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지류의 수질이 금호강 본류의 수질에 미치는 영향에 관한 연구
양득석 ( Duk Seok Yang ),배헌균 ( Hun Kyun Bae ) 한국환경과학회 2012 한국환경과학회지 Vol.21 No.10
In this study, how branches of Kumho River affect to the water quality on Kumho River was investigated. Water samples from six sampling points at Kumho River and three at each branch were taken from Dec. 2009 to Dec. 2011. As results, Namcheon affected BOD and T-P concentrations on Kumho River while Sincheon did only T-P concentrations. However, the water quality of Kumho River was improved because of Sincheon in terms of BOD and COD concentrations. This was the results from management of Sincheon wastewater treatment facility and Jisan wastewater treatment facility which might be the best example for managing wastewater treatment facilities. Dalsecheon would not affect the water quality of Kumho River although it had bad conditions of water quality because of lack of its water quantity comparing to Kumho River`s.
수치모형을 이용한 금호강 수계 내 4-Nitrophenol의 거동 모의 및 잠재 오염원의 영향 분석
박경덕 ( Kyeong-deok Park ),신동석 ( Dong-seok Shin ),양득석 ( Duk-seok Yang ),이인정 ( Injung Lee ),임영경 ( Young-kyong Lim ),김일규 ( Il-kyu Kim ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.2
For areas with the diverse contamination sources, the change of 4-nitrophenol contamination and impact of potential contamination sources have been evaluated using monitoring data and a numerical model (HydroGeoSphere). The model considered several parameters including land cover, precipitation, and flow rate. And, the model has been performed to investigate the effect of decay rate of 4-nitrophenol. The results of the simulations showed that the influence on 4-nitrophenol in downstream was mainly greater than that in upstream, and the tributaries did not significantly affect the mainstream because of their low flow rates. In addition, the effect of contamination sources was simulated for each section, then the measured data were higher than the corresponding simulated data in most sections of the Geumho river. In particular, the impact of the potential contamination sources in the upstream area was much higher than that in the other area, thus more monitoring data for the upstream area is required.
이헌준(Heon-Jun Lee),김희영(Hee-Young Kim),김기용(Ki Yong Kim),양득석(Duk-Seok Yang),이인정(Injung Lee),임영경(Young-Kyong Lim),김재혁(Jae-Hyuk Kim),오정은(Jeong-Eun Oh) 대한환경공학회 2017 대한환경공학회지 Vol.39 No.7
본 연구는 낙동강 본류와 연계한 지천중심을 대상으로 항생제(clarithromycin, sulfathiazole, sulfamethazine, sulfamethoxazole, trimethoprim), 항정간제(carbamazepine), 진통제(acetylsalicylic acid, naproxe)를 포함한 8종의 의약물질의 현황 및 시기별 변화에 대해 조사를 실시하였다. 조사 대상물질의 검출 수준은 <LOQ에서 1.076 μg/L까지 나타났으며, 조사 대상물질에서 clarithromycin (0.0316 μg/L)이 가장 높은 평균 농도로 검출되었고, 다음으로 sulfamethazine (0.0170 μg/L), sulfamethoxazole (0.0161 μg/L), naproxen (0.0129 μg/L), carbamazepine (0.0093 μg/L), acetylsalicylic acid (0.0047 μg/L), sulfathiazole (0.0024 μg/L), trimethoprim (0.0022 μg/L) 순으로 나타났다. 낙동강 수계의 지점별 검출 수준은 하류의 농도수준이 상류의 검출 농도보다 상대적으로 높게 나타났다. 2월 조사시기에서 높은 검출 수준을 보였으나, 시기별 차이는 뚜렷하게 나타나지 않았다. 대상 의약물질 8종의 유해지수를 산정한 결과 모두 1보다 낮은 값을 나타내어 낙동강 수계에 미치는 생태위해성은 낮은 것으로 평가되었으나 추후 본 연구대상 물질 외 사용되고 있는 다른 의약물질로 확장 한 연구가 더 수행될 필요가 있는 것으로 판단된다. In this study, the occurrence and temporal variation of eight pharmaceuticals comprising antibiotics (clarithromycin, sulfathiazole, sulfamethazine, sulfamethoxazole, trimethoprim), scabicide (carbamazepine) and nonsteroidal anti-inflammatory drugs (acetylsalicylic acid, naproxen) in main stream and its tributary of the Nakdong River basin, were investigated. Concentrations of the target compounds ranged from <LOQ to 1.076 μg/L. The highest average concentration was observed for clarithromycin (0.0316 μg/L), followed by sulfamethazine (0.0170 μg/L), sulfamethoxazole (0.0161 μg/L), naproxen (0.0129 μg/L), carbamazepine (0.0093 μg/L), acetylsalicylic acid (0.0047 μg/L), sulfathiazole (0.0024 μg/L) and trimethoprim (0.0022 μg/L). The decreasing pattern of pharmaceutical concentrations was observed along with Nakdong River and the higher concentrations in downstream were observed than those in upstream. There was no temporal variation of the target compounds although the highest level was found in February. The calculated hazard quotients (HQs) for eight pharmaceuticals were below 1, indicating no environmental hazard in Nakdong River. However, further monitoring is still needed due to the other pharmaceuticals widely used in Korea.
