• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.91-91
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• 2017

전 세계적으로 인공습지는 도시화, 기후변화 및 생활수준 향상으로 인한 홍수와 가뭄, 하천생태계 변화, 수질오염과 같은 환경문제의 해결방안으로 제시되고 있다. 이에 따라 국내에서도 여러 목적과 형태의 인공습지가 조성되고 있다. 인공습지의 경우 특정 기능을 목적으로 하여 조성하더라도 인공적 생태계가 조성되므로 복합적 기능을 갖게 된다. 하지만 현재까지의 인공습지 조성 효과에 관한 연구는 한가지 기능에만 초점을 맞추어서 실제 인공습지 조성의 가치가 저평가되고 있다. 본 연구에서는 하천변 인공습지 조성에 따른 여러 효과 중 가장 주가 되는 홍수저감 및 수질개선 기능에 대한 효과를 분석하고 이에 따른 편익을 산정하였다. 먼저 인공습지의 적용 대상 유역을 선정하고 유역 내에 입지를 결정하여 이에 맞는 인공습지를 설계 및 적용하였다. 인공습지 조성에 따른 홍수저감 효과 및 수질개선효과를 각각 분석하였다. 분석 결과에 대해 MD-FDA를 통해 홍수피해액을 산정하였고 대체비용법을 통하여 동일한 수질개선 효과를 갖는 하수처리시설의 하수처리비 및 운영관리비에 해당하는 수질개선 편익을 산정하였다. 본 연구를 통해 인공습지의 홍수저감 효과뿐만 아니라 수질개선 효과를 확인하였으며 정량적인 분석방법을 통해 두 가지 기능에 대한 효과를 분석하여 보았다. 또한 산정된 홍수저감 및 수질개선 효과를 경제적 가치로 환산하여 보다 객관적인 지표로 나타내었다. 본 인공습지 조성에 따른 종합적 편익 산정 연구 결과는 다목적의 인공습지를 적재적소에 적용하는데 기여할 것이다. 추후 생태적 기능, 레크레이션 기능 등에 따른 기타 편익 산정 방법론 조사를 통해 각 기능의 편익을 추가한다면 인공습지 조성에 따른 편익을 종합적으로 고려할 수 있을 것으로 판단된다. 또한 인공습지 조성의 소요사업비 및 유지관리비를 산정하여 인공습지 조성에 대한 경제성분석을 한다면, 실제 인공습지 조성 사업 시 사업의 타당성을 평가하는 기초자료로 활용할 수 있을 것으로 기대된다.

• Korean Journal of Construction Engineering and Management
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• v.17 no.4
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• pp.103-115
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• 2016

The 106 buildings of 200 meters' height or greater were completed around the world in 2015 (CTBUH, The Council on Tall Buildings and Urban Habitat). They beat every previous year on record, including the previous record high of 99 completions in 2014. This brings the total number of 200-meter-plus buildings in the world to 1,040, exceeding 1,000 for the first time in history and marking a 392% increase from the year 2000, when only 265 existed. South Korea recorded three completions during 2015 - improving slightly over 2014, in which it had one. This study focused on the fact that high-rise building development project risks have not reduced in Korea in spite of numerous studies and measures. And it attempted to examine whether existing studies and measures have been presented on the basis of the accurate analysis of existing studies and measures and classify and analyze the characteristics of each phase' s risk factors in the hope that its results would be one reference point as to the measure to prevent high-rise building development project risks in the future. A high-rise building development project is the high risk project as compared with the low-rise project. Because a high-rise development project takes long and is very sensitive to the changing environment. Therefore, in order to succeed the project it becomes necessary to effectively manage the risk involved in the process of the high-rise building development project. The result of this study can be used as the guideline to make the risk management system for the high-rise development project.

• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.4
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• pp.354-361
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• 2016

While the amounts of oil spill caused by the VLCC Hebei Spirit indicated 2.5 times more than that of the VLCC Sea Prince, the economic, environmental, and social damages derived from the Hebei Spirit spill were estimated to be about 30 times greater than those from the Sea Prince incident. This study consolidates the appropriate justification for building a multi-purpose large oil spill response vessel to allow swift and efficient handling of catastrophic marine pollution events through an analysis of technical and economic feasibility of such a project. The result of the technical feasibility analysis illustrates that a hopper dredge and oil spill response vessel with a capacity of 4,000 tons should be more appropriate. The result of the economic feasibility analysis indicates that under the most conservative estimates the project appears to be slightly impractical, with a benefit/cost ratio of 0.82, in which self-help efforts, however, can facilitate the project. And medium to optimistic estimates present benefit/cost ratios are estimated to be 2.72 and 5.82 respectively, representing apparent economic feasibility.

