• Magazine of the Korean Society of Hazard Mitigation
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• v.2 no.4 s.7
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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.

• Journal of People, Plants, and Environment
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• v.24 no.2
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• pp.153-167
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• 2021

Background and objective: With the revision of the Act on Urban Parks, Green Areas, Etc. in 2013, the "urban agricultural park" was newly established under the subcategory of "themed park," thereby establishing the institutional basis for the creation of urban agricultural parks. However, urban agricultural parks are still in the early stages of their introduction. There is a lack of research on direction setting and specific operation management that considers urban residents' needs and the city's physical infrastructure. Methods: We utilized the public service design process suggested by the Ministry of the Interior and Safety of the Republic of Korea in 2019 to identify problems and develop directions for urban agricultural parks. The process consisted of the following four steps: Understanding, Discovering people's needs, Defining real problems, and Developing ideas. Results: As four types of ideas for revitalizing urban agricultural parks, 'information users want to know,' 'user participation in design,' 'venue for local communities,' and 'urban agricultural parks as health and rest areas' were derived. This means that urban agricultural parks must provide the information users want; users must plan, decide, and implement such information by directly participating in the creation and efficient management and operation of urban agricultural parks; and urban agricultural parks must be used as a venue for local communities. Urban agricultural parks should also be spaces for health and relaxation. Conclusion: Urban agricultural parks should avoid the unified space and passive participation patterns of existing urban parks, and become real spaces for resident participation that can satisfy all the production, leisure, landscape, ecology, and psycho-social needs of the users of urban agricultural parks. Furthermore, it is necessary to introduce a more systematic and diverse operating system so that it can work to revitalize the local community and connect organically with the function of the city.

• Atmosphere
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• v.20 no.1
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• pp.13-26
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• 2010

The Urban Canopy Model (UCM) implemented in WRF model is applied to improve urban meteorological forecast for fine-scale (about 1-km horizontal grid spacing) simulations over the city of Seoul. The results of the surface air temperature and wind speed predicted by WRF-UCM model is compared with those of the standard WRF model. The 2-m air temperature and wind speed of the standard WRF are found to be lower than observation, while the nocturnal urban canopy temperature from the WRF-UCM is superior to the surface air temperature from the standard WRF. Although urban canopy temperature (TC) is found to be lower at industrial sites, TC in high-intensity residential areas compares better with surface observation than 2-m temperature. 10-m wind speed is overestimated in urban area, while urban canopy wind (UC) is weaker than observation by the drag effect of the building. The coupled WRF-UCM represents the increase of urban heat from urban effects such as anthropogenic heat and buildings, etc. The study indicates that the WRF-UCM contributes for the improvement of urban weather forecast such nocturnal heat island, especially when an accurate urban information dataset is provided.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.31-39
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• 2007

Urban transit is defined as "Transportation facilities and carriage by track like railway where is constructed and operated in urban area" in Korean urban railway law. Several hundreds of urban transits are operated in the world, and Korea also has 19 lines 590km in several cities like Seoul, Busan etc. In this paper, we classify urban transits and describe the general characteristics of urban transit. And then review major technical issues and present the direction to technical progress.

• International Journal of Railway
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• v.4 no.4
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• pp.81-85
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• 2011

This paper discusses the development of a generic train operation model from a set of Korean Urban Transit Regulations such as Regulation for Train Operation of Urban Transit, Regulation for Safety Requirements of Urban Transit and so on. It is to communicate with various stakeholders on urban transit system, and to elicit copious requirements in performance of the urban transit train operation based on the model.

• Proceedings of the KSR Conference
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• 2003.10c
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• pp.535-540
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• 2003

Urban transit, which takes an important role of traffic volume, is operated in four different urban communities and constructed in two urban communities. However, the urban transit of each communities has different system in operation and construction. It is not efficient to construct and operate. Furthermore, is difficult to maintain urban transit system. In this paper, the standardization of power supply system for urban transit has been performed to solve above problems.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.23 no.6
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• pp.125-135
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• 2020

The uncontrolled urban expansion causes various social, economic problems and natural/environmental problems. Therefore, it is necessary to forecast urban expansion by identifying various factors related to urban expansion. This study aims to forecast it using a decision tree that is widely used in various areas. The study used geographic data such as the area of use, geographical data like elevation and slope, the environmental conservation value assessment map, and population density data for 2006 and 2018. It extracted the new urban expansion areas by comparing the residential, industrial, and commercial zones of the zoning in 2006 and 2018 and derived a decision tree using the 2006 data as independent variables. It is intended to forecast urban expansion in 2030 by applying the data for 2018 to the derived decision tree. The analysis result confirmed that the distance from the green area, the elevation, the grade of the environmental conservation value assessment map, and the distance from the industrial area were important factors in forecasting the urban area expansion. The AUC of 0.95051 showed excellent explanatory power in the ROC analysis performed to verify the accuracy. However, the forecast of the urban area expansion for 2018 using the decision tree was 15,459.98㎢, which was significantly different from the actual urban area of 4,144.93㎢ for 2018. Since many regions use decision tree to forecast urban expansion, they can be useful for identifying which factors affect urban expansion, although they are not suitable for forecasting the expansion of urban region in detail. Identifying such important factors for urban expansion is expected to provide information that can be used in future land, urban, and environmental planning.

