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Characteristics of Water Quality and Evaluation of Eutrophication for Reservoirs in Kunsan
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 Title & Authors
Characteristics of Water Quality and Evaluation of Eutrophication for Reservoirs in Kunsan
Kim, Jong-Gu; O, Seung-Chul;
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 Abstract
Recently, eutrophication or lake and reservoir has become serious problem to man who want use that water for several purpose. In order to solve the eutrophication problem, the trophic state of that eutrophic lake and reservoir should be measured properly. For the purpose of this, various method to indicate the trophic state of lake and reservoir was developed by many researchers. This research was conducted to evaluate characteristics and eutrophication of water qualitymfor small scale reservoir in Kunsan. On-site investigation to 5 reservoirs and laboratory experiment were carried out during four seasons from November, 2003 to July, 2004. Twelve items measured field ana a laboratory. Measured data was analyzed to quantitative method by multivariate approach and eutrophication index. The result is summarized as following. 1) Showing the characteristics of water quality for reservoir in Kunsan, Okgu reservoir and Oknua reservoir was exceeded 4 grades of agricultural water standard in TP, TN and COD. This means that eutrophication was gone much, therefore, water-purity control of reservoir need. While, Mije reservoir that is used to Kunsan citizens' recreation was good in water quality. But, water quality exceeded 4 grades of agricultural Dater standard sometimes. 2) As a results of correlation analysis between variables of water qualify, Interrelation between variables which is connected with eutrophication was expressed good relationship as above 6.000 in correlation coefficients. The correlation coefficient(r) between COD and chlorophyll-a, total phosphorus and chlorophyll-a, total nitrogen and chlorophyll-a were 0.750, 0.720 and 0.600 respectively. Therefore, Change of water quality can grasp according to eutrophication progress degree. 3) If do evaluate to eutrophication by quantitative method which is proposed by OECD, US-EPA and Forsberg & Ryding, in the case of chlorophyll a, Okgu, Oknua and Daewi reservoir was eutrophic state and Mije and Geumgul reservoir was mesotrophic state. But, estimation by TN and TP showed highly eutrophic state (hypereutrophic) in all reservoirs. 4) If do evaluate by eutrophication index which is Carlson's TSI, revised carlson TSI and Walker's index, in the case of chlorophyll a, TSI values of Okgu, Oknua and Daewi reservoir is eutrophic state more than 50 and Mije and Geumgul reservoir was mesotrophic state as range of in TSI value. But, in the case of TP as nutrients, all reservoirs showed highly eutrophic state which was exceed to 70 in TSI value. According to above results, the water quality for small scale reservoirs in Kunsan is progressing by trophic state. therefore, for continuous use as agriculture water, we had better do establishment of management plan about water quality.
 Keywords
Reservoir;Eutrophication;Carlson's TSI;Revised Carlson TSI;Walker's Index;
 Language
Korean
 Cited by
1.
소규모 생태연못(원흥이 방죽)의 부영양화 평가,이흥수;정세웅;최정규;신상일;

한국물환경학회지, 2008. vol.24. 6, pp.741-749
2.
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생태와환경, 2009. vol.42. 2, pp.242-252
3.
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한국물환경학회지, 2009. vol.25. 5, pp.742-749
4.
대청호에서의 단기 영양염 첨가 실험 및 제한 영양염류 분석,이상재;안광국;

생태와환경, 2010. vol.43. 1, pp.136-141
5.
주남저수지 유역의 오염원과 수질변동에 따른 식물플랑크톤 군집,이혜진;서정관;정현기;탁보미;이재관;

Journal of Environmental Science International, 2010. vol.19. 11, pp.1445-1456 crossref(new window)
6.
대청호의 부영양화 특성 및 주요 변수들의 상관성,이재운;김지연;현길수;

수처리기술, 2010. vol.18. 4, pp.35-42
7.
동복호 저수구역내 주요 침수 분포종별 생육 및 영양염류 함량,서영진;이준배;서동철;강세원;이상규;최익원;임병진;김상돈;허종수;조주식;

한국토양비료학회지, 2012. vol.45. 5, pp.836-841 crossref(new window)
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