| Title |
A Study on the Relationship between Cyanobacteria and Environmental Factors in Yeongcheon Lake |
| Authors |
이현미 ( Hyeon-mi Lee ) ; 신라영 ( Ra-young Shin ) ; 이정호 ( Jung-ho Lee ) ; 박종근 ( Jong-geun Park ) |
| DOI |
https://doi.org/10.15681/KSWE.2019.35.4.352 |
| Keywords |
Cyanobacteria; Data mining; HABs(Harmful Algal Blooms); Yeongcheon Lake |
| Abstract |
The purpose of this study is to analyze the characteristics and correlations of the Yeongcheon Lake in order to reduce the occurrence of harmful cyanobacteria. In this study, we investigated the water quality and phytoplankton of the lake from May to November in 2017. Correlation and data mining analyseswere performed to analyze the relationship between the two factors. The water temperature was lowest at the point where the Yeongcheon Lake inflow occurs at Imha Lake. It was highest at the point where the outflow occurs to Angye Lake. The pH was also highest at the outflow point, but in the case of DO, it was highest at the midpoint between the inflow and outflow. The main cyanobacteria that emerged during the study period were Oscillatorialimosa, Microcysti saeruginosa and Aphanizomenon flos-aquae. As a result of correlation analysis, the water temperature, inflow, COD loading, TOC loading at the inflow point of the Yeongcheon Lake were the items that were related to the harmful cyanobacteria. The data mining analysis indicated that the TP loading and harmful cyanobacteria in the inflow point of the Yeongcheon Lake were influential on the detrimental cyanobacteria in the Yeongcheon Lake outflow point. When the TP loading was less than 39.0 kg/day at the inflow site, it wasexpected that the amount of harmful cyanobacteria could be maintained below 10,000 cells/mL. |