• Journal of Navigation and Port Research
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• v.31 no.10
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• pp.819-824
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• 2007

This paper studied safety benefit of operation-effectiveness analysis on marine traffic safety facilities. In the operation-effectiveness of marine traffic safety facilities the benefits can be divided as safety benefit, transport benefit, and other benefit. Safety benefit was produced as the loss aversion cost of marine traffic caused by the reduction of marine accidents after establishing and operating marine traffic safety facilities. First of all the reduction rate marine accidents was estimated to do it, and the detail model of loss aversion cost was constructed Then each variable in the model was defined and the method of computation presented.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1977-1981
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• 2007

K-WEAP(Korea-Water Evaluation And Planning System)은 한국건설기술연구원과 SEI-US(Stockholm Environment Institute-US Center)가 공동으로 개발하고 있는 통합수자원평가계획모형으로서, 대부분의 기능은 기존의 SEI-US가 개발한 WEAP(Water Evaluation And Planning System)에 기반을 두고 있지만, 국내 실정에 맞도록 수정 보완한 후, 단계적으로 그 기능을 개선해 나가고 있어 향후 수자원계획을 위한 종합적인 도구로서 활용이 기대된다. 현재까지 K-WEAP의 2단계 기능개선 작업을 수행하였다. 주요 개선기능으로는 물수지모형의 개선과 하천수질모형의 개선, 편익산정모형의 개발 등이 있으며, 최근 보다 정확하고 다양한 오염원에 대한 하천수질 모의를 위해 Qual2K와의 연계시스템을 개발하여 수량과 수질을 동시에 모의할 수 있게 하였다. 현재까지 개선된 기능으로는 물수지모형의 개선으로써 수요처 최소수질기준 설정기능을 개발하여 수질이 낮은 수원에서는 물을 공급받을 수 없는 상황을 물수지 분석시 적용할 수 있게 하였다. 하천수질모형의 개선부분에서는 분할 오염부하량 산정기능을 개선하여 수요처 오염부하량 산정시 사회경제지표와 오염원단위를 곱하여 발생량을 계산하는 방법과 직접 수요처 회귀수의 각 오염성분 농도를 입력하는 방법을 추가하였으며 K-WEAP과 Qual2K와의 연계시스템을 개발하여 보다 정확하고 다양한 오염원에 대한 하천수질모의를 가능케 하였다. 또한 모의된 수질결과와 관측치를 비교하기 위해 수질모의결과 검정기능도 추가하였다. 수자원계획 및 평가에 있어서의 편익산정을 하기 위해 경제성분석 모형도 추가하였으며, 사용자 인터페이스 부분에서는 시나리오간 결과를 비교할 수 있는 기능과 지역관리 기능을 개선함으로써 사용자가 보다 편리한 환경에서 수자원계획과 평가를 수행할 수 있게 하였다. 개선된 기능을 통해 보다 정확한 수량-수질 연계 모의가 가능해졌으며 사용자들은 보다 쉽고 정확하게 모의결과를 평가 할 수 있을 것으로 기대된다.

• Journal of Korea Water Resources Association
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• v.55 no.6
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• pp.405-419
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• 2022

Flood frequency analysis commonly used to design the hydraulic structures to minimize flood damage includes uncertainty. Therefore, the most appropriate design flood within a uncertainty should be selected in the final stage of a hydraulic structure, but related studies were rarely carried out. The total expected cost function introduced into the flood frequency analysis is a new approach for determining the optimal design flood. This procedure has been used as UNCODE (UNcertainty COmpliant DEsign), but the application has not yet been introduced in South Korea. This study introduced the mathematical procedure of UNCODE and calculated the optimal design flood using the annual maximum inflow of hydroelectric dams located in the Bukhan River system and results were compared with that of the existing flood frequency. The parameter uncertainty was considered in the total expected cost function using the Gumbel and the GEV distribution, and the Metropolis-Hastings algorithm was used to sample the parameters. In this study, cost function and damage function were assumed to be a first-order linear function. It was found that the medians of the optimal design flood for 4 Hydroelectric dams, 2 probability distributions, and 2 return periods were calculated to be somewhat larger than the design flood by the existing flood frequency analysis. In the future, it is needed to develop the practical approximated procedure to UNCODE.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.6D
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• pp.871-879
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• 2008

Recently, as there are a rise in the standard of living and higher concerns of an electromagnetic wave and environment, undergrounding the aerial cables which are supported by large pylons and generally considered as the least attractive feature of an urban area is on an increasing trend to improve aesthetic benefits and electric reliability. This study applied Contingent Valuation Method (CVM) which is expected to become an effective tool to measure indirect benefit to estimate the substantial benefits of undergrounding overhead power line projects in an urban area. The tunneling construction project of the 345kV Shinsungnam electric power cable in Seongnam city was selected and a hypothetical scenario was given to respondents to determine their levels of Willingness to Pay (WTP) for undergrounding overhead power lines. The result from the estimation of the WTP of undergrounding overhead power lines in Seongnam city was calculated as approximately 17.1 billion won. Placing existing overhead lines underground is difficult to justify economically. Most undergrounding costs appear to be justified by aesthetic and public policy considerations. Therefore, considering the result of this study, undergrounding overhead power lines is of great benefit to public.

