• Journal of the Korean Society for Railway
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• v.11 no.5
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• pp.482-488
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• 2008

Seoul Metro Line 9 (SML9) will link Gimpo Airport to the Gangnam district opening in May 2009. SML9 has a new model in Korea constructed by metropolitan government and private company and operated by specialized public transportation service provider. SML9 is confronted with tough environment of stagnated public transportation and strong competitor, Olympic city expressway. Consequently SML9 must lead the maximum efficiency by using its material and human resource. Hereupon, I propose renovation plans from 3 viewpoints of operation field of SML9: Rapid-Local combination, close connection with other transportation and direct connecting service into Incheon Air-port Railroad(AREX).

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.160-160
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• 2021

과거 대규모 댐 건설 등 물 개발 중심에서 벗어나 효율적이고, 균형 잡힌 물관리 중심으로 '물관리 패러다임'이 변화되고 있다. 물관리 일부인 수질은 생활하수, 산업폐수, 농·축산 폐수에 의해 하천 및 호소 오염의 심각성이 대두되어, 수질 개선에 관한 연구가 진행되고 있다. 한강 유역은 한강, 남한강, 북한강 등 여러 수계로 구성되어 있으며, 서울을 포함한 주요 도시지역을 포함하고 있다. 한강 유역은 도시 및 농촌지역이 혼재되어 있으며, 도시지역의 경우 수변구역이 주민생활과 밀접한 유역이 많다. 한강대권역관리계획, 지자체별 총량제도를 통하여 관리를 하고 있으나, 각각의 유역별 특성이 다양하여 여러 이슈와 환경적 문제점이 발생하고 있어 유역에 적합한 수질개선 방안이 필요한 실정이다. 국내에서는 수질오염총량제도를 통해 수계의 수질을 관리하고 있지만, 오염물질의 부하량을 기준으로 수립하여 데이터의 다양성을 나타내기에 한계가 있다. 본 연구에서는 하천의 수계를 단위유역 단위가 아닌 중권역 단위로 구분하여 수질 인자의 농도를 활용하여 인자 간의 관계가 하천에 주는 영향을 보고자 한다. 수질 측정망에서 수집된 수질 데이터를 활용하여 여러 기법의 데이터 분석을 통해 한강 유역 수질의 특성과 경향을 시각화 그래프로 나타낸 결과를 토대로 유역특성을 반영한 수질 개선방안을 도출하고자 한다.

• Journal of Wetlands Research
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• v.21 no.3
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• pp.244-250
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• 2019

Due to the industrial development and population growth, it has recently been shown that there are many problems caused by the rinked treatment water in local goverments and sewage treatment plants. The rinked treatment water has a characteristic of low flow rate and high concentration unlike general sewage. These characteristics increase sewage treatment difficulty and sewage treatment fee of sewage treatment facilities. Among the many influencing factors that increase sewage treatment unit cost, 'linked treatment load/design inflow load (%)' was derived as the most correlated factor. Through the selection and modeling of sewage treatment plants, the excess scope of design discharge water quality was investigated under the conditions of temperature and the conditions of 'linked treatment load/design inflow load (%)' taking into account the effects of the four seasons. The study found that for TN, 'linked treatment load/design inflow load (%)' was 19.7%, 22.6%, 25.1%and 27.7%, respectively, under conditions of $5^{\circ}C$, $10^{\circ}C$, $20^{\circ}C$ and $25^{\circ}C$. In case of TP, 'rinked treatment load/design inflow load (%)' was 10.7%, 12.2%, 15.6% and 17.5% at $5^{\circ}C$, $10^{\circ}C$, $20^{\circ}C$, and $25^{\circ}C$, respectively, under conditions of $5^{\circ}C$, $10^{\circ}C$, $20^{\circ}C$ and $25^{\circ}C$.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.5
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• pp.162-170
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• 2021

The Smart City Living Lab is becoming important as a local innovation platform to develop urban solutions. In January 2018, the 4th industrial innovation committee, which was a direct subordinate from the president, empathized citizens' participation and their roles within the Smart City [Urban Innovation and Future Growth Engine-Creating Smart City Strategy]. This was the starting point of the living lab. The central government and local governments have been promoting various types of living labs to encourage citizens to participate. On the other hand, due to the lack of systematic concepts and theories for practicing and structuring living labs, the practice is not performed well. This study aimed to develop systematic approaches and implementation methods of the public-led Smart City Living Lab. The Full-cycle Smart City living Lab model was designed by integrating smart city living lab work processes, as suggested in the standards of the national land plan, double design diamond framework, which is a type of innovative design methodology, and design thinking process. The entire cycle Smart City living lab model requires four components to practice the living lab, such as framework, module, process, and methodologies. In the future, this model is expected to be incorporated in the Smart City Living Lab.

