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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.
분자수준의 바이어마커로 부터 군집수준의 바이오인디케이터의 다변수체계를 이용한 통합적 하천 생태 건강도평가 기법
안광국 ( Kwang Guk An ) 한국환경생태학회 2016 한국환경생태학회 학술대회지 Vol.2016 No.1
The integrative approach for ecological stream health assessments was applied to a stream ecosystem using a multi-level organization from molecular level of biomarkers to community levels of bioindicators along with analysis of physical and chemical stressors. Water quality parameters of BOD, COD, TN, and TP etc were measured and physical habitat health, based on Qualitative habitat Evaluation Index (QHEI) model were analyzed. Also, Ecological stream health model, based on index of biological integrity (IBI) by fish assemblage, was developed for regional assessments and then applied to the stream. Six metric attributes of original 11 metrics were modified for a development of the model. Biomarkers of comet assay, blood chemistry, physiological parameters, and bioindicators such as organismal-, population-, community- level parameters were evaluated in this study along with eco-toxicity tests. Some stations impaired (stressed) in terms of stream health were identified by the IBI approach and also major key stressors affecting the health were identified using BOD, TN, TP, physical habitat evaluation, and eco-toxicity tests. The assessment approach of integrative ecological stream health would be used as a key tool for ecological restorations and species conservations in the degraded stream ecosystems and applied for elucidating major causes of ecological disturbances. Ultimately, this approach provides us an effective management strategy of stream ecosystems through establishments of ecological networks in various watersheds. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2013R1A1A4A01012939).
안광열(An Kwang Yeol),임종권(Lim Jong Kwon),장형식(Jang Hyeong Sik) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The railroad construction is connected with a variety of engineering fields such as civil engineering, architecture engineering, electrical engineering, physics, machine engineering, and so on. Relatively longterm construction and periodical maintenance are necessary for the project. Civil appeal problems including environmental issue are occurred frequently. Value Engineering(VE) process especially in planning and design phase is essential in order to solve this problem. This paper is intended to propose a systematic design VE process of the railroad construction project. Standard VE manual developed by Korea Rail Network Authority is developed. This paper includes reviews of existing VE processes in order to provide an effective design VE process of the project. It is concluded that the suggested model for VE process may be useful for establishment of VE program of organizations.
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).