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RISS 인기검색어
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- 저자 : 송미경(Mi Koung Song) (검색결과 2 건)
- 무료
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박해식(Hae Sik Park),박청길(Chung Kil Park),송미경(Mi Koung Song),백경훈(Kyung Hoon Baek),신성교(Sung Kyo Shin) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.6
The study was conducted to evaluate water quality utilizing factor analysis in the Nakdong River. The relationships between BOD concentration and flow rate, weighted BOD concentration which it was considered BOD load and flow rate, show that water quality in the lower stream is affected by flow rate, especially, in winter and spring. The three factors derived from the factor analysis explained 75.0% of the variability within the data. Factor I (44.0%) was artificial pollution pattern by domestic sewage and industrial wastewater. Factor II (19.2%) was metabolism pattern. Factor III (11.75%) was hydrological variation pattern. The upper stream was influenced of hydrological factor and the water clarity in the middle stream was related to artificial pollution. The lower stream including Mulgum was strongly affected by the metabolised factor.
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낙동강 중 , 하류수역에서 클로로필 α 최대농도 출현지역 평가
신성교(Sung Kyo Shin),백경훈(Kyung Hoon Baek),송미경(Mi Koung Song) 한국하천호수학회 2002 생태와 환경 Vol.35 No.1
The frequent occurrence of excessive phytoplankton populations in the downstream Nakdong River has been an important water quality problem in recent years. The limnological survey of the Nakdong River was conducted from January 1997 to December 1999 on once or twice per month. A typical phenomenon of eutrophication appears with the persistent algal bloom due to high nutrients in the mid-lower part of the river. This study showed that the point at which Chl. a concentration reaches maximum was affected by the water temperature and the flow rate. For example, Chl. a concentration reached maximum after around 380, 240 and 120 hours which were estimated from the time of flow at low(≤10℃), mean(10∼20℃) and high(≥20℃) water temperature conditions, respectively. It was estimated that increase coefficients of phytoplankton (Chl. a) on the water temperature are 0.201, 0.254 and 0.289 day^-1, on the contrary, decrease coefficients are -0.012, -0.128 and -0.193 day^-1 in low, mean and high water temperature. therefore, to prevent formation of Chl. a maximum concentration in the specific water resource, it is necessary to increase the discharge of dam as well as to decrease.
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