• Journal of the Korean Geographical Society
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• v.31 no.2
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• pp.198-212
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• 1996

In celebrating a half century history of the Korean Geographical Society, this paper is concerned about research trends of the urban geography in Korea by reviewing of 449 papers and 15 books mainly in an urban geography field. The findings are summarized as follows: (1) The development of the urban geography in Korea has several stages; \circled1 The launching stage just after 1945; \circled2 the premature stage in the 1960s; \circled3 the taking-off stage in the 1970s; \circled4 the maturing stage in the 1980s; and \circled5 culminating stage in the as of 1990s. (2) The earlier studies had a few limited research themes without major debating issues. In the 1970s, various research themes had been introduced in the urban geography. More diverse themes have been studied in urban geography after the 1980s. The major themes in the urban geography included urbanization, urban structure, urban system, urban economic structure and so on. (3) The most frequent research area for the Korean urban geographers has been the Seoul metropolitan area followed by Kyongsang-Province region. Outside Korea, the most frequent research areas are the American cities followed by the cities of Japan, Canada, and France. (4) The urban geography in Korea has played a major role in introducing the quantitative methods and techniques into geography. For example over 30.5% out of papers in urban geography has taken the quantitative techniques in the past 35 years during the 1960-1994 period. The papers inside urban geography have counted more than 60 percent from research papers in major university journals and took 34.6 percent from the papers of the Journal of Korean Geographical Society.

• Journal of People, Plants, and Environment
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• v.21 no.6
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• pp.461-471
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• 2018

The role of urban agriculture should not be limited as a small-scale crop cultivation activity as it was, but it has to be considered as an entire process of a agriculture activity for the restoration of the city community. This study is based on the assumption that there has been a significant change in urban lifestyle and urban farming preference, considering the overall improvement in standard of living after implementation of five day work week system. It was conducted for urban citizens who were interested in actual urban agriculture for ages 19 and over who visited the Korea Urban Agriculture Exhibition in 2018. Only 115 valid samples were used for the empirical analysis. To analyze the demographic characteristics and effects of urban agriculture, frequency analysis and descriptive statistics were conducted. In order to analyze the reliability and validity of the measurement variables of the effect, the variables that deteriorate the validity were removed and 15 variables of the urban agricultural effect were selected. According to the result of factor analysis, three factors were extracted as follows: socially sustainable effect, negative effect and economically sustainable effect. In order to examine the effects of urban agriculture depending on income level, the one-way ANOVA, which is a statistical technique for verifying differences in the sample means, was performed. The psychological stability of people, the recovery of humanity through communion with nature, and the vitalization of agriculture linked with local agriculture had significant correlations with income level. The negative effect showed no significant correlation with income level. The improvement of the local environment was found to have an impact in relation with income level. We expect that there will be more studies on policies for the new types and models of urban agriculture in order to make it easier for urban citizens to approach it.

• Journal of Korean Society for Atmospheric Environment
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• v.16 no.1
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• pp.37-47
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• 2000

The Urban thermal environment is influenced and modified in many ways. One modification is brought by the anthropogenic heat generation emitted from the combustion processes and the use of energy such as industrial, domestic and traffic procedure. The anthropogenic heat generation affect an the increase of urban temperature, the well-known urban heat islands. The study on the urban thermal environment needs a great deal of the statistic data about the inner-structure of urban, the contribution of different constructions and the traffic amount on urban thermal environment in finite region. In order to overtake a quantitative analysis of effect of the anthropogenic heat, a distribution map of the urban anthropogenic heat was made using hte data of the energy consumption used at the several constructions and traffic amount of vehicles in Pusan Metropolitan. Annual mean heat flux over the 4$\textrm{km}^2$ urbanized area in Pusan is 41.5W/$m^2$, ranging from 31.4W/$m^2$ in summertime to 59.5W/$m^2$ in wintertime and maximum diurnal anthropogenic heat generation is corresponding to 10% of irradiance during summertime.