• Journal of Korean Society of Disaster and Security
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• v.15 no.4
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• pp.39-46
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• 2022

The rainfall characteristics such as heavy rains are changing differently from the past, and uncertainties are also greatly increasing due to climate change. In addition, urban development and population concentration are aggravating flood damage. Since the causes of urban inundation are generally complex, it is very important to establish an appropriate flood prevention plan. Thus, the government in Korea is establishing standards for disaster prevention performance for each local government. Since the concept of the disaster prevention performance target was first presented in 2010, the setting standards have changed several times, but the overall technology, methodology, and procedures have been maintained. Therefore, in this study, studies and technologies related to urban disaster prevention performance were reviewed using the scientometric analysis method to review them. This analysis is a method of identifying trends in the field and deriving new knowledge and information based on data such as papers and literature. In this study, papers related to the disaster prevention performance of the Web of Science for the last 30 years from 1990 to 2021 were collected. Citespace, scientometric software, was used to identify authors, research institutes, countries, and research trends, including citation analysis. As a result of the analysis, consideration factors such as the the concept of asset evaluation were identified when making decisions related to urban disaster prevention performance. In the future, it is expected that prevention performance standards and procedures can be upgraded if the keywords are specified and the review of each technology is conducted.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.4
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• pp.428-437
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• 2017

Recently, local government has established a development strategy which takes into account the quality of each area, in order to solve the problems posed by poor development, hindrance of the urban landscape, the limits imposed by relevant laws, etc. However, the number of floors is an important factor which determines the urban landscape, planning density and quality of the external space. This planning factor has a very different effect according to the terrestrial circumstances, number of households, underparking ratio, green space ratio and floor area ratio. Therefore, in this study, a case analysis and case study are conducted and the correlation between each index is clarified. The conclusions of this study are follows. Firstly, flexibility should be ensured by taking into consideration the density indicators, average number of floors, and residential environmental performance measures in related laws and systems. Secondly, it is necessary to develop a wide-area planning method that extends the planning concept from the beginning of planning to neighboring blocks or cities. Thirdly, deregulation measures should be implemented, such as establishing specialized strategies for each region, and regulatory measures for encouraging different types of development.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.742-742
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• 2012

한국건설기술연구원 하천실험센터는 이수, 치수, 환경을 조화시키는 하천기술을 개발하기 위하여 2009년 11월 경상북도 안동시 남후면 하아리 낙동강변에 준공되었으며 초당 8톤의 인공홍수발생이 가능한 3개의 실험수로와 유 출입수조, 다목적호수실험장, 저류지 및 연구동으로 이루어져 있다. 본 연구는 하천실험센터의 식생과 3가지 유형(본류형, 자연제방지류형, 인공제방지류형)의 인근 하천식생을 비교분석하여 하천실험센터의 현재 식생환경을 파악하고 차후 연구의 기초선 자료로 활용하기 위하여 수행되었다. 2011년 7월부터 9월 사이에 하천실험센터(급경사수로, 직선수로, 사행수로, 유출수조, 자연식생보존구간), 낙동강 본류, 상리천, 하아천에서 대표성을 갖는 장소 각각 1개 지소를 선정하여 식물상조사 및 식생단면조사를 진행하였으며 조사된 자료를 바탕으로 습생도, 교란도, 외래종율, 종다양성지수를 산출하였다. 또한 군집분석(Cluster Analysis)을 통하여 현재 하천실험센터의 식생환경이 타 조사지의 하천식생과 비교하여 어떤 유사성을 보이는지 확인하였다. 전체조사구간에서 총 108종류의 식물이 출현하였다. 3개의 실험수로는 수 습생식물의 종수가 일반하천의 수 습생식물의 종수보다 적었으며 반면에 육상식물의 종수는 더 많게 조사되었다. 또한 1 2년 식물의 경우 실험수로에서 더 많이 출현하였고 다년생초본과 목본은 소수였다. 하천실험센터의 자연식생보존구간의 경우 총 식물 종수 및 수 습생식물의 종수가 최대값을 나타내었고 식물상의 출현유무를 바탕으로 군집분석을 수행한 결과, 하천실험센터의 실험수로는 낙동강 본류, 상리천, 하아천과 유사도가 낮게 구분되었으며 자연식생보존구간은 낙동강 본류 및 상리천과 유사도가 높게 분류되었다. 하천실험센터의 실험수로는 준공당시 기존의 식생이 모두 제거된 상태에서 인위적으로 조성되었기 때문에 현재까지는 하천식생의 특징이 두드러지지 않으며 육상식생에 가까운 식생환경을 나타내고 있다. 자연식생보존구역의 경우 다양한 버드나무류와 초본류가 정착되어 있으며 타 대상지에 비하여 가장 뛰어난 생태성을 가지고 있다. 하천실험센터는 하천실험을 위한 장소이나 그 자체로 생태가치가 높으며 차후 생태연구, 홍보, 교육활동에 유용하게 활용할 수 있는 잠재력을 내포하고 있다.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.64-64
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• 2023

