• Journal of Korea Water Resources Association
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• v.55 no.7
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• pp.505-513
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• 2022

Recently, uncertainty in predicting available water resources is gradually increasing due to climate change and extreme weather conditions. Social interest in water management such as flood and drought prevention is also increasing, and after the unification of water management implemented in 2018, domestic water management is facing a major turning point. As part of such strengthening of water management capabilities, various studies are being conducted to utilize a hydropower dam for flood control and water supply purposes, which was mainly operated for hydroelectric power generation. However, since the dam evaluation methods developed based on a multi-purpose dam are being applied to hydropower dams, an additional evaluation approach that can consider the characteristics of hydropower dams is required. In this study, a new water supply capacity evaluation method is presented in consideration of the operational characteristics of hydropower dams in terms of water supply, and a connected reservoir simulation method is proposed to evaluate the comprehensive water supply capacity of a dam group operating in a river basin. The presented method was applied to the hydropower dams located in the Bukhan River basin, and the results of the water supply yield of individual dams and multi-reservoir systems were compared and analyzed. In the future, the role of hydropower dams for water supply during drought is expected to become more important, and this study can be used for sustainable domestic water management research using hydropower dams.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.40 no.5
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• pp.477-484
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• 2020

Reservoir operation affects the sustainability of a water supply. However, the increase in the temporal and spatial variability of rainfall, attributed to climate change, has led to severe droughts and increased difficulty in maintaining a sustainable discharge at certain locations in a reservoir system operation. In this study, water yield was evaluated using reservoir simulation with varied water supply. Three reservoir system models were simulated for nine reservoirs in the Han River basin. The time-based reliability, volumetric reliability, and resiliency were used to evaluate the results. Each case was simulated by applying firm supply, deficit supply, and deficit supply with historical power release of the Hwacheon Reservoir. As a result of the simulation, all indexes were increased when the deficit supply was applied. In particular, the time-based reliability increased by more than 30%, and the supply reliability increased by about 4%. The result showed that the water supply of the entire water system could be increased when all reservoirs in the water system were operated to supply water and maintain sustainable discharge at the same downstream point. The deficit supply was an efficient reservoir operation method for responding to climate change, especially increased rainfall variability.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.2
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• pp.507-519
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• 2013

This study is to evaluate agricultural water supply capacity in Geum river basin (9,865 $km^2$), one of the 5 big river basin of South Korea using MODSIM-DSS (MODified SIMyld-Decision Support System) model. The model is a generalized river basin decision support system and network flow model developed at Colorado State University designed specifically to meet the growing demands and pressures on river basin management. The model was established by dividing the basin into 14 subbasins and the irrigation facilities viz. agricultural reservoirs, pumping stations, diversions, culverts and groundwater wells were grouped and networked within each subbasin and networked between subbasins including municipal and industrial water supplies. To prepare the inflows to agricultural reservoirs and multipurpose dams, the Soil and Water Assessment Tool (SWAT) was calibrated using 6 years (2005-2010) observed dam inflow and storage data. By MODSIM run for 8 years from 2004 to 2011, the agricultural water shortage had occurred during the drought years of 2006, 2008, and 2009. The agricultural water shortage could be calculated as 282 $10^6m^3$, 286 $10^6m^3$, and 329 $10^6m^3$ respectively.

• Korea Petroleum Association Journal
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• no.3 s.157
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• pp.59-64
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• 1994

국내 LPG 가격제도는 장기적으로 LPG 수입기지의 추가 건설로 공급능력을 확충하여 공급의 경쟁성을 확보한후 LPG 가격을 연동제 또는 자유화할 계획이다.

• Nuclear industry
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• v.15 no.2 s.144
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• pp.15-21
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• 1995

값싸고 질좋은 전력의 안정적 공급노력은 지속적으로 추진되었으며, 계획예방정비기간의 조정, 정비기간의 단축 등 공급능력 증대와 고장정지 예방을 위한 다각적인 노력과 중국 광동원전 기술인력 지원 등 1994년은 원전기술 수출의 원년의 해로 원전기술을 세계적 수준으로 올리는데 성공적인 한해였다고 판단된다.

