• Title/Summary/Keyword: 미래기후

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The Characteristics of Runoff for Hwacheon dam watershed (화천댐 상류유역의 유출거동 특성)

  • Kim, Nam-Won;Lee, Jeong-Eun
    • Journal of Korea Water Resources Association
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    • v.42 no.12
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    • pp.1069-1077
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    • 2009
  • Lately, it is an important concern in water resources research to maintain a stable water supply according to a future climate change and an increase in water use. In Han-River basin, approximately 10 % of water resources that is provided the capital region (Gyeonggi, Seoul etc.) has been reduced as a consequence of the construction of Imnam Dam (storage volume: 27 billion $m^3$) located in the upper Hwacheon Dam upstream area. Therefore, streamflows have decreased in Bukhangang basin, but it could not be evaluated quantitatively. In this study, SWAT-K which is the physically based long-term runoff simulation model, was used in order to evaluate the effect of Imnam Dam on the reduced inflow to Hwacheon Dam according to the change of hydrological condition in the upstream area of Hwacheon Dam. For the model input data of North Korea area, meteorological data of GTS (Global Telecommunication System) were used, and soil maps by FAO/UNESCO (2003) were applied. Temporal variations of water resources is investigated with comparison of observed and simulated inflows at Hawcheon Dam site. Also, annual, monthly, seasonal decreases in water resources were evaluated using the flow duration analysis of simulated streamflows with or without Imnam dam.

Green Port Strategies for Reducing Air Pollution in Port of Incheon (대기오염 저감을 통한 인천항의 Green Port 전략)

  • Han, Chul-Hwan
    • Journal of Korea Port Economic Association
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    • v.27 no.1
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    • pp.281-304
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    • 2011
  • In the energy-climate era, pollution emissions from port activities have a significant issue in international shipping and port community. Thus international organization such as IMO and developed countries are seeking to develop various reduction strategies against air pollution. However Korea has recently conducted several studies concerning air pollution in port industry. The main purpose of the paper is to suggest emission reduction strategies for bulk terminal in Port of Incheon, which handles large amount bulk cargoes as a gateway for the metropolitan area. For this aim, the clean air strategies of the world major ports were considered and air pollution reduction strategies were suggested. The main findings of this paper are as follows. First, the emission reduction strategies for container terminal are should be integrated based on technologies changes, operational changes and market-based measures. Second, the emission reduction strategies for bulk terminal can be effective when use innovative measures during loading, unloading and storage process such as telescopic cascade trimming chute, snake sandwich equipment, dry fog system and dome structure. Finally, investigation on actual conditions of air pollution in Korean ports and development of environmental evaluation scheme for persisting monitoring should be conducted.

A Study on the Flow Characteristics around Tidal Current Turbine (조류발전용 터빈 주위의 유동 특성에 관한 연구)

  • Kim, Bu-Gi;Yang, Chang-Jo
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.18 no.6
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    • pp.610-616
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    • 2012
  • All the countries in the world is currently facing the full scale of energy-climate era currently, and making strong energy policy that will lead to green growth of the future energy resources by utilizing renewable energy as the basis of entering the advanced country becomes the goal of development that satisfies the demand for energy in 21st century. Recently, ocean energy attracted the attention along with the necessity of developing renewable energy. Ocean energy is the one of most prominent recyclable and clean resources that has not been developed yet. So, it is highly required to develop good tidal current energy conversion system in coastal area. The inflow angle that acts against tidal current turbine, seabed effect and the change of efficiency along the occurrence of cavitation were investigated through the wake flow characteristics in this study. Power coefficient degradation by seabed effect did not appear in the condition of this calculation. Efficiency degradation appeared from above $10^{\circ}$ regarding inflow angle and power coefficient was calculated as lower by 7 % at $45^{\circ}$. Torque and power coefficient increased as inflow velocity rose, but power coefficient degradation appeared from above 3m/s when the cavitation happened. So, it was recognized that the larger inflow angle and occurrence of cavitation become the reason for power degradation through the flow characteristics.