통계적 경향 분석을 통한 남강 본류의 수질 장기 변동 해석
정강영 ( Kangyoung Jung ),안정민 ( Jung Min Ahn ),이인정 ( In Jung Lee ),양득석 ( Duk Seok Yang ),신동석 ( Dong Seok Shin ) 한국농공학회 2016 한국농공학회 학술대회초록집 Vol.2016 No.-
본 연구는 남강 본류에서 2005년부터 2014년까지 남강댐 상류와 남강댐 하류에 있는 총 9개 수질관측지점의 BOD와 TP자료에 대해서 장기 경향 분석을 계절 맨-켄달 검정법과 LOWESS 분석법을 이용해서 실시했으며, 남강 본류 총 9개 지점의 BOD 자료에 대해서 계절 맨-켄달 검정법과 LOWESS 분석법으로 장기 경향 분석을 실시한 결과 9개 지점 중 남강B, 남강C, 남강1, 남강2 등 4개 지점은 경향성이 없는 것으로 나타났고, 남강A, 남강D, 남강3, 남강4, 남강E 등 5개 지점은 감소하는 추이를 나타냈다. 하지만 LOWESS 결과에서 남강A, 남강B, 남강C, 남강1, 남강2 지점은 2011년도와 2012년도 이후부터 다시 증가하고 있는 추이를 나타냈다. TP의 경우 계절 맨-켄달 검정 결과 남강A를 제외한 8개 지점 모두 감소하는 경향으로 나타났다. LOWESS 결과에서는 남강A, 남강B, 남강C를 제외한 6개 지점이 명확한 감소 추이를 보이는 것으로 나타났다. 따라서 비모수적통계분석 기법인 계절 맨-켄달 검정법 (Seasonal Mann-Kendall Test)과 LOWESS (Locally Weighted Scatter plot Smoother)경향분석을 함께 사용하여 남강에서 BOD와 TP 농도 추이를 분석해 본 결과 대부분 일정한 수질을 유지하거나 감소하는 추이를 나타내고 있으며, 결과적으로 남강 본류에서 BOD와 TP는 감소하거나 일정한 농도로 유지 및 관리되고 있는 것으로 사료된다. In this study, it was analyzed the trend through Seasonal Mann-Kendall Test and Locally Weighted Scatter Plot Smoother using the recently observed concentration of BOD and TP, which were monthly water quality data for total 9 water quality monitoring points from 2004 to 2015, for 12 years in the Nam River. As a result of analysis, BOD of Nam-A showed a tendency to decrease and BOD of Nam-B showed no trend, which were located upstream from the Namgang Dam. BOD of 5 points except for Nam-C and Nam-1 showed a tendency to decrease, which were located downstream from the Namgang Dam.
김해시 물 순환 개선 도시계획에 의한 비점오염물질 저감효과 분석
정강영 ( Kang-young Jung ),김신 ( Shin-kim ),권헌각 ( Hun-gak Kwon ),양득석 ( Duk Seok Yang ),김교식 ( Kyosik Kim ),장광진 ( Kwang-jin Jang ),신동석 ( Dong-seok Shin ),안정민 ( Jung-min Ahn ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.11
This study was performed to analyze the effects of a water circulation green area plan on non-point source pollution in Gimhae South Korea. A quantitative analysis of Arc-GIS data was conducted by applying a watershed model based on Fortran to investigate the changes to direct runoff and pollution load. Results showed that prior to the implementation of the water circulation green area plan in Gimhae, direct runoff was 444.05 m<sup>3</sup>/year, total biological oxygen demand (BOD) pollution load was 21,696 kg/year, and total phosphorus (TP) pollution load was 1,743 kg/year. Implementation of the development plan was found to reduce direct runoff by 2.27%, BOD pollution load by 1.16% and TP pollution load by 0.19% annually. The reduction in direct runoff and non-point source pollution were attributed to improvements in the design of impermeable layers within the city.
