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      • KCI등재

        간척담수호 저층퇴적물의 오염물질 용출특성

        정광욱,윤춘경,이인호,이승일,강수만,함종화,Jung, Kwang Wook,Yoon, Chun Gyeong,Lee, In Ho,Lee, Seung Il,Kang, Su Man,Ham, Jong Hwa 한국농공학회 2014 한국농공학회논문집 Vol.56 No.1

        Sediment pollutants have been considered an important source for the eutrophication of estuarine reservoir. In this study, the effects of pollutants released from bottom sediment to water column were investigated. Sediment samples were collected each two station from Namyang and Sukmoon estuarine reservoirs in August 2013. The fractionation result of sediment phosphorus indicated that Adsorbed-P ($36.7{\pm}8.84%$) and Nonapatite-P ($29.3{\pm}12.50%$) are the two dominant phosphorus groups in the sediments. For sediment release test, eight sets of acrylic chamber (0.3 m $diameter{\times}1m$ high, with 0.15 m sediment depth) were used with aerobic and anaerobic environment. Under anaerobic conditions, rates of $NH_4-N$ release from the sediments were highly variable, with final concentrations of $NH_4-N$ in the overlying water varying from between about 0.69~1.04 in Namyang and 2.58~4.23 mg/L in Sukmoon reservoir. The $NH_4-N$ release was active at the upstream around the confluence of tributary compared to downstream near the embankment. The $PO_4-P$ release was more obvious than $NH_4-N$ in anaerobic condition. The final $PO_4-P$ concentrations were approximately from two-fold to eight-fold higher than initial concentration. In terms of reservoir water quality management, not only tributary pollutants but also sediment nutrient loading is necessary to consider the water quality contribution.

      • KCI등재후보

        LID시설의 유출량 및 오염부하 저감효율평가를 위한 SWMM모델의 적용

        정광욱,정종석,박진성,현경학,Jung, Kwang-Wook,Jung, Jong-Suk,Park, Jin-Sung,Hyun, Kyoung-Hak 한국토지주택공사 토지주택연구원 2017 LHI journal of land, housing, and urban affairs Vol.8 No.4

        최근 도시의 확대와 팽창에 따라 불투수층 증가에 따른 물순환의 건전성 약화, 녹지 등 생태계의 파괴 등 사회적인 문제를 해결하기 위한 방안으로 LID 기법이 활용되고 있다. 본 연구에서는 신도시인 아산탕정 분산형 빗물관리 시범지구를 대상으로 SWMM 모텔을 구축하여 LID시설 적용 전후의 유출량 및 오염부하 저감효과에 대한 평가를 실시하였다. 2016년 강우를 대상으로 모의한 결과 배수구역 기준 12.2%, 집수구역 기준 62.0%의 유출저감효과가 있는 것으로 평가되었다. COD오염부하 저감효과 평가 결과 배수구역기준 15.5%, 집수구역 기준 74.9%, TP의 경우 배수구역기준 9.2%, 집수구역 기준 71.4%의 효율을 나타내었다. 아산탕정 지구 내에 설치된 4가지 시설물에 대한 효과분석 결과 효율은 식생수로가 가장 높고 측구형 침투시설이 가장 낮은 것으로 검토되었다. 하지만 이는 시설물의 개소수, 체적을 고려하지 않은 결과로 실제 시설물의 효율을 비교를 위해서는 시설물의 공극률을 고려한 체적을 산정하여 비교하는 것이 합리적이며, 집수면적당 시설물의 공극률을 고려한 체적(V/A)이 낮은 침투도랑 및 측구형 침투시설이 가장 낮은 효율을 나타내었다. SWMM 모델의 LID모듈을 이용하여 물순환 및 오염부하 저감효과를 검토한 결과 정량적인 해석이 가능하였으며, 다양한 시나리오의 검토를 통해 효과적인 LID시설을 설계하는데 활용 기능할 것으로 평가된다. Urbanization can be remarkable affected flood, pollutant loading, ecological system, and green infrastructure by distortion of hydrologic cycle. In order to mitigate these problems in urban, Low Impact Development(LID) technique has been introduced and applied in the world. SWMM model was calibrated with sets of field monitoring data and applied for calculation of runoff and pollutant loading in Asan-tangjung LID city under 2016 rainfall. Runoff reduction of watershed and catchment basins were showed efficiency 12.2% and 62.0%, respectively. Reduction of COD and TP loading also high efficiency in catchment basins were evaluated 74.9 and 71.4%. The results of this study can be used effectively in decision making processes of urban development project by comparing watershed runoff and pollutant reduction by designs of sort of LID technique, LID volume and location.