• Economic and Environmental Geology
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• v.39 no.6 s.181
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• pp.787-801
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• 2006

Focused in the characteristic of R&D on Geoscience and Mineral Resources as basic research area, we survey on methods of public works' economic impact analysis including cost-benefit analysis and resent technology evaluation methods and suggest apply-methods to conduct economic impact analysis on R&D of geoscience and mineral resources. To conduct economic impact analysis on the basic research area, it need to identification research's out-come not just output. In this perspective, we propose a method, Input-Output-Outcome Roadmapping to identify the outcome of R&D and show the relation of input, output, and outcome of R&D. Furthermore, noticing the different effects of R&D from public works, we directly evaluate the use-value of the academic theory or geological maps through Contingent Valuation Method(CVM) and others developed as evaluation methods on environmental goods. In indirect application methods, it can evaluate the partial of the pubic works' benefit with assuming R&D factors if R&D is a part of public works. If not, we evaluate the R&D's value as reductions of costs or additions of benefit with finding related public works.

• Journal of Korean Society of Transportation
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• v.30 no.1
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• pp.135-147
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• 2012

The benefit of traffic information on variable message sign can be divided into two. At the public level, the benefit of ATIS is the travel time saving, which is not only induced from ATIS, but also mixed with that of ATMS. In the economic appraisal of ITS, the benefit of ATIS has so far been regarded as the derived benefit from ATMS. At the user level, the benefit of ATIS is reduced driver uncertainty through the forward traffic status information. User can benefit from the information on VMS and therefore may have the willingness to pay for it. Recently attempt to qualify the value of information on VMS was increased, but there was a danger of distorting or over-estimates of the ATIS benefit because the related studies didn't consider the time-dependent attributes of traffic information and provided the single value. Estimates of the time-varying value should be needed for a rigorous economic appraisal of ATIS. In this study, we varied the value of information on VMS according to peak and non peak trip and verified the hypothesis that time-varying of value was statistically significant.

• Proceedings of the KIEE Conference
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• 2008.11a
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• pp.444-446
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• 2008

논문에서는 전력시장 및 계통의 운영에 따라서 발생될 수 있는 시장참여자들의 편익을 정의하고 최적조류재산(OPF)을 이용하여 편익을 산정할 수 있는 방법을 제시하였으며, 이를 이용하여 송전선 투자에 따른 효과를 분석하고, 도매전력시장의 구조에 따른 투자효과를 비교분석 하였다.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.217-220
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• 2011

본 연구에서는 경상북도 북부지역의 5개의 소수력발전 후보지점을 설정하였으며, 5개 후보지점에 대하여 설치가능한 소수력 발전시설은 지형학적 측면을 비롯하여 다양한 타당성 검토를 통하여 댐식 소수력 발전시설이 타당한 것으로 분석되었다. 5개 후보지점에서 설정된 유량지속곡선을 이용하여 발전용량을 산정하고 수차를 선정하였다. 따라서 산정된 발전 용량을 편익비용 분석법과 내부수익률 분석법을 이용하여 경제성분석을 실시하였다. 본 연구에서는 3개의 소수력발전 후보지점(경상북도 봉화군 명호면, 경상북도 영주시 문수면 권선리, 경상북도 예천군 형호리)이 B/C 비율이 1이상으로 경제성이 있는 것으로 분석되었으나, 설비용량 500kW 이상인 최적 개발후보지는 경상북도 영양군 입암면 후보지점인 것으로 나타났다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.4B
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• pp.363-369
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• 2006

A simple and an improved methods for the economic analysis of the flood control project has been in previous studies in Korea. In 2004, the Multi-Dimensional Flood Damage Analysis (MD-FDA) was developed and now it is widely used for the economic analysis of flood control project. However, the MD-FDA was developed for general damage assessment and analysis without consideration of specific regional characteristics such as urban and rural areas. To compensate the MD-FDA for the application in urban area, a part of damage estimation components is modified and a component for the flood damage estimation is suggested. The component we suggest is for the consideration of the capability of stormwater pump stations in the study area. When flood is occurred in the urban area, the damage potential is larger than the rural area because of the concentration of human lives and properties. So, many stormwater pump stations are located in the urban area and the inundation depth is estimated by considering the capabilities of pump stations. We also compensate the damage components such as the damages of industrial area, and public facilities for the flood damage estimation of the urban area. The results by the compensated MD-FDA for the urban area application with those by original MD-FDA are compared. As a result the B/C ratio showed 6.75 and 5.51 respectively for the modified and original MD-FDA. This difference might be largely affected by the damage rate of the public facilities.

• Journal of the Korean Association of Geographic Information Studies
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• v.2 no.2
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• pp.87-96
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• 1999

Using the case of Taegu city, this study analyses benefits and costs related to the construction of GIS to local government. For this purpose, the study uses a case study selecting Taegu Metropolitan city. In this study, four discount rates(5%, 8%, 10%, 12%) are used for sensitivity analyses. According to this benefit-cost analysis, Taegu city government could get positive net present benefits from the year of 2004 which is 6 years after its GIS construction. This a result, Provides the economical and financial validity of GIS Construition in local government. In this study, analysis of invisible benefits are excluded. If these invisible and potential benefits are included in the analysis, GIS could produce more net benefits and the even break point of GIS construction in local governments will come earlier. For the further study, the study needs to develop new benefits and utilize cost-effectiveness analysis to catch these invisible benefits.