• 제목/요약/키워드: climate characteristics

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기후변화에 따른 서낙동강 시험유역에서의 수질영향 분석 (Effect of Climate Change on Water Quality in Seonakdong River Experimental Catchment)

  • 강지윤;김정민;김영도;강부식
    • 상하수도학회지
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    • 제27권2호
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    • pp.197-206
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    • 2013
  • Recently, climate change causes climatic anomaly such as global warming, the typhoon and severe rain storm etc. and it brings damage frequently. Climate change and global warming are prevalent all over the world in this century and many researchers including hydrologists have studied on the climate change. In this study, Seonakdong river watershed in the Nakdong river basin was selected as a study area. Real-time monitoring system was used to draw the rating curves, which has 0.78 to 0.96 of $R^2$. To predict runoff change in Seonakdong river watershed caused by climate change, the change in hydrologic runoff were predicted using the watershed model, SWAT. As a result, the runoff from the Seonakdong river watershed was increased by up to 45 % in summer. Because of the non-point sources from the farmland and the urban area, the water quality will be affected by the climate change. In this study, the operating plan of the water gates in Seonakdong river will be suggested by considering the characteristics of the watershed runoff due to the climate change. The optimal watergate opening plan will solve the water pollution problems in the reservoir-like river.

도시기후 평가와 방재를 위한 도시기상 수치모의 (Numerical Simulation for Urban Climate Assessment and Hazard)

  • 오성남
    • 한국방재학회지
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    • 제2권4호
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    • pp.40-47
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    • 2002
  • Since it is important to understand the bio-climatic change in Seoul for ecological city planning in the future, this paper gives an overview on bio-climate analysis of urban environments at Seoul. We analyzed its characteristics in recent years using the observations of 24 of Automatic Weather Station (AWS) by Korea Meteorological Administration (KMA). In urbanization, Seoul metropolitan area is densely populated and is concentrated with high buildings. This urban activity changes land covering, which modifies the local circulation of radiation, heat and moisture, precipitation and creating a specific climate. Urban climate is evidently manifested in the phenomena of the increase of the air temperature, called urban heat Island and in addition urban sqall line of heavy rain. Since a city has its different land cover and street structure, these form their own climate character such as climate comfort zone. The thermal fold in urban area such as the heat island is produced by the change of land use and the air pollution that provide the bio-climate change of urban eco-system. The urban wind flow is the most important climate element on dispersion of air pollution, thermal effects and heavy shower. Numerical modeling indicates that the bio-climatic transition of wind wake in urban area and the dispersion of the air pollution by the simulations of the wind variation depend on the urban land cover change. The winds are separately simulated on small and micro-scale at Seoul with two kinds of kinetic model, Witrak and MUKLIMO.

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물 빈곤지수와 기후 변동성지수의 국내 적용을 통한 지역별 수자원 특성 분석 (Analysis of Regional Water Resources Characteristics Through Applying the Water Poverty Index and the Climate Variability Index)

  • 홍승진;최시중;백승협;강성규
    • 한국습지학회지
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    • 제13권3호
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    • pp.427-441
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    • 2011
  • 본 연구는 수자원 상황을 평가하기 위하여 기존에 개발된 물 빈곤지수에 지역적 기후변동성 및 홍수피해를 평가할 수 있는 세부지표를 추가한 기후 변동성지수를 개발하여 국내에 적용하였다. 물이용 평가에 초점이 맞추어진 물 빈곤지수 세부지표를 선정하고 지역적 특성에 따른 치수 및 기후변동성 내용이 추가된 지역별 특성인자를 선정하여 1998년부터 2007년까지 물 빈곤지수와 기후 변동성지수에 대한 분석을 실시하여 지역별 변동성을 평가하고 물 부문 정책, 투자 및 적용에 대한 우선순위를 결정하는데 도움을 줄 수 있는 정보를 제공하고자 하였다. 물 빈곤지수는 복지 수준과 물이용간의 관련성을 나타낼 수 있으며 치수와 기후변동성을 함께 고려하여 지역별 특성인자를 추가한 기후 변동성지수는 물이용에 영향을 미치는 인자와 치수 및 기후변화를 함께 고려할 수 있으므로, 지역별로 기후변화에 대응하는 물이용뿐만 아니라 홍수관리에도 사용할 수 있을 것이다.

Some issues on the downscaling of global climate simulations to regional scales

  • Jang, Suhyung;Hwang, Manha;Hur, Youngteck;Kavvas, M. Levent
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2015년도 학술발표회
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    • pp.229-229
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    • 2015
  • Downscaling is a fundamental procedure in the assessment of the future climate change impact at regional and watershed scales. Hence, it is important to investigate the spatial variability of the climate conditions that are constructed by various downscaling methods in order to assess whether each method can model the climate conditions at various spatial scales properly. This study introduces a fundamental research from Jang and Kavvas(2015) that precipitation variability from a popular statistical downscaling method (BCSD) and a dynamical downscaling method (MM5) that is based on the NCAR/NCEP reanalysis data for a historical period and on the CCSM3 GCM A1B emission scenario simulations for a projection period, is investigated by means of some spatial characteristics: a) the normalized standard deviation (NSD), and b) the precipitation change over Northern California region. From the results of this study it is found that the BCSD method has limitations in projecting future precipitation values since the BCSD-projected precipitation, being based on the interpolated change factors from GCM projected precipitation, does not consider the interactions between GCM outputs and local geomorphological characteristics such as orographic effects and land use/cover patterns. As such, it is not clear whether the popular BCSD method is suitable for the assessment of the impact of future climate change at regional, watershed and local scales as the future climate will evolve in time and space as a nonlinear system with land-atmosphere feedbacks. However, it is noted that in this study only the BCSD procedure for the statistical downscaling method has been investigated, and the results by other statistical downscaling methods might be different.