An Analysis of Research Trend for Integrated Understanding of Environmental Issues: Focusing on Science Education Research on Carbon Cycle (환경 문제의 통합적 이해를 위한 국내외 연구 동향 분석 -탄소 순환 주제의 과학 교육을 중심으로-)

  • Park, Byung-Yeol;Jeon, Jaedon;Lee, Hyundong;Lee, Hyonyong
    • Journal of The Korean Association For Science Education
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    • v.40 no.3
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    • pp.237-251
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    • 2020
  • Issues on climate change we are facing, such as global warming, are very important as it affects our lives directly. To overcome this, efforts to reduce greenhouse gases emissions (e.g., carbon dioxide) are necessary and these efforts should be based on our integrated understanding of carbon cycle. The purpose of this study is to examine the research trend on carbon cycle education and to suggest the value and direction of carbon cycle education for students who will be citizens of the future. We analyzed 52 carbon cycle education related studies collected from academic research databases (RISS, KCI, ERIC, Google Scholar, and others). As a result, we conclude that resources are still limited and more researches on verification and utilization of developed program, development of accurate and comprehensive tools for students' recognition and level assessment, developing educational model or teacher professional development, providing more appropriate curriculum resources, and the use of various topics or materials for carbon cycle education are necessary. Students' comprehensive understanding of the carbon cycle is important to actively react to the changes in the global environment. Therefore, to support such learning opportunities, resources that can be connected to students' daily experiences to improve students' understanding of carbon cycle and replace misconceptions based on the verification of existing programs should be provided in the classroom as well as the curriculum. In addition, sufficient exemplary cases in carbon cycle education including various materials and topics should be provided through professional development to support teachers teaching strategies with carbon cycle.

Comparative Analysis of Seawater Desalination Technology in Korea and Overseas (국내 및 해외의 해수담수화 기술 비교분석)

  • Hwang, Moon-Hyun;Kim, In S.
    • Journal of Korean Society of Environmental Engineers
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    • v.38 no.5
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    • pp.255-268
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    • 2016
  • Climate change has increased the need to secure a new water resource in addition to the traditional water resources such as surface water and ground water. The seawater desalination market is growing sharply in accordance with this situation in Korea, "seawater engineering & architecture of high efficiency reverse osmosis (SEAHERO)" program was launched in 2007 to keep pace with world market trend. SEAHERO program was completed in 2014, contributed to turn the domestic technology in evaporative desalination technology to RO desalination technology. Currently, it is investigated that the average specific energy consumption of the whole RO plant is around $3.5kWh/m^3$. The Busan Gi-jang plant has shown $3.7{\sim}4.0kWh/m^3$, including operational electricity for plant and maintenance building. Although not world top level, domestic RO technology is considered to be able to compete in desalination market. Separately, many researchers in the world are developing new technologies for energy savings. Various processes, forward osmosis (FO), membrane distillation (MD) process are expected to compete with RO in the future market. In Korea, FO-RO hybrid process, MD and pressure retarded osmosis (PRO) process are under development through the research program in Ministry of Land, Infrastructure and Transport (MOLIT). The desalination technology level is expected to decrease to $2.5kWh/m^3$.

Rural Amenity Contents in the Textbooks of Agricultural High School (농업계고등학교 교과서를 통해 살펴본 농촌어메니티 교과내용)

