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보분: 폐광산 지역의 유출수에 대한 이?화학적 수질특성 및 Enclosure 어류 노출시험 평가
안광국 ( Kwang Guk An ),배대열 ( Dae Yeul Bae ),한정호 ( Jeong Ho Han ) 한국하천호수학회 2012 생태와 환경 Vol.45 No.2
The objectives of this study were to evaluate the physico-chemical water quality, trophic and tolerance guilds in the control (Co) and impacted streams of the abandoned mine, along with the ecological health, using a multimetric health model and physical habitat conditions of Qualitative Habitat Evaluation Index (QHEI), during the period of three years, 2005~2007. Also, eco-toxicity (EEt) enclosure tests were conducted to examine the toxic effects on the outflows from the mine wastewater, using the sentinel species of Rhynchocypris oxycephalus, and we compared the biological responses of the control (Co) and treatment (T) to the effluents through a Necropybased Health Assessment Index (Nb-HAI). Tissue impact analysis of the spleen, kidney, gill, liver, eyes, and fins were conducted in the controlled enclosure experiments (10 individuals). According to the comparisons of the control (Co) vs. the treatment (T) in physicochemical water quality, outflows from the abandoned mine resulted in low pH of 3.2, strong acid wastewater, high ionic concentrations, based on an electrical conductivity, and high total dissolved solid (TDS). Physical habitat assessments, based on Qualitative Habitat Evaluation Index (QHEI) did not show any statistical differences (p¤0.05) in the sampling sites, whereas, the Mm-EH model values in a multimetric ecological health (Mm-EH) model of the Index of Biological Integrity (IBI), using fish assemblages, were 16~20 (fair condition) in the control and all zero (0, poor condition) in the impacted sites of mine wastewater. In addition, in enclosure eco-toxicity (EEt) tests, the model values of Nb-HAI ranged between 0 and 3 in the controls during the three years, indicating an excellent~good condition (Ex~G), and were ¤100 (range: 100~137) in the impacted sites, which indicates a poor condition (P). Under the circumstances, organ tissues, such as the liver, kidney, and gills were largely impaired, so that efficient water quality managements are required in the outflow area of the abandoned mine watershed.
국내 182개 농업용 저수지의 TSI지표 분석을 통한 주요 영양물질과 엽록소 변동연구
안광국 ( Kwang-guk An ),( Md. Mamun ) 한국환경생태학회 2016 한국환경생태학회 학술대회지 Vol.2016 No.2
The main objectives of this study was to determine how Asian monsoon influences nutrient regime, suspended solids, and algal chlorophyll (CHL) in 182 agricultural reservoirs, based on the dataset of 2013, and then to develop the empirical models of TN - CHL and TP - CHL for predicting the eutrophication of the reservoirs. The intensity of Asian monsoon greatly determined the ambient concentrations of N and P. Most of the Korean agricultural reservoirs based on ambient nutrient concentrations were nitrogen - rich and phosphorus contents were relatively low, indicating a potential P - limiting system. Regression analysis of empirical model showed that CHL had a high linear relation with TP but a weak relation with TN. Seasonal empirical models of TP-CHL showed that the regression coefficients in premonsoon (R<sup>2</sup> = 0.605) and postmonsoon (R<sup>2</sup> = 0.554) were greater than that during the monsoon. Thus, CHL concentrations at a unit phosphorus were reduced during the monsoon season . In contrast, the regression coefficients of CHL - TN were low in all the seasons (R<sup>2</sup> < 0.07). Indicating that values of CHL showed a high positive functional relation (R<sup>2</sup> = 1.00) with non - algal light attenuation coefficient (Kna). Values of Trophic State Index (TSI) implied that phosphorus limitation was severe in the Korean agricultural reservoirs. Overall, the reservoir study suggested that phosphorus should be controlled for the reservoir conservation [TSI (CHL)-TSI (SD) < TSI (CHL) - TSI (TP)] according to the analysis of Trophic Sate Index Deviation (TSID).