• Korean Journal of Construction Engineering and Management
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• v.25 no.3
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• pp.3-16
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• 2024

The government announced the Housing Welfare Roadmap (November 2017), to expand the supply of public rental housing by reconstructing aged long-term public rental complexes. Also, remodeling projects for complexes with low business feasibility of reconstruction projects are recognized as an alternative to supplying public rental housing in urban area. This study analyzed influence factors by dividing them into project feasibility, architectural plan, urban & residential environment plan, and legal system groups in order to establish a plan for long-term public rental housing remodeling project. Futhermore, this work conducted the principal component analysis to get the principal component factors among the influence factors of each group, and the weight analysis to calculate weighting of them. In addition, major influence factors were derived by calculating the relative importance score (RIS) of each factor. Lastly this paper validated the major influence factors and applicability of the procedure to select 3 complexes that can be reviewed for remolding project among 33 long-term public rental housing complexes located in Seoul. The results of this study are expected to be useful when establishing a remodeling project plan for long-term public rental housing.

• Korean Journal of Construction Engineering and Management
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• v.6 no.6 s.28
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• pp.133-141
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• 2005

In the resent years, the importance of VE (value engineering) and LCC (life cycle cost) analysis for apartment building construction projects has been fully recognized. Accordingly theoretical models, guidelines, and supporting software systems were developed for the value engineering and life cycle cost analysis for construction management including large building systems. However, the level of consensus on VE and LCC analysis results is still low due to the lack of reliable data on maintenance. This paper presents time dependent LCC model based value analysis method for rational investment decision making and design alternative selection for construction of apartment building. The proposed method incorporates a time dependent LCC model and a performance evaluation technique by fuzzy logic theory to properly handle the uncertainties associated with statistics data and to analyze the value of alternatives more rationally. The presented time dependent VE and LCC analysis procedure were applied to a real world project, and this case study is discussed in the paper. The model and the procedure presented in this study can greatly contribute to design value engineering alternative selection, the estimation of the life cycle cost, and the allocation of budget for apartment building construction projects.

• Journal of Intelligence and Information Systems
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• v.23 no.1
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• pp.23-46
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• 2017

Although there have been cases of evaluating the value of specific companies or projects which have centralized on developed countries in North America and Europe from the early 2000s, the system and methodology for estimating the economic value of individual technologies or patents has been activated on and on. Of course, there exist several online systems that qualitatively evaluate the technology's grade or the patent rating of the technology to be evaluated, as in 'KTRS' of the KIBO and 'SMART 3.1' of the Korea Invention Promotion Association. However, a web-based technology valuation system, referred to as 'STAR-Value system' that calculates the quantitative values of the subject technology for various purposes such as business feasibility analysis, investment attraction, tax/litigation, etc., has been officially opened and recently spreading. In this study, we introduce the type of methodology and evaluation model, reference information supporting these theories, and how database associated are utilized, focusing various modules and frameworks embedded in STAR-Value system. In particular, there are six valuation methods, including the discounted cash flow method (DCF), which is a representative one based on the income approach that anticipates future economic income to be valued at present, and the relief-from-royalty method, which calculates the present value of royalties' where we consider the contribution of the subject technology towards the business value created as the royalty rate. We look at how models and related support information (technology life, corporate (business) financial information, discount rate, industrial technology factors, etc.) can be used and linked in a intelligent manner. Based on the classification of information such as International Patent Classification (IPC) or Korea Standard Industry Classification (KSIC) for technology to be evaluated, the STAR-Value system automatically returns meta data such as technology cycle time (TCT), sales growth rate and profitability data of similar company or industry sector, weighted average cost of capital (WACC), indices of industrial technology factors, etc., and apply adjustment factors to them, so that the result of technology value calculation has high reliability and objectivity. Furthermore, if the information on the potential market size of the target technology and the market share of the commercialization subject refers to data-driven information, or if the estimated value range of similar technologies by industry sector is provided from the evaluation cases which are already completed and accumulated in database, the STAR-Value is anticipated that it will enable to present highly accurate value range in real time by intelligently linking various support modules. Including the explanation of the various valuation models and relevant primary variables as presented in this paper, the STAR-Value system intends to utilize more systematically and in a data-driven way by supporting the optimal model selection guideline module, intelligent technology value range reasoning module, and similar company selection based market share prediction module, etc. In addition, the research on the development and intelligence of the web-based STAR-Value system is significant in that it widely spread the web-based system that can be used in the validation and application to practices of the theoretical feasibility of the technology valuation field, and it is expected that it could be utilized in various fields of technology commercialization.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.2117-2121
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• 2008

