The physicochemical environmental factors, DAIpo and TDI were investigated and analyzed statistically to assess the biological water quality at Dal-steam and Bkha-stream of South-Han river in from Jun. 2008 to Mar. 2009 . As the result, both rivers we...
The physicochemical environmental factors, DAIpo and TDI were investigated and analyzed statistically to assess the biological water quality at Dal-steam and Bkha-stream of South-Han river in from Jun. 2008 to Mar. 2009 . As the result, both rivers were mostly in good condition having BOD concentrations of below 3㎎·ℓ-1 except for some sites.
The values of DAIpo and TDI were ranged from 3.4 to 93.1 and from 28.2 to 99.9 respectively. From the biological water quality assessment, DAIpo and TDI in both rivers showed fair to fairly poor quality of water. The two values showed to be in more polluted conditions than the values of BOD. Also, because the result of DAIpo has wider range of difference, DAIpo appears to be more sensitive to the change in water quality. The main physicochemical factors of two rivers were Chl. a, TN, and TP, having the value of 0.92 in the statistical analysis, showed to have the greatest correlation with TDI and DAIpo.
Reexamination of indicators, Nitzschia palea and Diatoma vulgare is suggested due to having low correlation with other indicators from the result of Principle Component Analysis.