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Impact of a Flushing Discharge from an Upstream Dam on the NH-N Concentrations during Winter Season in Geum River : Impact of a Flushing Discharge from an Upstream Dam on the NH-N Concentrations during Winter Season in Geum River
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상류 댐 플러싱 방류가 금강의 겨울철 암모니아성 질소 농도 저감에 미치는 효과분석

논문 기본 정보

Type
Academic journal
Author
Chung, Se Woong (충북대학교 환경공학과) Kim, Yu-kyung (충북대학교 환경공학과)
Journal
한국물환경학회 수질보전 수질보전 제21권 제6호
Published
2005.1
Pages
609 - 616 (8page)

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Impact of a Flushing Discharge from an Upstream Dam on the NH-N Concentrations during Winter Season in Geum River : Impact of a Flushing Discharge from an Upstream Dam on the NH-N Concentrations during Winter Season in Geum River
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A high ammonia nitrogen ($NH_3-N$) concentration has been recursively observed every winter season in Geum River, which hindered chemical treatment processes at a water treatment plant. A flushing discharge from Daecheong Dam was often considered to dilute $NH_3-N$, but information on the quantitative effect of flushing on the downstream water quality was limited. In this study, the impact of a short-term reservoir flushing on the downstream water quality was investigated through field experiments and unsteady water quality modeling. On November 22, 2003, the reservoir discharge was increased from $30m^3/sec$ to $200m^3/sec$ within 6 hours for the purpose of the experiment. The results showed that flushing flow tends to reduce downstream $NH_3-N$ concentrations considerably, but the effectiveness was limited by flushing amount and time. An unsteady river water quality model was applied to simulate the changes of nitrogen concentrations in response to reservoir flushing. The model showed very good performance in predicting the travel time of flushing flow and the effect of flushing discharge on the reduction of downstream $NH_3-N$ concentrations at Maepo and Geumnam site, but a significant discrepancy was observed at Gongju site.
#Flushing discharge #Ammonia nitrogen #Unsteady river water quality model #River water quality management

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