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  • Title/Summary/Keyword: Land-use Factors

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Categorize Debris Flow Hazard Zones in Urban Areas: The Case of Seoul (도시지역 토사재해 위험지역의 유형화: 서울시를 사례로)

  • Park, Changyeol;Shin, Sang Young
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.36 no.5
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    • pp.915-926
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    • 2016
  • The purpose of this study is to classify debris flow hazard zones in urbanized areas using multivariate statistical analyses and to suggest customized management strategies to each areal type. Using field survey data set in Seoul, 49 sample debris hazard zones are selected. Clustering and discriminant analyses show that debris flow hazard zones are classified into two types. Surrounding land use and land slope are major factors influencing to the categorization. The results suggest that, by considering the characteristics of each areal type, more customized management strategies for debris flow hazard are necessary. Particularly, in addition to traditional structural measures, non-structural measures including land use and development control for downstream built-up areas should be emphasized in urbanized areas to mitigate human and property damages from debris flow hazard more fundamentally.

A Study on Changes of Land Use in the Local Port City - Focused on Yeosu in Jeonnam Province - (지방 항구도시의 토지이용 변화에 관한 연구 - 전라남도 여수시를 중심으로 -)

  • Chung, Kumho
    • Journal of the Korean Institute of Rural Architecture
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    • v.25 no.1
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    • pp.9-16
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    • 2023
  • This study is on the formation and the development process of urban space by referring to the literature in Yeosu where is the important location in logistics & transportation and maritime since the Japanese colonial period. There are many factors and results of the development process in Yeosu by the opening port, railroads, loads and industries. The purpose of this study is to understand the characteristics of the formation process of urban space and the characteristics of physical space in Yeosu. The results are as follow; The urban formation and development process in Yeosu where was a small fishing village in the 1910s is largely divided into four processes. Formation: the population increased due to constructions such as of a railroad, a port, and roads and there were many reclamations around the center of the old city center in the Japanese colonial period. Stagnation: There was no urban development due to stagnation, war, and the Yeo-sun Incident. Expand: the industrialization of the Yeocheon Industrial Complex and Gwangyang Steel and other areas around Yeosu led to a surge in Yeosu's population. To cope with this, the city was expanded through three land readjustment projects and the development of large-scale residential complexes. Decline and Remodeling: Yeosu's urban space declined due to the decline of fisheries and the decrease in marine and railway logistics. And the expansion and improvement of the transportation network for hosting the Yeosu World Expo increased the accessibility of the old city center, transforming it into a tourist city using cultural heritage and nature.

Environmental Factors Influencing on the Occurrence of Pine Wilt Disease in Korea (우리나라에서 소나무재선충병 초기 발생지의 환경 특성 분석)

  • Lee, Dae-Seong;Nam, Youngwoo;Choi, Won Il;Park, Young-Seuk
    • Korean Journal of Ecology and Environment
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    • v.50 no.4
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    • pp.374-380
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    • 2017
  • Pine wilt disease (PWD) is one of the hazardous pine tree diseases in whole world. In Korea, PWD has been spreading since it was first observed in Busan in 1988. Dispersion of PWD is mainly mediated by its vectors such as Japanese pine sawyer. In this study, we characterized environmental condition including meteorological factors, geographical factors, and land use factors influencing on the occurrence of PWD. The occurrence data of PWD were collected at 153 sites where were the initial occurrence sites of PWD in local government regions such as city, Gun, or Gu scale. We used Akaike Information Criterion (AIC) to evaluate the relative importance of environmental variables on the discrimination of occurrence or absence of PWD. The results showed that altitude, slope, and distance to road were the most influential factors on the occurrence of PWD, followed by distance to building. Finally, our study presented that human activities highly influenced on the long term dispersal of PWD.