      • KCI등재

        재처리수 관개후 지표미생물의 농도변화 조사

        정광욱,윤춘경,장재호,김형철,전지홍,Jung Kwang-Wook,Yoon Chun-Gyeong,Jang Jae-Ho,Kim Hyung-Chul,Jeon Ji-Hong 한국농공학회 2005 한국농공학회논문집 Vol.47 No.4

        A study was performed to examine the effects of reclaimed-water irrigation on microorganism con-centration in ponded-water of paddy rice plots. Several treatments were used and each one was triplicated to evaluate the change of indicator microorganisms (total coliforms (TC), fecal coliforms FC), and E. coli) concentrations in 2003 and 2004 growing seasons. Their concentrations increased significantly right after irrigation, but decreased about $45\%$ in 24 hours. It implies that agricultural activities such as plowing and fertilizing should be practiced one or two days after irrigation considering health-risks. Treatments with UV-disinfected water irrigation demonstrated significantly lower concentrations than others including control plots where natural surface water was irrigated. The monitoring results from actual paddy rice fields and experimental paddy plots showed that concentrations of indicator microorganisms ranged from $10^2\;to\;10^5$ MPN/100mL. A comprehensive assessment of existing agricultural practices and a thorough monitoring in the field as well as treatment-plots are recommended to make more realistic national guidelines more applicable. UV-disinfected water irrigation reduced microorganism concentrations in paddy fields down to below the concentration of conventional paddy rice culture, and is thought to be an effective and feasible measure fur agricultural reuse of secondary effluent.

      • KCI등재

        BASINS/HSPF를 이용한 화성유역 오염부하량의 정량적 평가

        정광욱,윤춘경,장재호,김형철,Jung, Kwang-Wook,Yoon, Chun-G.,Jang, Jae-Ho,Kim, Hyung-Chul 한국농공학회 2007 한국농공학회논문집 Vol.49 No.2

        A mathematical modeling program called Hydrological Simulation Program-FORTRAN (HSPF) developed by the United States Environmental Protection Agency (EPA) was applied to Hwaseong watershed. It was run under BASINS (Better Assessment Science for Integrating Point and Nonpoint Sources) program, and the model was validated using monitoring data of $2002{\sim}2005$. The model efficiency of runoff ranged from good to fair in comparison between simulated and observed data, while it was from very good to poor in the water quality parameters. But its reliability and performance were within the expectation considering complexity of the watershed and pollutant sources. The nonpoint source (NPS) loading for T-N and T-P during the monsoon rainy season (June to September) was about 80% of total NPS loading, and runoff volume was also in a similar range. However, NPS loading for BOD ($55{\sim}60%$) didn't depend on rainfall because BOD was mostly discharged from point source (more than 70%). And water quality was not necessarily high during the rainy season, and showed a decreasing trend with increasing water flow. BASINS/HSPF was applied to the Hwaseong watershed successfully without difficulty, and it was found that the model could be used conveniently to assess watershed characteristics and to estimate pollutant loading including point and nonpoint sources in watershed scale.

      • KCI등재

        화옹호 유입하천의 수질현황 및 수질항목간의 상관관계

        정광욱,윤춘경,장재호,전지홍,Jung Kwang-Wook,Yoon Chun-Gyeong,Jang Jae-Ho,Jeon Ji-Hong 한국농공학회 2006 한국농공학회논문집 Vol.48 No.1

        Most projects of tideland reclamation with dike construction produce estuarine reservoirs, which may result in water quality problems due to blocking of natural flow of stream water to the sea. External loadings to the reservoirs through tributaries are major concerns in a concerned water quality management. The water quality of a reservoir is greatly influenced by watershed drainage, and accurate estimation of pollutant is indispensable for in the reservoir management. Concentrations of the microorganisms in stream water and conventional parameters were monitored in the 13 water quality monitoring sites located in a rural watershed of Hwaong estuarine reservoir. The indicator of microorganisms showed strong correlation between them, and regression equations with $R^2\geq0.70$ may be used fur estimating one from other microorganisms. The relationships between water quality parameters obtained in this study may be used to infer one unknown pollutant concentrations from the measured pollutant loadings. This methodology could be applied to other areas where the watershed characteristics are not significantly different from the study area. High concentrations of nitrogen was observed in water quality monitoring sites affected by urban land uses and numbers of livestock in wet day as well as dry day, due to the influent of diffuse sources.