  • Kim, Eun-Ja;Ryu, Cheong-San;Kang, Bang-Hun;Yoon, Soon-Duck;Kim, Sang-Bum;Hwang, Jeong-Im;Rhee, Sang-Young
    • Proceedings of the Korean Society of Community Living Science Conference
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    • 2009.09a
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    • pp.93-93
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    • 2009
  • 본 연구는 농업 농촌의 미래세대 주역으로 활동하게 될 농업계 고등학교 학생들에게 교과서를 통한 학습기회 제공이 무엇보다 중요함에 따라, 그들이 배우고 있는 농업계고등학교 교과서를 대상으로 농촌어메니티 교과내용을 분석함으로써 농촌어메니티 및 녹색가치 구현에 대한 인식 중대를 도모하고 올바른 농업 농촌의 가치관을 형성시키는데 기여하고자 한다. 분석 교과서는 원예, 축산, 농기계, 식품가공 등 총 39종의 농업계 교과서를 대상으로, 농촌어메니티자원 37종을 활용한 어메니티 관점으로 내용분석이 이루어졌다. 그 결과 환경자원과 자연자원을 포함한 자연적 자원의 경우(대기질, 수질, 비옥한 토양, 미기후, 지형 등) 141개로 17.6%를 차지하고 있는 것으로 나타났으며, 역사자원, 경관자원을 포함한 문화적 자원(문화재, 전통건조물, 신앙공간 등)의 경우 219개로 27.4%를 나타내었다. 또한 시설자원, 경제활동자원, 공동체활동자원을 포함하는 사회적 자원(공동생활시설, 기반시설, 도농교류활동, 생활공동체활동 등)인 경우 440개, 55%인 것으로 나타나 전체 39종의 교과서를 대상으로 어메니티 관점으로 하여 교과내용을 분석한 결과 총 800개가 수록되어 있는 것으로 분석되었다. 내용분석은 제시유형(문장, 사진, 삽화, 그래프, 표), 교육적 성격(준비학습, 내용이해, 기능습득, 실습활동, 문제해결, 태도형성, 기타)을 기준으로 분석하여 해당 내용이 농촌어메니티를 적절하게 표현하였는지에 따라 판정 여부를 제시하였다. 또한 교과서를 유형별로 구분하여 분석해 본 결과 A유형의 교과서는 9권으로 351개의 내용분석이 이루어졌고, B유형의 교과서는 16권으로 322개의 내용분석이 이루어졌으며, C유형의 경우 14권으로 127개의 내용분석이 이루어졌다. A와 B유형 교과서는 농촌어메니티를 나타낼 수 있는 교과서 내용 요소가 많은 유형이고, C유형은 주로 기술 및 관리 기법 등과 관련된 내용의 교과서였다. 제시유형별 교과내용을 분석한 결과 A유형의 교과서에는 사진 185, 문장 125, 삽화 24 순으로 나타났으며, B유형에는 사진 144, 문장 136, 삽화 37개, C유형에는 사진 57, 문장 55, 삽화 11개의 순으로 나타났다. 교육적 성격별 분석결과 A유형, B유형, C유형 두 내용이해,에 대한 교과내용이 절대적으로 우선순위를 나타냈으며, B유형의 경우 기능습득에 대한 교육적 성격도 다소 높은 것으로 분석되었다.

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Soil Resilience and Threat Factors Related to Agricultural Environment (농업환경 분야에서의 토양 리질리언스와 그 위협 요인)

  • Kim, Min-Suk;Min, Hyun-Gi;Hyun, Seung-Hun;Kim, Jeong-Gyu
    • Ecology and Resilient Infrastructure
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    • v.7 no.1
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    • pp.26-42
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    • 2020
  • Soils are the basis for plant rooting and ecosystem creation, the site of life for humankind, and require much time for their creation, so there will be no disagreement about the importance and necessity of soil conservation and management. Soil resilience is the ability of soils to maintain their original structure and function (resistance and recovery) from various kinds of disturbances, and is an indispensable field of study that prepares for a future with high uncertainty and unpredictability. Therefore, this study summarizes the concept and necessity of soil resilience, which is not yet widely known in Korea, and the contents of previous studies were reviewed. This study was carried out with the aim of contributing to lowering the threshold for entry into resilience research for domestic and foreign researchers who are new to soil resilience. In the first part of this study, we introduced resilience and soil resilience, and in the second part, we summarized the main causes of stress or disturbance that have been studied by many soil resilience researches. This makes it easy to find the references authors need. It is virtually impossible to find the same soil environment because there is no same area on the earth with all the same rock, climate, human activity, and culture, suggesting that each soil has its own uniqueness. Therefore, the researcher who wants to utilize the results of this study should take into consideration the specificity of the soil and the region to which the soil resilience is introduced, and modify it if necessary. In addition, efforts should be made to strengthen the network of soil resilience researchers to create a basis for sharing and actively utilizing the research results.

