Greenbelt was designated by Korean government to prevent indiscreet urban sprawling for 14 large cities in 1971.
Importunate claims on deregulation of greenbelt system was continued in these days. But, ecological role of greenbelt as fundamental information for balanced decision making was not clarified sufficiently yet. In Ulsan metropolitan area, we clarified the roles of greenbelt system and prepared the sustainable management and improvement plans by analyzing ecological characteristics of vegetation established in Greenbelt and its surrounding area. Decrease of forest cover in greenbelt was lower than that of exterior and interior of greenbelt. Fragmentation patterns of forest cover corresponded with the pattern of forest cover. NDVI of greenbelt was higher than that of inner greenbelt and similar to that of exterior greenbelt. Surface temperature showed similar trend to that of NDVI. In consequence, greenbelt system has carried out well its primary roles. To mitigate negative effects from urbanization, we discussed management and improvement plans to promote ecological quality of greenbelt and urban landscape.
This study aims to examine the characteristics of traffic accidents involving elderly drivers with regards to the urban structure in Seoul, South Korea. To this end, this research analyzed the traffic accident data of the year 2015 collected by the Korean Police Agency and Koroad(TAAS). The traffic accident records being collected in a spatial unit, spatial heterogeneity and non-dispersion are prone to occur. In order to prevent this, this study employs ordinary least squares regression(OLS), a conventional spatial model for analyzing accident data, and geographically weighted regression(GWR), which is an alternative to the spatial econometrics model. It was revealed that the GWR model has a better goodness-of-fit than the OLS model. According to the GWR model, the population aged under 20 ratio and the industrial area ratio are negatively associated with traffic accidents in which elderly drivers are at fault. Meanwhile, employment density, commercial area ratio and the numbers of subway stations, bus stops, intersections, and traffic islands are positively associated with the traffic accidents involving elderly drivers.
Recently, the harbor has lost its original landscape of the coast and its port-space identity due to the scale expansion through landfill and uniform landscape planning. It also made it difficult for people to access. And the purpose of this study is to provide a standard of spatial size for the development of hydrophilic space of harbor and comfort and familiarity to users. According to the method proposed in the study, the size of the surrounding space was 40,000~150,000m2. In order to compare the spatial scale of the various natural villages, the result of the square conversion was 200~400m. This result is a length giving intimacy according to the theory of distance segmentation.
It is difficult to simply define the attributes of the space that can be familiar with it. However, in a sense of space where humans perceive space of a certain size as one space, it is judged that distance is directly related to the recognition of scale. Therefore, if the results of the study are utilized, it will be helpful to create a traditional port space considering human scale and create an attractive landscape.
Flood damages are continuously growing in urban areas due to the increase of impervious surfaces and the occurrence of extreme rainfalls caused by climate change. While traditional drainage systems are still effective in controlling stormwater runoffs, they are inefficient in terms of costs and performance since they are only used for stormwater management. Low impact development (LID) practices, a comprehensive soft-engineering approach, provides multiple benefits in diverse aspects, and has been recently adopted as a key concept for sustainable stormwater management in many countries. By using the LIDMOD3 modelling tool, the present study simulates the hydrologic performance of LID practices in three different scenarios and explores the cost effectiveness of LID measures compared to the conventional sewer pipeline infrastructures. A flood-prone area in Bupyeong borough, Incheon, South Korea, was selected as the study site. The findings show that the district’s total runoff volume and peak flow are reduced by 14-36% and 33-66%, respectively, in comparison with conditions without LID installation. Non-point source pollutant loads diminish by 15-36%, depending on the LID designed scenarios. Upon the consideration of construction costs, the results indicate that LID practices can be more efficient when they are partially developed rather than when various LID practices are applied to an entire area. The study concludes by suggesting policy implications as to how government agencies and local jurisdictions can more effectively adopt LID practices as part of sustainable stormwater management planning and link with future urban regeneration projects.
For national and local policies related to urban development and regeneration, welfare, culture and tourism, it is very important for river managers to designate and operate water-friendly river spaces in accordance with residents’ demands. Using mobile big data verified by the previous study (Lee, Lee and Choi 2019), this study aims to propose scientific ways to characterize water-friendly river spaces. First, it suggests clear criteria regarding how frequently a river space is visited by residents: river spaces are classified to five grades over the log-normal distribution in the number of visits per area. Second, it infers residents’ purposes to visit a river space: the purposes are characterized to five groups, which largely depends on whether a river space is used as a place for neighborhood-convenience facilities, or as one for culture and tourist facilities for regional revitalization. Third, this study suggests a step-wise method for determining water-friendly hub spaces deliberately using all results. This study concludes that river managers should apply more scientific ways to designate and operate water-friendly river spaces while monitoring residents’ visits closely with mobile big data.
This study developed and analyzed the age-friendly city index which is composed of objective indicators including physical environment considering the situation in Korea and identified and analyzed the age-friendly indexes of 7 cities in the metropolitan area. The results of this study are expected to help local governments prioritize age-friendly city policies. Although it is difficult to make a comprehensive comparison because of the geographical characteristics and the local environment, it is necessary to analyze the results of the indices in each region to find causes and remedies. In addition, after analyzing the current status of age-friendly policies in each region, there has been a comparative analysis with the current index and a diagnosis about the direction of the current progress. Of course, not all regions need to establish and implement the same age-friendly policies, but equal attention and efforts must be made in the 4 areas.
The aims of this study is to measure the concentration of the vulnerable groups and analyze the characteristics of the concentrated area using a spatial autocorrelation analysis. The study is focusing on the dwelling areas of vulnerable groups considering financial conditions. For this, the analysis targets were set as residents of private rental housing except those living in public rental housing in Seoul. The results showed that the spatial density of vulnerable groups was derived and shown to increase over time. In addition, the results of the spatial correlation is increasing between dense areas and deteriorated low-rise residential areas. Moreover, it was confirmed that the areas concentrated around the city center which are recognized as representative residences for vulnerable groups; these results show that both spatial polarization and economic polarization are occurring, which is an area of concern for our society.
In housing policy, it is necessary to supply rental housing that satisfies the local space needs of vulnerable groups.
Also, it is necessary to secure sufficient affordable housing for vulnerable groups because low-cost housing can be demolished as a result of the urban redevelopment project, so they can be concentrated in deteriorated areas. Although based on traditional theories, the segregation of residences is inevitable because of socioeconomic differences and the allocation of resources. However, if these trends prevail, they can accelerate regional imbalances and cause social conflicts, which will incur policy efforts at both the urban and spatial level.