• Title/Summary/Keyword: urban expansion

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GIS and Statistical Techniques used in Korea Urban Expansion Trend Analysis (GIS와 통계기법을 이용한 대한민국 도시확장 패턴분석)

  • Son, Jung-Woo;Jeon, Sung-Woo;Choi, Chul-Uong
    • Journal of Korean Society for Geospatial Information Science
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    • v.17 no.4
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    • pp.13-22
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    • 2009
  • Urban expansion has caused environmental problems, traffic jam and real estate. Trend analysis of Urban expansion is needed for analysis and prediction of the existing problem-solving, urban planning and land use. In this study, We constructed database based on MOE(Minister of environment)'s landcover(1980's, 2000's), 1: 25,000 digital topographical map using of DEM and data of the National Statistical Office for urban and build up expand analysis of South Korea. As a result, The rate of increase in population of Gyeonggi-do, Incheon and Ulsan are high but Jeollanam-do is low. Area of development zone was 2.15 fold increase in comparison with before it. Slope aspect is south or east and urban expansion was increase in district such as Chungcheongnam-do, Gyeonggi-do, Jeollanam-do. Existing road of accessibility was high than development zone. Metropolitan city developre it. In conclusion, we found that South Korea urban expansion was developed from metropolitan city. In natural topographical conditions, the development was progress advantageous zone to disadvantageous zone. Also, we found that population was rapidly increase with new development as the center zone in urban expansion zone.

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A Study on the Change of Urban Spatial Structure and Transformation of circumjacent Lot by Course of the Construction of Railroads and the Dismantlement of Eupseong in the Early 20th Century (20세기 초 철도부설과 읍성해체에 따른 도시공간구조와 주변 필지 변화에 관한 연구)

  • Kim, Dae-Jung;Cho, Jae-Mo
    • Journal of architectural history
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    • v.28 no.2
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    • pp.31-40
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    • 2019
  • Considering the situation in the early 20th century when the existing urban system centered on urban areas began to change, the biggest factors causing urban structural changes in urban areas are construction of railroad and urban dismantling. The change process of Eupseong, in the microscopic viewpoint, can be understood as a process of change in the course of dismantlement of town's demarcation, improvement of accessibility and urban expansion due to the construction of railroads, process of urban expansion following the crumbling boundaries and structural changes. This study aimed to look at the transformation process of the Eupseong in the early 20th century, focusing on the demolition of the castle and the railway construction from a microscopic point of view of city.

A Space Syntactic Study on Urban Expansion and Decline of the Old City Center: Focusing on Jeju City (도시확장과 원도심 쇠퇴에 관한 공간구문론적 고찰: 제주시 동(洞) 지역을 중심으로)

  • Kim, Seonghun;Oh, Byeong-Sam;Choei, Nae-Young
    • Land and Housing Review
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    • v.12 no.4
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    • pp.81-92
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    • 2021
  • This study investigates whether urban expansion can act as a cause of the decline of the original city center through the Space Syntax methodology. The urban spatial structure analysis was conducted targeting the downtown area of Jeju-eupseong. The time points for longitudinal analysis were set at five points between 1914 and 2021 including the Japanese colonial period when the cadastral map was drawn up in Jeju City, and the urban spatial structure was analyzed and compared for each time point. ASA (Angular Segment Analysis) was used as a technique for urban spatial structure analysis. This study shows that urban expansion is a cause of the decline of the original downtown. The original city center has moved away from the center as the urban structural change due to the urban expansion. The urban structure of the eastern part of Jeju City has undergone a major transformation between 1914 and 2021. As the old Jeju area where the original city center was located is geographically in contact with the sea, urban sprawl has been made toward Halla Mountain and further to the south of Jeju. Accordingly, the city center has transformed from a monocentric to a polycentric structure. Due to the dynamics of the urban sprawl, the old downtown of Jeju became one of the peripheral neighbourhoods in the Greater Metropolitan of Jeju.

Spatial Relations of the Urban Expansion Intensity and Flooded Buildings (도시확장강도와 건물침수의 공간적 관계성)

  • Kang, Sang Jun;Kwon, Tae Jung
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.37 no.4
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    • pp.759-764
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    • 2017
  • The paper is intended to explore the spatial relations between flooded buildings and urban expansion phenomena by employing urban expansion intensity index and hotspot analysis methods for the case of Gangneung. Two major results are as followed; first, flooding susceptible areas are found in the regions where the highly intense development occurs within a short period of time, so called pseudo-urbanization. Second, less flooded buildings exist in old towns where it is believed that there is the lack of urban infrastructure services. This study indicates the possibility that the highly intense development and pseudo-urbanization with a relatively short time period relate to flooded building events. In addition, the possibility leads to another issue that new developments might be increasing the flooding vulnerability worse than before, particularly, to the adjacent old towns. For the better understanding, it is desirable to have further related case studies in the near future.

