1 DO 1986 1987 1991 1992 1993 1994 DO mg/l 7.43 11.01 10.11 9.00 8.67 2 DO COD DO mg L A B C D E COD mg/l 1991 4 7 10.89 12.40 11.20 12.75 12.00 4.78 11 1991 7 15 10.32 10.47 9.65 10.37 10.00 5.23 16
1 325 45 5350 176.44 2 1 2 3 1.8 2.7 3.2 7.7 0.4 0.6 0.6 1.6 0.3 0.2 0.7 6.3 9.3 14 29.6 0.5 0.45 0.8 1.75 0.4 0.45 0.6 1.45 0.2 0.6 0.4 1.2 0.2 0.6 0.2 1 10 15 20 45 A 3 B C 1.215 7.5 7 15.715 2.05 3.5 1.5 7.05 3.9 0 0 3.9 1.3 0 0 1.3 12 50 80 142 0.2 0.1 0.3 0.6 0.3 2.7 0 3 0.075 0.5 0.05 0.625 0.6 0.15 0 0.75 0 1.5 0 1.5 21.64 65.95 88.85 176.44