• Title/Summary/Keyword: Urbanization

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Runoff Characteristics by Urbanization in the Mushim Stream Watershed using HEC-BMS (HEC-HMS를 활용한 무심천 유역내 도시화에 의한 유출 특성)

  • Yoon, Seok-Hwan;Lee, Jong-Hyeong
    • Journal of The Korean Society of Agricultural Engineers
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    • v.46 no.3
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    • pp.43-54
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    • 2004
  • For a given watershed that consists of urbanized areas, it was essential to predict how the runoff characteristics, such as runoff peak and volume, and travel time, change with time far planning and designing various kinds of hydraulic facilities with given recurrence interval. In this study, Mushim stream watershed was simulated using HEC-HMS model to get runoff characteristics of an urbanization basin. The results was showed that runoff was increased $1794.20{\sim}2104.65\;m^{3}/s$> and $1751.90{\sim}1961.30\;m^{3}/s$ according to the increased of rainfall and CN value recurrence interval in years. Observed storm was increased $497.91{\sim}581.71\;m^{3}/s$ and $506.57{\sim}537.01\;m^{3}/s$ for increased of CN value and impervious area. This paper is also possible to evaluate the effect of urbanization quantitatively.

A Case Study of Urbanization of Yongin Community from 1970 to 2000 (농촌도시화의 역기능 연구 - 1970년부터 2000년까지 경기도 용인의 사례-)

  • Lim, Hyung-Baek;Cheong, Ji-Woong
    • Journal of Korean Society of Rural Planning
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    • v.6 no.2
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    • pp.34-42
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    • 2000
  • The Korea urbanization has been accelerated without regard to regional traits and the environment. Most of rural areas have been overurbanized with proper and long term plan. Especially the case of Yongin-community which is located 50km south of Seoul reveals a typical wrong urbanization policy. Evidence of such wrong policy is proved by this study for last three decades(1970-2000) in political economic approach with special reference to the Manuel Castells' theory. The study concludes that urbanization with no proper development plan is mostly vulnerable and wasteful. And the environment is once spoiled, it is almost impossible to recover, so it is necessary for us long term and proper plan before development.

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도시화에 따른 갑천유역의 지하 수문 특성 변화 분석

  • Kim Jeong-Gon;Son Gyeong-Ho;Go Ik-Hwan
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • pp.64-67
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    • 2006
  • The main purpose of this research was to investigate the effects of urbanization on the groundwater system in the Gap river basin, a sub-basin of the Geum river basin. In this analysis, we constructed a water cycle analysis system using SWAT. Then, changes in soil moisture and recharge rate due to land-use changes were investigated using different land-use data estimated in 1975 and 2000. Simulation results were analyzed for both draught (2001) and flood (2003) years to take into account different hydrologic conditions. It was shown that recharge rate in the most urbanized area (31% change) was reduced by 17% for both periods due to urbanization. The results also indicated that soil moisture decrease due to urbanization was more sensitive in the drought year (2001) than in the flood year (2003), We expect that the results of this research can contribute to providing useful information for managing urban rivers considering river restoration and flood control.

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Sustainable Development and New Urbanization: A Conceptual Consideration (지속가능한 발전과 새로운 도시화 - 개념적 고찰 -)

  • 최병두;홍인옥;강현수;안영진
    • Journal of the Korean Geographical Society
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    • v.39 no.1
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    • pp.70-87
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    • 2004
  • This paper is to conceptualize 'new urbanization' on the basis of a certain possibility of 'sustainable urbanization' in the capitalist society, while admitting some criticism on its possibility. For this purpose, first of all, this paper points out some economic and environmental difficulties in the Fordist regime of accumulation and the developmentalist strategies which have promoted the modem urbanization in the industrial society. Then, this paper examines the concept of 'sustainable development' which has been suggested to manage such problems in modem industrial cities, and explores its limitation that the application of this concept has been usually confined to some ex post facto - that is, weak sustainable development - strategies to resolve urban environmental problems. Finally, in order to overcome these problems both of developmentalism and of weak sustainable development, this paper conceptualize strong sustainable development for new urbanization and suggest urban environmental strategies for strong sustainable cities.

A Comparison of the Impact of Regional Anthropogenic Climatic Change in Urban and Rural Areas in South Korea (1955-2016) (최근 60년간 도시 및 농촌 지역의 국지적 기후변화 비교 분석)

  • Yoon, Dong-Hyun;Nam, Won-Ho;Hong, Eun-Mi;Kim, Taegon;Ho, Chang-Hoi;Hayes, Michael J.
    • Journal of The Korean Society of Agricultural Engineers
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    • v.60 no.3
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    • pp.37-50
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    • 2018
  • Local climate characteristics for both urban and rural areas can be attributed to multiple factors. Two factors affecting these characteristics include: 1) greenhouse gases related to global warming, and 2) urban heat island (UHI) effects caused by changes in surface land use and energy balances related to rapid urbanization. Because of the unique hydrological and climatological characteristics of cities compared with rural and forested areas, distinguishing the impacts of global warming urbanization is important. In this study, we analyzed anthropogenic climatic changes caused by rapid urbanization. Weather elements (maximum temperature, minimum temperature, and precipitation) over the last 60 years (1955-2016) are compared in urban areas (Seoul, Incheon, Pohang, Daegu, Jeonju, Ulsan, Gwangju, Busan) and rural/forested areas (Gangneung, Chupungnyeong, Mokpo, and Yeosu). Temperature differences between these areas reveal the effects of urbanization and global warming. The findings of this study can be used to analyze and forecast the impacts of climate change and urbanization in other urban and non-urban areas.