A Study on the Influences of Urban Area Expansion by Developing a Large Scale Residential District on Changes of Urban Spatial Structure - In the Daejeon Metropolitan City - (대규모 택지개발에 의한 도시확장이 도시 공간구조변화에 미치는 영향분석 - 대전광역시를 대상으로 -)

  • Jeong, Young-Hwan;Kang, In-Ho
    • Journal of the Korean housing association
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    • v.17 no.5
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    • pp.137-146
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    • 2006
  • This study was aimed to analyze the influences of urban expansion by developing a new large scale residential district on changes of whole urban spatial structure. For the analysis, time serial analysis was conducted on the Daejeon Metropolitan City by using the space syntax method. The results of the study are as follows ; First, an expansion of urban area led to lower both of the local and global integration levels, second, the spatial occupation ratio of upper 10% in the whole integration showed that old city center was separated, and moved to the Dunsan District, third, the results also showed that an integration of the old city center region maintained a high level in spite of a movement of city center and its local integration still had highest level so that the old city center will take one of the two city center roles together with Dunsan District.

Spatio-temporal change detection of land-use and urbanization in rural areas using GIS and RS - Case studies of Yongin and Anseong regions - (GIS와 RS를 이용한 농촌지역 토지이용 및 도시화 변화현상의 시공간 탐색 - 용인 및 안성지역을 중심으로 -)

  • Gao, Yujie;Kim, Dae-Sik
    • Korean Journal of Agricultural Science
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    • v.38 no.1
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    • pp.153-162
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    • 2011
  • This study analyzed the spatio-temporal change detection of land-use and urbanization in Yongin and Anseong regions, Kyunggi Province, using three Landsat-5 TM images for 1990, 1996, and 2000. Remote sensing (RS) and geographic information system (GIS) techniques were used for image classification and result analysis. Six land-use types were classified using supervised maximum likelihood classification. In the two study areas, the land-use changed significantly, especially the decrease of arable land and forest and increase of built-up area. Spatially, the urban expansion of Yongin region showed a spreading trend mainly along the national road and expressways. But in Anseong region the expansion showed 'urban sprawl phenomenon' with irregular shape like starfish. Temporally, the urban expansion showed disparity - the growth rates of urbanized area rose from the period 1990-1996 to 1996-2000 in both study areas. The increased built-up areas were converted mainly from paddy, dry vegetation, and forest.

Analysis of Window Thermal Performance according to Guidelines on the Balcony Expansion Costs (발코니 확장비용 가이드라인에 따른 창호 열성능 분석)

  • Choi, Gyoung-Seok;Kang, Jae-Sik;Lee, Seung-Eon
    • Proceedings of the SAREK Conference
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    • 2008.06a
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    • pp.863-868
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    • 2008
  • In accordance with the guidelines on the balcony structure changes in December 2005, most of tenants were moving into apartment housing, expand the balcony, but some large deviation between the price construction costs set of cases, due to overuse and the cause of the dispute, and the housing law amended in 2007 due to price cap system is implemented, the cost of expansion the balcony overdose pointed out that there is set to boost the sale price has been raised. These issues in order to improve the government in January 2008, the "Note costs by the balcony expansion" suggested guidelines to protect the rights of tenants and wants to promote the settlement of the sale price cap system. This study calculated the "Note costs by the balcony expansion" window system based on double or single, high performance insulation window system of the quantitative performance analysis of each type window that purpose.

