Table 1. One-factor characteristics of dependence of plankton and periphyton ecological state on polluting compounds
|
Factors |
N |
N1 |
N2 |
min |
ETL |
max |
Exactness % |
Completeness % |
|
Biological oxidation Ammonium Nitrites Oil products Phenols Detergents Copper Water flow Zinc Chrome Pesticides Temperature |
231 231 231 231 231 231 225 231 173 9 110 77 |
116 116 116 116 116 116 114 116 93 0 64 46 |
115 115 115 115 115 115 111 115 80 9 46 31 |
1.030 0.007 0.004 0.015 0.000 0.000 0.001 8.000 0.000 0.005 0.000 8.000 |
5.3869 0.9861 0.1994 0.6299 0.0093 0.1227 0.0166 177.4800 0.0920 0.0050 0.0860 12.5333 |
9.000 7.350 0.920 2.020 0.017 0.200 0.070 231.000 0.150 0.016 0.150 18.000 |
77 75 76 75 75 75 78 80 75 100 100 100 |
15 37 11 23 10 13 13 7 4 100 2 3 |
Note to table 1
N = number of observations; N1 = number of normal observations; N2 = number of abnormal observations; Min is the minimum factor value for the period of observation; Max is the maximum factor value for the period of observation; ETL is the ecologially tolerable level of the factor. The Criteria of exactness and completeness are defined in the text. Units: pesticides - mg l-1, temperature - oC, the other factors - mg l-1.