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국제연합개발계획의 기후변화 적응 정책 체계 소개 (UNDP's Adaptation Policy Framework for Climate Change)

  • 신임철;이은정;권원태;임재규
    • 대기
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    • 제15권1호
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    • pp.59-68
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    • 2005
  • United Nations Development Programme (UNDP) introduced the Adaptation Policy Framework (APF) to support the developing countries in order to help to make adaptation policy and strategy to climate change. This study provides the summary of the APF and will help for preparing policy regarding the impact of climate change and its adaptation. APF consists of five basic and two cross-cutting steps. Five basic steps are made of (a) defining project scope and design, (b) assessing current vulnerability and adaptation, (c) assessing future climate-related risks, (d) developing an adaptation strategy, and (e) continuing the adaptation process. Cross-cutting steps consist of engaging stakeholder and enhancing adaptive capacity. The project scope and design process includes four major tasks: scope the project and define its objectives, establish the project team, review and synthesize existing information on vulnerability and adaptation, and design the APF project. The main purpose of assessing current vulnerability and adaptation is to understand the characteristics of current climate-related vulnerability in priority systems and the scope of adaptive responses. Future climate-related risks are assessed in order to characterize future climate-related risks, so that adaptation policies and measures can be designed to reduce the system's exposure to future climate hazard. In developing an adaptation strategy, all of the preceding APF-related work is synthesized into a well-considered strategy that can direct real adaptation action. Continuing the adaptation process is in order to implement and sustain the APF-strategy, polices, and measure. The purpose of involvement of stakeholders is to communicate between individuals and groups about projects. Finally, enhancing adaptive capacity provides guidance on how adaptive capacity can be assessed and enhanced.

전구 및 지역기후 모델 결과에 근거한 동아시아 및 한반도 지역기후 변화 전망 연구 소개 및 고찰 (A Review of Regional Climate Change in East-Asia and the Korean Peninsula Based on Global and Regional Climate Modeling Researches)

  • 홍성유;권원태;정일웅;백희정;변영화;차동현
    • 한국기후변화학회지
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    • 제2권4호
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    • pp.269-281
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    • 2011
  • 전구 및 지역 기후 모델 결과를 분석하여 동아시아와 한반도 지역에 대해 상세한 지역기후의 변화를 전망한 연구를 소개하였다. 특히 IPCC 4차 평가 보고서의 배출 시나리오를 기반으로 국내 연구그룹이 산출한 한반도 지역기후 변화 전망을 소개하고 그 특성을 파악하였다. 배출 시나리오에 따라 강도의 차이가 다소 있지만 미래 한반도의 온난화 경향은 명확한 것으로 나타났다. 강수량의 경우 배출 시나리오와 시기에 따라 다소 상이한 변화 경향을 보이지만, 대부분의 연구에서 공통적으로 미래 집중호우의 발생 빈도와 강도가 증가하는 것으로 나타났다. 이와 같은 지역기후 변화로 인하여 고지대를 제외한 대부분의 남한지역이 아열대 기후구로 점차 변해갈 것으로 전망되며, 이로 인한 생태계와 계절의 변화가 야기될 것으로 예상된다.

An Evaluation of Transfer of Training Effects on Nuclear Power Plant MCR Operators

  • Kim, Jung Ho;Byun, Seong Nam
    • 대한인간공학회지
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    • 제32권1호
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    • pp.77-85
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    • 2013
  • Objective: The aim of this study sets factors from previous research known to impact transfer effects as the independent variables, and examines their relationship with the dependent variables, near transfer effects and far transfer effects. Background: Transfer of Training refers to the application of what learners acquire knowledge and skills in training programs to their job. The ultimate goal of training is to apply what employees learn in training sessions to their workplace. In this sense, transfer of training has been a vital concern for training effectiveness. For training to be effective, trainees(learners) should be able to use what they learn in training program back on the job. Method: For this research purpose, this study conducted a survey on 170 nuclear operators in nuclear education and training center. Of these, survey result from the 167 recruits were sampled. Theoretical model of this study is based on Holton & Baldwin's(2003) distance model of transfer effects. This study sets transfer effects(near transfer, far transfer) as the main dependent variables. Meanwhile, the independent variables are trainee characteristics, training characteristics, organizational transfer climate. Each independent variable has subordinate variables. Subordinate variables of trainee characteristics are self-efficacy, motivation to learn, motivation to transfer and ability to transfer. Subordinate variables of training characteristics are training contents, ability of trainers, training design, training climate. The last Subordinate variables of organizational transfer climate are support of supervisors, support of peer, support of organization. Conclusion: As a analysis result, trainee characteristics appeared to be in effect only significant influence near far transfer of training, the effect of the far transfer of training, there is no significant. In addition, the training characteristics appeared to be having a significant influence on near and far transfer effects. Organizational transfer climate appeared to be having a significant influence on near and far transfer effects. Finally, near transfer effect appeared to be having a significant influence on far transfer effects. Application: Results of this analysis in the study to training organization and training characteristics of the transition environment effects on nuclear power institutions and operators training organization having a significant impact that says. The transfer of knowledge and technology, as well as that can be applied to a new situation in terms of education and training are important characteristics.