황강댐은 임진강 상류 군사분계선으로부터 약 42km떨어진 위치에 존재하며 약 3~4억톤의 규모로 추정된다. 이에 우리나라는 약 7천만톤 규모의 군남홍수조절지를 건설하여 임진강 상류로부터 기인하는 홍수를 방어하고 황강댐의 무단방류에 대비하고 있다. 과거 2009년 9월 6일 임진강 상류 황강댐에서의 대규모 방류로 인해 경기도 연천군 일대에 홍수가 발생하여 이로 인한 인명 및 재산피해가 발생한 바 있으며, 2020년 8월 5일에는 장마전선으로 인한 폭우와 더불어 임진강 필승교 수위관측소의 수위가 급상승하면서 관측 이래 역대 최고수위가 발생하여 홍수경보가 발령되고 인근 주민이 대피하는 사례가 발생하였다. 또한, 2022년 6월 27일부터 발생한 장마전선 및 집중호우로 인해 임진강 필승교 수위관측소의 수위가 급상승하면서 홍수주의보가 발령되고 인근 주민이 대피하는 사례가 발생하였으며, 7월에는 비가 내리지 않는 상황에서 황강댐의 방류로 추정되는 유입량이 필승교 수위관측소와 군남홍수조절지에서 관측되었다. 이에 본 연구에서는 인공위성 영상에서 추출한 황강댐의 수위를 이용하여 수문모형과 저수지 운영 알고리즘을 구축하고 당시 발생한 홍수사례를 분석하여 황강댐의 운영방식을 추정하였다. 분석결과, 2020년 8월 5~7일 사이에 발생한 유입량의 경우 자체 유역 유입량은 전체 유입량대비 약 33%이나 북한 황강댐으로부터 추가로 방류된 양은 약 67%로 군남홍수조절지 유입량의 3/2 가량이 북한 황강댐의 방류량으로부터 발생된 것으로 보이며 2021년 6월에도 유사한 양상을 보였다. 하지만, 북한 황강댐의 운영방식이 용수공급을 위한 고수위 유지 운영방식에서 홍수기에 댐 월류 및 파괴를 방지하기 위한 사전방류를 수행하는 것으로 추정되었다.

• Journal of Korea Water Resources Association
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• v.56 no.4
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• pp.261-272
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• 2023

In recent years, natural disasters such as heavy rainfall and typhoons have occurred more frequently, and their severity has increased due to climate change. The Korea Meteorological Administration (KMA) currently uses the same criteria for all regions in Korea for watch and warning based on the maximum cumulative rainfall with durations of 3-hour and 12-hour to reduce damage. However, KMA's criteria do not consider the regional characteristics of damages caused by heavy rainfall and typhoon events. In this regard, it is necessary to develop new criteria considering regional characteristics of damage and cumulative rainfalls in durations, establishing four stages: blue, yellow, orange, and red. A classification model, called DSCM (Disaster Severity Classification Model), for the four-stage disaster severity was developed using four machine learning models (Decision Tree, Support Vector Machine, Random Forest, and XGBoost). This study applied DSCM to local governments of Seoul, Incheon, and Gyeonggi Province province. To develop DSCM, we used data on rainfall, cumulative rainfall, maximum rainfalls for durations of 3-hour and 12-hour, and antecedent rainfall as independent variables, and a 4-class damage scale for heavy rain damage and typhoon damage for each local government as dependent variables. As a result, the Decision Tree model had the highest accuracy with an F1-Score of 0.56. We believe that this developed DSCM can help identify disaster risk at each stage and contribute to reducing damage through efficient disaster management for local governments based on specific events.

• Journal of Environmental Impact Assessment
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• v.33 no.3
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• pp.131-141
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• 2024

The environmental impact assessment have been played important role for sustainable development of the country. Meantime, various studies have been conducted for scientific and effective environmental impact assessment. Howeverthe quantitative data such as regional distribution status and development characteristics according to the type of development project, environmental changes due to development projects, and spatial-temporal changes are insufficient, currently. In this study, we investigated the eco-friendliness of major development projects (industrial complex, urban development, tourist complexes, and waste disposal equipments) by integrating the EA-INDEX of each development projects which were reported by prior researches. As a result, we found that the eco-friendliness of development projects tended to gradually increase overtime due to the increase in eco-friendliness in the protection of living environment sector. The protection of living environment sector was a major factor in the the eco-friendliness of industrial complexes and urban development projects. In the case ofroad construction, landfill and tourist complex development projects, the natural environment conservation sector was a major factor in the eco-friendliness of the project. As a result of analyzing the eco-friendliness of development projects by local government, the eco-friendliness of development projects promoted and implemented in Ulsan, Jeonnam, and Gwangju was higher compared to other regions, and it was relatively low in Daejeon, Gyeongnam, and Daegu. This study is considered to be significant in that it conducted a quantitative analysis of the eco-friendliness of development projects carried out over a relatively long period of time throughout South Korea by dividing them by year and local government.