2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/06/2017 | 9:45 AM - 10:00 AM | ANALYSIS OF TOXIC CYANOBACTERIA OCCURRENCES IN THE LOWER HAN RIVER, KOREA | 306B
ANALYSIS OF TOXIC CYANOBACTERIA OCCURRENCES IN THE LOWER HAN RIVER, KOREA
In 2015, severe harmful algal bloom occurred in the lower section of the Han River, that passes through Seoul City, the capital of Korea. Intensive analyses were carried out to investigate characteristics of the issue, possible reasons and counter measures for the problem. The study site can be divided into upper stream drinking water intake area and downstream wastewater discharge area. Peak occurrences of diatom, green algae and cyanobacteria were found in early spring, early summer and late summer, respectively. While reduced discharge from the Paldang Dam, the headwater for the study site, due to drought was considered to be one of the major reasons for the problem, effects of other factors such as pollutant loadings from boundaries or instream structures can contribute to the water quality problem as well. However, no significant correlation could be found for cyanobacteria cells/ml with Chl-a concentrations and also with other factors such as nutrient concentrations or temperature. Non-toxic cyanobacteria were dominant in the upper stream area where water quality is cleaner while toxic cyanobacteria were dominant in the lower part of the stream.
- C24 Eutrophication
- C20 Climate Change
- S20 Understanding physical controls on cyanobacteria dominance: toward prediction and prevention
Presentation:
This presentation has not yet been uploaded.
Handouts:
Handout is not Available
Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference
Presenters/Authors
Dongil Seo
(), Chungnam National University, seodi@cnu.ac.kr;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Jaeyoung Kim
(), Chungnam National University, xth0218@naver.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -
Tongeun Lee
(), Chungnam National University, kail11@naver.com;
ASHA DISCLOSURE:
Financial -
Nonfinancial -