      • EFDC를 이용한 수리 및 수질모델링

        정광욱 ( Kwang-wook Jung ),윤춘경 ( Chun-gyeong Yoon ),이승재 ( Seung-jae Lee ) 한국농공학회 2010 한국농공학회 학술대회초록집 Vol.2010 No.-

        EFDC(Environmental Fluid Dynamics Code)는 연안, 하구, 호소, 습지, 저수지 등의 유동 및 물질수송을 모의하는 3차원 수치모델로서 미국 VIMS(Virginia Institute of Marine Science)에서 개발되었으며, 미국 환경청의 공인 모델로 지정되어 있다. EFDC는 크게 유동, 퇴적물이동, 수질의 세 요소로 구성되어 있으며, 유동모델 부분은 수온과 염분이 함께 고려된 3차원 천수방정식을 기본으로 한다. 기본적인 물리적 구조는 POM 모델(Blumberg and Mellor, 1987), 미국 육군공병단(US Army Corps of Engineers)의 CH3D-WES 모델 및 TRIM 모델(Casulli and Cheng, 1992)과 유사하나, EFDC는 습지에서의 유동현상을 고려하기 위하여 식물군락에 의한 저항(Hamrick and Moustafa, 1996), 파랑의 영향(Hamrick and Zarillo, 1995) 등도 고려할 수 있다. EFDC 모델은 현재까지 수많은 수역의 연구에 적용되어 왔다. 대표적인 수력학적 연구로는 미국 버지니아의 James and York Rivers에서 담수 유입으로 인한 희석 효과, shellfish larvae 이동에 관한 연구(Hamrick, 1992, 1994a; Hamrick and woo, 1997), 미국 플로리다 Indian Lagoon and Sebastian River에서 염수 침입에 대한 연구, 미국 Everglades에서의 대규모 습지 모의에 관한 연구(Hamrick, 1994), 미국 플로리다Okeechobee 호에서 수온 모의에 관한 연구(Hamrick, 1996), 대만 NanWan 만에 대한 적용, 미국 Potomac River에 대한 적용, 한국 시화호 및 경기만에 대한 적용 등이 있다. 수질 부분은 미국 뉴욕 Peconic만, 미국델라웨어와 펜실베니아의 Christian River Basin, 한국 광양만, 시화호, 새만금 해역 등에 적용된 바 있다. 연안 및 하구에서 퇴적물 이동 부분은 미국 플로리다 Vero Beach(Zarillo and Surak, 1995), 미국 캘리포니아Morro만, 미국 메사스세츄 Blackstone River, 미국 워싱톤 Elliott만과 Duwamish River, 한국 광양만, 시화호, 경기만 등에 적용된 바 있다. 퇴적물이동 부분은 DiToro and Fitzpatrick(1993)에 의하여 개발된 CE-QUAL- ICM의 퇴적물 부분을 기본으로 하고 있으며, 점착성과 비점착성의 다양한 크기를 가진 입자를 고려할 수 있다. 또한 농도와 유속 경사에 의한 침강속도, 퇴적물 조성과 저면전단응력에 의한 재부유 등을 고려할 수 있다. 본 연구에서는 해양유동 및 수질해석, 부영양화 해석, 부유사 확산등의 EFDC모델의 활용방안에 대해 연구하였다.

      • BASINS/HSPF 및 WASP5를 이용한 화옹유역과 담수호의 적용성 검토

        정광욱 ( Jung Kwang-wook ),윤춘경 ( Yoon Chun-gyeong ),장재호 ( Jang Jae-ho ),한정윤 ( Han Jung-yoon ) 한국농공학회 2005 한국농공학회 학술대회초록집 Vol.2005 No.-

        Large scale projects of sea-land reclamation have been practiced mainly to enlarge farmland in Korea. Most projects produced estuarine reservoir with dike construction, which might result in water quality problems due to block of natural flowing of stream water to the sea. Applicability of a widely accepted watershed-based water quality assessment tool (BASINS) and its associated watershed model was evaluated on the Hwaong watershed in Korea. BASINS was found to be a convenient and powerful tool for assessment of watershed characteristics, and provided various tools to delineate the watershed into land segments and river reaches, reclassify land use, and parameterize for HSPF simulation. WASP5 is a general purpose modeling system for assessing the fate and transport of conventional and toxic pollutants in surface water bodies. This study involved selection and linkage of available models to be used as a tool in evaluating the effects of BMPs for control on reservoir water quality. Overall,.Linkage of BASINS/HSPF and WASP5 was applicable and found to be a powerful tool in pollutant loading estimation from the watershed and reservoir, and its use is recommended.

      • KCI등재
      • KCI등재

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