상수원에서 바이러스와 분변오염지표세균의 계절변동 = Seasonal variation of total culturable viruses and indicator bacteria in drinking water sources

다국어 초록 (Multilingual Abstract)

Investigating seasonal variation of enteric viruses in source of water supply and its relationships with indicator bacteria and other physicochemical parameters are of highly importance, especially in Korea, where climatic change is extremely high due to the distinct four season and concentrated summer precipitation. We performed the quantitative study on the seasonal variation of virus and indicator organisms in three sites of H, K, and D: the sites H and K were chosen as the fecally contaminated, and the site D was done as the less contaminated. Samples were collected monthly or bimonthly for 14 months from April, 1999 to May, 2000. Total culturable viruses on Buffalo green monkey(BGM) kidney cell and six potential indicating bacteria such as E. coli, fecal coliforms(FC). total coliforms(TC), Clostridium perfringens(CP) spore, heterotrophic plate counts(HPC), aerobic spore formers(ASF) were analyzed along with general physicochemical parameters. In the less contaminated site D₁ viruses were never detected in 100L samples. However, in the fecally contaminated sites of H and K , viruses were detected in most of the samples and were highly variable. The levels of viruses tended to be raised in cold season and were also showed significantly negative correlation with temperature. When the occurrence of viruses were compared with the indicating bacteria, only CP showed significantly positive correlation with virus at both sites. Traditional indicators of fecal contamination such as TC, FC, and E. coli did not show any relations with viruses, which was coincident with the previous studies.