액체크로마토그래피-텐덤질량분석법에 의한 하천수 중 남조류 독소 7종의 동시분석
이인정 ( Injung Lee ),김진아 ( Jina Kim ),안정민 ( Jung Min Ahn ),양득석 ( Duk-seok Yang ) 한국환경분석학회 2018 환경분석과 독성보건 Vol.21 No.2
Water blooms, formed by cyanobacteria such as Microcystis, Aphanizomenon, and Anabaena have been occurring frequently in lakes and rivers in Korea. As such, there is a need to develop a sensitive method to determine cyanobacterial toxins to minimize potential hazards in raw water resources. In this study, we developed a highly sensitive analytical method for seven cyanobacterial toxins (microcystin-LR, -RR, -YR, -LA, anatoxin-a, nodularin, and cylindrospermopsin) using liquid chromatography-tandem mass spectrometry (LCMS/ MS) with direct injection. The method was evaluated in terms of calibration curve linearity, limit of detection, limit of quantitation, accuracy, and precision. The limit of detection and limit of quantitation were in the range of 0.010-0.026 μg/L and 0.030-0.081 μg/L, respectively. Good accuracy and precision was also obtained. The optimized method was used to measure the concentrations of the seven cyanobacterial toxins in river water from Nakdong River, and microcystin-RR, -YR, and -LR were detected.
금호강 수계 지류하천의 수질 특성 평가 및 수질개선 등급화 방안
정강영 ( Kang Young Jung ),안정민 ( Jung Min Ahn ),김교식 ( Kyosik Kim ),이인정 ( In Jung Lee ),양득석 ( Duk Seok Yang ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.6
In this study, we analyzed on-site monitoring data for 15 tributaries in Geumho watersheds for 3 years (2011-2013) in order to sort out priorities on water quality characteristics and improvement. As a result of estimating contribution to contamination of the tributary rivers, Dalseocheon showed the highest load densities, despite the smallest watershed area, with 22.7% BOD5, 30.7% CODMn, 31.3% TOC and 47.6% TP. After conducting PCA (principal component analysis) and FA (factor analysis) to analyze water quality characteristics of the tributary rivers, the first factor was classified as CODMn, TOC, EC, TP and BOD5, the second factor as pH, Chl-a and DO, the third factor as water temperature and TN, and the fourth factor as SS and surface flow. In addition, arithmetical sum of each factor’s scores based on grading criteria revealed that Dalseocheon and Namcheon were classified into Group A for their highest scores - 96 and 93, respectively -, and selected as rivers that require water environmental management measures the most. Also, water environmental contamination inspection showed that Palgeocheon had the most number of aquatic factors to be controlled: BOD5, CODMn, SS, TOC, T-P, Chl-a, etc.
토지피복별 비점부하량 기여율 해석을 위한 분포형 모델 개발 및 적용
안정민 ( Jung-min Ahn ),정강영 ( Kang-young Jung ),김신 ( Shin Kim ),이혜진 ( Hae-jin Lee ),신석호 ( Suk-ho Shin ),양득석 ( Duk-seok Yang ),신동석 ( Dongseok Shin ),나승민 ( Seung-min Na ) 한국물환경학회(구 한국수질보전학회) 2017 한국물환경학회지 Vol.33 No.1
Water quality monitoring network data is being affected continuously due to non-point source pollution arising from agricultural land located on the Gwangsancheon outlet in the Nakdong River basin. In this study, we have performed analysis of water quality monitoring system, water quality pattern using SOM and water quality in the Gwangsancheon for sub-basin located at Gisan-myeon in the Nakdong River basin. We developed and applied the model to estimate the runoff and non-point source loading. As a result of SOM pattern, the effect of non-point source pollution was the largest in the paddy fields and fields. As a result of the developed model, we found contribution rate and reduction rate for non-point source loading according to change of landuse because the reduction effect of nonpoint pollutants was 20.9% of SS, 9.9% of TN, 21.2% of TP and 8.9% of TOC depending on the landuse change.
안정민 ( Jung-min Ahn ),정강영 ( Kang-young Jung ),김경훈 ( Gyeonghoon Kim ),권헌각 ( Heongak Kwon ),양득석 ( Duk-seok Yang ),신동석 ( Dongseok Shin ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.5
Recently IPCC (International Panel on Climate Change, 2007) pointed out that global warming is a certain ongoing process on the earth, due to which water resources management is becoming one of the most difficult tasks with the frequent occurrences of extreme floods and droughts. In this study we made runoff predictions for several control points in the Geum River by using the watershed runoff model, SSARR (Streamflow Synthesis and Reservoir Regulation Model), with daily RCP 4.5 and RCP 8.5 scenarios for 100 year from 1st Jan 2006 to 31st Dec 2100 at the resolution of 1 km given by Climate Change Information Center. As a result of, the Geum River Basin is predicted to be a constant flow increases, and it showed a variation in the water circulation system. Thus, it was found that the different seasonality occurred.