• 한국신재생에너지학회:학술대회논문집
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• 2011.05a
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• pp.208.2-208.2
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• 2011

기존의 수력발전방식은 물의 위치에너지를 이용하므로 적합한 입지가 제한된다. 그러나 수류에너지를 이용한 발전방식은 기존의 수력발전과는 달리 물의 운동에너지를 이용하기 때문에 입지에 제한이 적으며, 물은 밀도가 크기 때문에 작은 유속으로도 많은 에너지를 생산할 수 있고,댐을 필요로 하지 않으므로 하천생태계 및 환경에 영향을 주지 않는 장점이 있다. 따라서 하천 뿐 아니라 기존 물관련시설의 미활용 방류수를 이용할 수 있으므로 수력잠재량이 매우 크다. 본 연구에서는 다목적댐 방수로의 수류에너지 잠재량 산정을 위하여 유역면적이 $2,285km^2$ 이고 연평균 방류량이 약 $29,389m^3/s$ 인 남강댐을 선정하였다. 분석결과 남강 다목적댐의 방수로를 이용한 수류에너지 잠재량은 연간 약 639,685.35kWh로 산정되었다. 향후 하천생태계와 환경에 영향을 주지않는 재생에너지원으로서의 수류에너지 이용은 미활용에너지의 적극 활용 측면과 미래전력 수요에 대한 중요한 원천으로써 재고되어야 할 것이다.

• Magazine of the Korea Concrete Institute
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• v.27 no.1
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• pp.53-56
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• 2015

• Proceedings of the Korea Water Resources Association Conference
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• 2001.05a
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• pp.164-169
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• 2001

• Journal of Korea Water Resources Association
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• v.30 no.6
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• pp.709-720
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• 1997

When flood control storage lacks for the reservoir operation of multipurpose dams during flood period, the additional flood control storage should be considered for the flexible use of limited storage capacity. Flood period is divided by meteorological characteristics in this study and the water levels for water demand and flood control are investigated for the divided flood period. Based on the investigations, we suggest the variable restricted water level(VRWL) from the considerations of water conservation and flood control which can determine dam operating water level during flood period. This paper presents an application of the methodology to determination of the VRWL during flood period at the Taechong Dam and the results are discussed.

• Journal of Korea Water Resources Association
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• v.38 no.3 s.152
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• pp.179-188
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• 2005

This study on the HwaBuk Multipurpose Dam showed that two- and three- dimensional numerical model experiments, as well as hydraulic model experiments, can be useful analysis tools for engineers. A commercially available RMA2, which solves the shallow water equations, and FLOW-3D, which solves the Reynolds averaged Navier-Stokes equations, were used to simulate the hydraulic model setup. Numerical simulation results on the following were compared with the hydraulic model results: the flow in the reservoir basin and the approaching channel; the discharge in the overflow weir; the water surface profiles in the rollway, chute, and stilling basin; and the pressure distributions in the rollway. It was shown that there is a reasonably good agreement between the numerical model and the hydraulic model for the most of computations. There were, however, some differences between the numerical simulation results and hydraulic model results for the hydraulic jump in the stilling basin because of air entrainment effect.

• Korean Journal of Construction Engineering and Management
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• v.8 no.3
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• pp.168-176
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• 2007

This study aims to provide useful information when making a decision for the environmental and economic efficiency assessment of infrastructure, based on Life Cycle Assessment(LCA). It estimates environmental cost on environmental pollutants that are possible to happen by locations and by types of emergency spillway for korean multipurpose dam, which is selected as a study case. For this purpose, this study examines the theories of LCA and Contingent Valuation Method(CVM) and suggests an analysis model of environmental cost. To apply the suggested analysis model of environmental cost for infrastructure to the case study of emergency spillway at the multipurpose dam, this study calculates environmental load on environmental pollutants that generate during life cycle, converts it to a cost to predict environmental cost, evaluates environmental economy of emergency spillway by the estimated result, and draws the optimum alternative that is environmental-friendly and economic.

• Journal of Industrial Technology
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• v.18
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• pp.443-452
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• 1998

The future water quality of Youngwol Dam was predicted using FEMWASP. In the this study, point and non-point source in the basin was investigated in detail, and future pollutant loading was computed by various prediction technique. The water quality of 29 sites was analyzed over four seasons. FEMWASP was used to predict future water quality of Youngwol lake and downstream of proposed dam. Future water quality of Youngwol lake was predicted to configure eutrophication status, management criteria was suggested to minimize the pollution problems coming from future eutrophication. Discharge rate of dam was decided as 30CMS to conserve the water quality, and overall design of dam was changed.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.3
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• pp.549-559
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• 2017

The complementary relationship hypothesis for areal evapotranspirations was validated in the regional-scale area of multipurpose dam basins in Korea and the long-term water balances were indirectly identified. Annual actual evapotranspiration ($ET_A$) was assumed the difference between total annual precipitation and total annual inflow and the available moisture was assumed the total precipitation. The seasonally varying pan coefficient (kp) is estimated as the ratio of the $ET_{pan}$ and the evapotranspiration calculated by FAO Penman-Monteith equation ($ET_{PM}$). The complementary relationships using ground observation data of $ET_P$ and $ET_A$ in the multipurpose dam basins follow generally the typical pattern that $ET_P$ and $ET_A$ is complementary and converges to equivalent evapotranspiration ($ET_W$) under the extreme wet environment. However, $ET_A$ of Juam dam was estimated relatively greater than other basins and exceeds even $ET_P$ at certain range with high moisture availability, which can be understood as the results of possible over-estimation of precipitation or under-estimation of dam inflow. It is expected that the use of evapotranspiration complementary relationship for validating hydrological water balances will contribute to controlling uncertainties in estimating dam inflows during flood season in particular.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.35 no.5
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• pp.1039-1049
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• 2015

The inflow estimation at large multipurpose dam reservoir is carried out by considering the water balance among the discharge, the storage change during unit time interval obtained from the observed water level near dam structure and area-volume curve. This method can be ideal for level pool reservoir but include potential errors when the inflow is influenced by the water level slope due to backwater effects from upstream flood inflows and strong wind induced by typhoon. In addition, the other uncertainties arisen from the storage reduction due to sedimentation after the dam construction and water level noise due to mechanical vibration transmitted from the electric power generator. These uncertainties impedes the accurate hydraulic inflow measurement requiring exquisite hydrometric data arrangement for reservoir waterbody. In this study, the distributed hydrologic model using UBC-3P boundary setting was applied and its feasibility was evaluated. Finally, the modeling performance has been verified since the calculated determination coefficient has been in between 0.96 to 0.99 after comparing with observed peak inflow and total inflow at Namgang dam reservoir.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.503-506
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• 2003

The DAWAST model was originally developed to consider daily variation in the unsaturated soil water storage and it is a conceptual lumped model. Return flows from agricultural, domestic and industrial water were included to the original result of model simulation to calibrate model parameter. Daily inflow to the Daechung multipurpose dam was applied to verify the DAWAST model considered return flows. Simulation results were comparable to the inflows of dam operation reasonably.