Urbanization Effects on Reference Evapotranspiration (도시화에 따른 수문기후변화 II (도시화가 기준 증발산량에 미치는 영향))

  • Rim, Chang-Soo
    • Journal of Korea Water Resources Association
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    • v.40 no.7
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    • pp.571-583
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    • 2007
  • The effects of climatic changes owing to urbanization, geographical and topographical conditions on Penman-Monteith reference evapotranspiration, and energy and aerodynamic terms of Penman-Monteith reference evapotranspiration have been studied. In this study, 56 climatological stations including the Seoul metropolis in South Korea have been selected, and the area of study site was set at $314\;km^2$. The climatological station is centrally located In the study area with a 10 km radius. The geographical and topographical characteristics of these sites were examined using GIS analysis. Land use status of the study area was also examined to estimate the extent of urbanization. The study results indicated that the variation of reference evapotranspiration rate is closely related to urbanization in most climatological stations. The level of change in reference evapotranspiration was higher in areas with higher urbanization rates. The change in reference evapotranspiration appears to be caused by temperature rises following heat island phenomena due to urbanization, and by the decrease in humidity, wind speed and sunshine duration due to the Increase in residential areas in urban districts. Especially, the humidity decrease causes a significant decrease in evapotranspiration rate. The study results showed that climatic change due to urbanization and proximity to the coast had the greatest effect on reference evapotranspiration.

A Study on the China Urbanization Policies in Jingjingi Region and the Planning Characters for New City Center Design - Focused on the New City Center Development Projects in Rural Area near the Periphery of Metropolitan - (중국 징진지 지역의 도시화 정책과 계획특징 연구 - 수도권 주변 농촌 지역의 신도시 개발계획안을 중심으로 -)

  • Kim, Juntaek;Chung, Kumho
    • Journal of the Korean Institute of Rural Architecture
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    • v.22 no.2
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    • pp.35-42
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    • 2020
  • The new urbanization is one of prestige growth engines to lead the next generation of China economy, it promotes new sustainable urban development models guided by various planning polices to improve urban livability and sustainability in accommodation with economy, social, and environmental consideration. The expanding urban periphery to rural area should leverages existing assets, infrastructure, local context and plans as a showcase of environmental and economic balance in a responsibly high-density, green community designed to human development and ecological settlement. The Beijing Chaoyang District and Tianjin Binhai area are a strategic advancement in the policy of building one of the most powerful economic regions, the Bohai Rim. Recently released 'Jingjinji development plan' supports various urbanization policies and encourages sustainable developments including 2 significant city center projects which are under way in global attention. The study compared on the characters of development policies and the cutting-edge smart design strategies by which they are applied, the master plan of the Beijing Chaoyang District expansion plan and Tianjin Yujiapu CBD project embrace innovative sustainable technologies.

A Study on the Design Types of Sustainable Public Spaces upon Urbanization (도시화에 따른 공공공간의 지속가능한 디자인 유형에 관한 연구)

  • Back, Seong-Kyung;Kim, Joo-Yun;Lee, Seung-Hun
    • Korean Institute of Interior Design Journal
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    • v.18 no.6
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    • pp.158-165
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    • 2009
  • Ever since the industrial revolution, large cities have become a field of new lifestyle and urbanization, causing climate change and environmental pollution. As a result, countermeasures for revolving these problems is needed. In addition, large cities in the information age have become a space where each nation executes its public policy to express the competitiveness of each city. In this study, countermeasures for the environmental crises caused by urbanization as well as the sustainable spatial designs for the cities are investigated as a new source of urban competitiveness, and the environmental aesthetics for designing public space is considered. The purpose of this study is to suggest a direction for sustainable designs and planning that is applicable to public space. According to the definition of sustainability, the items of the spatial implementation of ecological, economical and social sustainability are categorized. Based on this categorization, the sustainable designs of public space are classified into five types, and a comprehensive analysis of good public spaces from previous literature is conducted. The concepts of design and three elements--public space, sustainability, and their instrumental meanings, are integrated in this study. The significance of this study lies in the actual application of the classification to the planning and design of sustainable public space in cities, rather than being a conceptual classification.

Assessment of Hydrological Impact by Long-Term Land Cover Changes due to Urbanization of Rural Area (농촌유역의 도시화 진전에 따른 수문환경 변화)

  • Lee, Mi-Seon;Park, Geun-Ae;Kwon, Hyung-Joong;Kim, Seong-Joon
    • Journal of Korean Society of Rural Planning
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    • v.11 no.1
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    • pp.17-24
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    • 2005
  • The purpose of this study is to evaluate the hydrological impact due to temporal land cover change by gradual urbanization of Anseong-cheon Gongdo watershed ($371.8km^2$). Land covers of 1981, 1990, 2000 Landsat TM images were classified by maximum likelihood method. The watershed showed a trend that forest & paddy areas decreased about $33km^2$ and $27km^2$, respectively and urban area increased about $11km^2$ during the periods. To identify the impact of streamflow due to urbanization, WMS HEC-1 was used. According to apply Huffs quartile storm events by changing land cover data, peak runoff discharge of each frequency rainfall (50, 100, 500 years) increased about 56, 36, $192m^3/sec$, respectively.