 Linear 0.000003 0.1103 0.02 M7 Power 0.3098 0.3192 0.26 Power 14.337 -0.6304 0.34 Power 0.0115 0.3264 0.34 M8 Power 0.3818 0.2565 0.28 Power 0.3171 -0.0275 0.002 Linear 0.00002 0.0386 0.44

Table 3: Concentration-flow relationships for four stations.