• Journal of the Korean Society for information Management
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• v.24 no.3
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• pp.21-41
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• 2007

IT outsourcing has become a critical component of organizations, but improper expectations, ambiguous contracts and unclear goals frequently cause the failure of IT outsourcing. Especially we have to be concerned about the uncareful management of customer-supplier relationships based on a psychological contract perspective. This study focuses on the obligations of contractual parties for IT outsourcing which influence the outsourcing relationship(OR) and the successful performance of IT outsourcing(OP). The supplier obligations consist of the achievable infrastructure(S1) and capability(S2), and the customer obligations is composed of the acceptable environment(C1) and acceptability(C2) for IT outsourcing. This paper shows that the S1, S2, and C2 have an effect on the OR, the OR on the OP, and the S2 also on the OP directly. The four components of customer-supplier obligations are mutually related to each other. What is more, we must notice that the S2 has strong connections with the C2.

• Journal of KIISE:Computing Practices and Letters
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• v.14 no.9
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• pp.823-834
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• 2008

Recently, interests for SRM have been increasing rapidly to automate the whole processes of supply chain from sourcing to procurement and improve the whole efficiency of supply chain by strategically managing the relationship with external partners (suppliers). The national procurement service of Korea is trying to build new paradigms by introducing SRM for improving the competitiveness of national public procurement service. For this, a new assessment model for evaluating and selecting suppliers with fairness and objectivity should be developed. In this paper, we propose a new SRM solution including a model that evaluates and grades of suppliers' capabilities of performing the contracts. We also explain the innovation of national public procurement system through this SRM solution.

• Journal of Korea Water Resources Association
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• v.39 no.3 s.164
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• pp.199-214
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• 2006

The efficient management strategies of reservoirs in periods of drought event are an essential element for drought planning. A Water Supply Capacity Index (WSCI) has been developed for the evaluation and effective monitoring of the supply capacity of a reservoir during a drought event. The WSCI is a measure of the duration that a reservoir can supply a required demand under the worst drought condition. The WSCI is not only a useful standard to refer to when making decisions on reservoir operations in a period of drought, but it can be also applied for setting the drought trigger in water demand sites supplied from the reservoir. The correlation between the standardized WSCI and existing drought indices such as PDSI, SPI and SWSI has been analyzed to the applicability of WSCI.

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.361-361
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• 2020

우리나라의 경우 강수량이 지역별로 편중되면서 국지적 가뭄이 발생하고, 지형적 특성으로 상습가뭄지역 피해가 확대되고 있다. 더불어 강수의 시기별 편차가 커지면서 봄 가뭄 증가 및 장기 기후변화 시나리오도 가뭄 발생 가능성 증가를 전망하고 있다. 그러나 우리나라의 경우 가뭄대응 대책 마련시 선제적인 가뭄대응 대책 마련보다, 사후복구·단기대책을 중심으로 가뭄대응능력을 추진하고 있어 예방중심의 가뭄대응능력의 한계점을 지니고 있다. 본 연구에서는 선제적 예방 중심의 가뭄대응 전략을 위해 물순환 모델을 기반으로 수원별 가뭄대응능력을 평가하고, 지역별로 산정된 용수공급가능일수를 기반으로 수문학적 가뭄취약지도를 작성하는 것을 목적으로 한다. 이때 용수공급가능일수는 가뭄시나리오(20년, 30년, 50년 등)를 설정하여 시나리오별 공급가능일수를 평가하여 시공간적 가뭄취약성 분석이 가능한 모형으로 확장하였다. 수문학적 가뭄취약지도의 경우 정책결정자, 업무사용자 등 효율적 정보 제공이 가능할 것으로 판단되며, 지역별로 현안사항 도출 및 개선방안을 위한 기초자료로 활용 될 수 있을 것으로 기대된다.

• Nuclear industry
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• v.17 no.6 s.172
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• pp.25-29
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• 1997