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Conflicts and Resolutions due to the Expansion of Urban Heritage - Focusing on Historic Sites and Hanok Areas in Seoul -

  • Hyun Chul Youn;Seong Lyong Ryoo
    • Architectural research
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    • v.25 no.2
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    • pp.29-40
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    • 2023
  • The purpose of this study is to analyze the conflicts caused by the spatial expansion in two types of urban heritage in Seoul. To explain the national and professional orientation found in each spatial transformation, the study brought the concept of 'historic state' and 'epitome,' thereby examining the operating system of the conflicts. Field observations and stakeholder interviews were performed based on literature and historical research. The study results are as follows. ①In the case of Gwanghwamun and Donuimun, the spatial expansion is to find the historic state of the sites. Gwanghwamun with high national status and substance, conflicts show a pattern that spreads to memory conflicts. Donuimun is relatively unknown and has no substance so that a flexible method of digital restoration was applied. ② In the case of Ikseon-dong and Bukchon hanok, they show heterogeneous spatial expansion. The conflicts in relation to this is caused by the epitome of hanok. In Ikseon-dong, illegal installation of structures(non-epitome) is prevalent, while in Bukchon, there was a process of transferring the new basement(non-epitome) as part of the hanok. ③Conflicts in Gwanghwamun can be coordinated by referring to the digital restoration of Donuimun, and conflicts in Ikseon-dong can be resolved by taking Bukchon as a precedent.

Comparative Analysis of the Storm Sewer Expansion Methodology and Underground Rainwater Storage Tanks for Urban Flood Control (기존 도시의 홍수저감을 위한 우수관거 배수용량 증대 및 지하 빗물저류조 설치효과 비교 분석)

  • Lee, Ho Yeol;Seo, Gyu Tae;Lee, Taek Soon
    • Journal of Korean Society on Water Environment
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    • v.29 no.6
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    • pp.754-761
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    • 2013
  • Urban floods are usually caused by the lack of drainage capacity. Hence, sewer capacity expansion methodology by replacing small pipes with bigger ones is primarily applied as a flood control measure. However, this approach is often unreasonable because of the costs and time involved. Thus, the installation of underground rainwater storage tanks with the two advantages of flood control and water conservation is proposed. This study compared the effectiveness of flood control by both the sewer expansion methodology and rainwater storage tanks using the Storm Water Management Model. Three cases were simulated in this study. The first case analyzed flood reduction by the storm sewer expansion methodology. The simulation results indicate that the overflow volume from manholes was reduced by 49% with this methodology. The second case analyzed flood reduction by installation of rainwater storage tanks. The simulation results indicate that the overflow volume was reduced by 62%. However, these two cases could not prevent urban floods completely. Hence, the third case analyzed the joint application of the storm sewer expansion methodology and rainwater storage tanks. In this simulation, flooding did not occur. Consequently, the results of this study clearly show that underground rainwater storage tanks are more effective for flood control than capacity expansion of storm sewer. Furthermore, the joint application of these two flood control measures is more effective than their separate application.

Analysis of Changes in Forest According to Urban Expansion Pattern and Morphological Features - Focused on Seoul and Daegu - (도시의 공간 확장 및 형태적 특징에 따른 산림녹지의 변화 분석 - 서울, 대구를 중심으로 -)

  • Ryu, Jieun;Hwang, Jinhoo;Lee, Junhee;Chung, Hye-In;Lee, Kyung-il;Choi, Yu-Young;Zhu, Yongyan;Sung, Min-Jun;Jang, Raeik;Sung, Hyun-Chan;Jeon, Seongwoo;Kang, Jin-Yung
    • Korean Journal of Remote Sensing
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    • v.33 no.5_3
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    • pp.835-854
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    • 2017
  • Government regulations and policies are important means of restraining the indiscreet expansion of urban areas. According to the standards from those means, it is clear that the fluctuation of forest green proportion encroached by the increase of urban space is obvious. In this study, we interpreted the changes of urban areas as well as the green ones owing to the urban expansion by the decades from 1996, with focusing on the cities of Seoul and Daegu highly developed in South Korea. The purpose of this study is to analyze the spatial expansion and morphological characteristics of urban land cover using not only satellite imageries (1996, 2006, 2016). but also the urban expansion intensity index (UEII) and GUIDOS program. Ultimately, this study is to compare the changes in the rate of forests due to urban expansions annually analyzed based on areas of forest elevation, slope, and the area of single forest patch. In Seoul, the expansion begun from urban space to suburban areas was comparatively rapid, which led the forest fragmentation and the gradual decline of the single patch. However, when it comes to DEM (Digital elevation model) and slope above a certain standard, by the development regulations, there was little decrease in area by anthropogenic developments. The city of Daegu has increased at a slow speed since 1996 in urban and suburban areas, whereas green forests have greatly increased through green forest conservation campaigns. In this way, as to the government policies and regulations, the quantitative and morphological expansion of cities owing to development could be controlled and forest spaces could be preserved as well. Therefore, regulations and policies by the government should be appropriately utilized for sustainable cities.