A Study on Design of Optimal Location for Renewable Energy Facility Using GIS (GIS를 사용한 재생에너지설비 최적 위치 설계에 관한 연구)

  • Jung, Moon-Seon;Moon, Chae-Joo;Chang, Young-Hak;Kim, Young-Gon;Lee, Sook-Hee
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.2
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    • pp.357-368
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    • 2018
  • For well over 100 years, oil has enabled remote communities to generate electricity and enjoy the benefits of a consistent electrical supply. Relying solely on oil for electricity generation has left island and remote communities exposed to several risks and drawbacks. Oil-based electricity generation is often more expensive and subject to price volatility, which can result in the use of risky fuel hedging strategies. The residents of islands and remote communities express concern over the future impacts of climate change or insist on their opinions for the corresponding action with reduction of carbon emissions. These risks and drawbacks can be overcomed with continuing cost reductions in solar, wind, and energy storage technologies by maker. Reducing costs is not always a straightforward process, relying on more diversely and renewably arranged renewable energy sources led to reduced local construction cost in every situation reviewed in this study. In this paper, a convenient and simple design solution which will facilitate the optimum location and transmission route of renewable energy facility using GIS(Geographic Information System) is proposed. The suggested solutions exercised to the case of geomoon island using GIS and identified by local site survey.

Factors Influencing Disaster Preparedness of Students Studying Emergency Rescue (일 지역 응급구조(학)과 학생들의 재난대비에 영향을 미치는 요인)

  • Choi, Seong-Woo;Ju, Ho-Hyeon
    • The Journal of the Korea Contents Association
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    • v.16 no.7
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    • pp.651-658
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    • 2016
  • As three sides of Korea are surrounded by the sea and it is geographically located at an intersect point for continental and maritime climate, the climate crisis and global warming factors that lead to large-scale natural disasters such as typhoons, floods, and tsunami as well as disasters and damage to humans are increasing due to rapid urbanization and industrialization. Therefore, this study measured the ability of people to cope with disaster in students studying emergency rescue who will play a central role in safety and casualty control in disaster areas in order to figure out the factors that will influence their overall ability. As a result, the following things were discovered: Those who had the experience of listening to information on how to cope in a disaster scored significantly higher in disaster coping scores than those who did not. In comparison with subjects who responded that they were not satisfied with their emergency rescue training at school, those who responded that they were satisfied with their education scored significantly higher in their disaster coping scores. In comparison with subjects who responded negatively to the questions on experience in emergency rescue training as an extracurricular program, those who responded affirmatively to the questions were evaluated as significantly higher in their disaster coping scores. This study suggests that specific strategies can be taken and are needed to improve the ability to cope with disasters in students who are studying emergency rescue.

A Study on the Flood Reduction in Eco-Delta City in Busan using Observation Rainfall and Flood Modelling (관측 강우와 침수모의를 이용한 부산 에코델타시티 수해저감에 관한 연구)

  • Kim, YoonKu;Kim, SeongRyul;Jeon, HaeSeong;Choo, YeonMoon
    • Journal of Wetlands Research
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    • v.22 no.3
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    • pp.187-193
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    • 2020
  • The increase in the area of impervious water due to the recent abnormal weather conditions and rapid urbanization led to a decrease in the amount of low current, resulting in an increase in the amount of surface runoff. Increased surface runoff is causing erosion, destruction of underwater ecosystems, human and property damage in urban areas due to flooding of urban river. The damage has been increasing in Korea recently due to localized heavy rains, typhoons and floods. As a countermeasure, the Busan Metropolitan Government will proceed with the creation of the Eco-Delta City waterfront zone in Busan with the aim of creating a future-oriented waterfront city from 2012 to 2023. Therefore, the current urban river conditions and precipitation data were collected by utilizing SWMM developed by the Environment Protection Agency, and the target basin was selected to simulate flood damage. Measures to reduce flood damage in various cases were proposed using simulated data. It is a method to establish a disaster prevention plan for each case by establishing scenario for measures to reduce flood damage. Considering structural and non-structural measures by performing an analysis of the drainage door with a 30-year frequency of 80 minutes duration, the expansion effect of the drainage pump station is considered to be greater than that of the expansion of the drainage door, and 8 scenarios and corresponding alternatives were planned in combination with the pre-excluding method, which is a non-structural disaster prevention measure. As a result of the evaluation of each alternative, it was determined that 100㎥/s of the pump station expansion and the pre-excluding EL.(-)1.5m were the best alternatives.