최근 서울시는 청계천의 유지용수 및 환경개선을 위해 한강물을 이용하였다. 이를 계기로 앞으로 유사한 용도로 물을 사용하려는 지방자치단체의 수요는 크게 증가할 것으로 예상된다. 이렇듯 환경을 개선하기 위한 용수의 수요는 이미 현실적인 문제로 대두되고 있음에도 이에 대한 기술적 분석이나 관련 제도가 잘 정비되지 않은 실정이며, 심지어 그 개념 및 용어의 정의조차 모호한 상황이다. '환경개선용수'는 간단하게는 '하천의 수질환경을 개선하고 하천의 기초 생태계를 보호하는 물'을 의미할 수 있다. 그러나 광의로는 효율적인 하천관리와 환경보전에 대한 국민들의 관심이 증가하면서 친수 공간 확대 등의 생활상의 필요까지도 포괄하는 개념이다. 환경개선용수로 인한 편익이란 수량 확보로 인한 수질 정화, 하천생태계 보전, 하천경관 개선, 유지유량 확보, 사회 생활환경 형성 등의 이득을 말한다. 본 연구의 목적은 일반적인 환경재의 가치평가기법을 조사하여 장단점을 분석하고, 이를 바탕으로 환경개선용수에 의한 하천경관개선편익의 계량화 방향을 제시하는 것이다. 특히 수자원의 환경편익 계량화와 관련한 국내 외 연구를 폭넓게 참고하고자 한다. 전통적인 경제학의 영역에서 환경재는 일반적으로 사치재로 분류할 수 있다. 따라서 국민소득수준의 향상에 따라 환경에 대한 사회적 욕구도 증가할 것이며, 이는 곧 환경개선에 의한 편익이 계속 증대될 것임을 의미한다. 수자원사업의 환경개선용수로 인한 편익의 계량화는 타당성분석의 신뢰성 향상으로 사업의 사회적 수용성을 높이는데 도움이 될 것으로 판단된다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2016.11a
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• pp.223-225
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• 2016

최근 기후변화 및 도시화의 영향으로 홍수와 가뭄과 같은 자연재난이 점점 심화되고 있다. 습지는 유속과 수위를 낮추는 홍수조절 효과가 있으며 가뭄시에는 물을 저장하는 역할을 하여, 인공습지의 조성은 심각해지는 홍수 및 가뭄에 해결방안으로 활용될 수 있다. 기존의 인공습지에 관한 연구는 식생과 수질정화기능과 종 다양성 등 생태적 기능에 관한 연구가 주로 이루어져왔으며, 인공습지의 홍수조절 효과에 관한 연구는 미비한 실정이다. 따라서, 본 연구에서는 경안천 유역에 인공습지 조성에 따른 수문학적 홍수저감효과를 분석하였다. 이를 위해 수리모형인 HEC-RAS를 통하여 가상의 인공습지를 모형화 하여 인공습지 조성 전 후에 대한 홍수위를 비교 분석하였다. 또한 홍수범람을 모의하여 대상유역의 침수심 및 침수면적을 산정하고 이를 다차원홍수피해액산정법을 통하여 인공습지 조성 전 후에 대한 홍수피해액을 추정하였다. 본 연구결과를 바탕으로 인공습지 조성 사업 시 사업의 경제적 타당성을 평가하며, 인공습지 설계의 기초자료로 활용될 수 있을 것으로 기대된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.7
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• pp.3232-3237
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• 2013

This study was carried out to evaluate the economic value of Tyvek planting technique in Korean citrus. The Tyvek planting technique was developed by national institute of horticultural and herbal science in Korea rural development administration. This technology could be used to improve efficiency and practicality of cultivation of citrus. The research results show that the technological value of Tyvek planting technique was evaluated 42,163(discount rate 6%)-55,018(discount rate 8%) million won. IRR is greater than discount rate(6-10%). NPV is greater than zero. B/C ratio IRR is greater than 20. The economic validity of Tyvek planting technique is identified by the results of technology evaluation.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.3B
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• pp.301-310
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• 2006

Typically, we needs enormous national budget for the flood control project and so the project usually has big influence on the national economy. Therefore, the reliable estimation of flood damage is the key issue for the economic analysis of the flood control project. This study aims to provide a GIS based technique for distributed flood damage estimation. We consider two aspects of engineering and economic sides, which are the inundation analysis and MD-FDA (Multi-Dimensional Flood Damage Analysis), for the flood damage assessment. We propose the analysis framework and data processing using GIS for assessing flood damages. The proposed methodology is applied to the flood control channel project for flood disaster prevention in Mokgamcheon/Dorimcheon streams and this study presents the detailed GIS database and the assessment results of flood damages. This study may have the worth in improving practical usability of MD-FDA and also providing research direction for combining economic side with the engineering aspect. Also this distributed technique will help decision-making in evaluating the feasibility of flood damage reduction programs for structural and nonstructural measures.