Assessment of geological hazards in landslide risk using the analysis process method

  • Peixi Guo;Seyyed Behnam Beheshti;Maryam Shokravi;Amir Behshad
    • Steel and Composite Structures
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    • v.47 no.4
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    • pp.451-454
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    • 2023
  • Landslides are one of the natural disasters that cause a lot of financial and human losses every year It will be all over the world. China, especially. The Mainland China can be divided into 12 zones, including 4 high susceptibility zones, 7 medium susceptibility zones and 1 low susceptibility zone, according to landslide proneness. Climate and physiography are always at risk of landslides. The purpose of this research is to prepare a landslide hazard map using the Hierarchical Analysis Process method. In the GIS environment, it is in a part of China watershed. In order to prepare a landslide hazard map, first with Field studies, a distribution map of landslides in the area and then a map of factors affecting landslides were prepared. In the next stage, the factors are prioritized using expert opinion and hierarchical analysis process and nine factors including height, slope, slope direction, geological units, land use, distance from Waterway, distance from the road, distance from the fault and rainfall map were selected as effective factors. Then Landslide risk zoning in the region was done using the hierarchical analysis process model. The results showed that the three factors of geological units, distance from the road and slope are the most important have had an effect on the occurrence of landslides in the region, while the two factors of fault and rainfall have the least effect The landslide occurred in the region.

Effect of rainfall events on soil carbon flux in mountain pastures

  • Jeong, Seok-Hee;Eom, Ji-Young;Lee, Jae-ho;Lee, Jae-Seok
    • Journal of Ecology and Environment
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    • v.41 no.11
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    • pp.302-309
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    • 2017
  • Background: Large-scale land-use change is being caused by various socioeconomic problems. Land-use change is necessarily accompanied by changes in the regional carbon balance in terrestrial ecosystems and affects climate change. Therefore, it is crucial to understand the correlation between environmental factors altered by land-use change and the carbon balance. To address this issue, we studied the characteristics of soil carbon flux and soil moisture content related to rainfall events in mountain pastures converted from deciduous forest in Korea. Results: The average soil moisture contents (SMC) during the study period were 23.1% in the soil respiration (SR) plot and 25.2% in the heterotrophic respiration (HR) plot. The average SMC was increased to 2.1 and 1.1% in the SR and HR plots after rainfall events, respectively. In addition, saturated water content was 29.36% in this grassland. The soil water content was saturated under the consistent rainfall of more than 5mmh1 rather than short-term heavy rainfall event. The average SR was increased to 28.4% after a rainfall event, but the average HR was decreased to 70. 1%. The correlation between soil carbon flux rates and rainfall was lower than other environmental factors. The correlation between SMC and soil carbon flux rates was low. However, HR exhibited a tendency to be decreased when SMC was 24.5%. In addition, the correlation between soil temperature and respiration rate was significant. Conclusions: In a mountain pasture ecosystem, rainfall induced the important change of soil moisture content related to respiration in soil. SR and HR were very sensitive to change of SMC in soil surface layer about 0-10-cm depth. SR was increased by elevation of SMC due to a rainfall event, and the result was assumed from maintaining moderate soil moisture content for respiration in microorganism and plant root. However, HR was decreased in long-time saturated condition of soil moisture content. Root has obviously contributed to high respiration in heavy rainfall, but it was affected to quick depression in respiration under low rainfall. The difference of SMC due to rainfall event was causative of a highly fluctuated soil respiration rate in the same soil temperature condition. Therefore, rainfall factor or SMC are to be considered in predicting the soil carbon flux of grassland ecosystems for future climate change.

Study on the Characteristics of Spatial Relationship between Heat Concentration and Heat-deepening Factors Using MODIS Based Heat Distribution Map (MODIS 기반의 열 분포도를 활용한 열 집중지역과 폭염 심화요인 간의 공간관계 특성 연구)

  • Kim, Boeun;Lee, Mihee;Lee, Dalgeun;Kim, Jinyoung
    • Korean Journal of Remote Sensing
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    • v.36 no.5_4
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    • pp.1153-1166
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    • 2020
  • The purpose of this study was to analyze the spatial correlation between the heat distribution map of the satellite imaging base and the factors that deepen the heat wave, and to explore the heat concentration area and the space where the risk of future heat wave may increase. The global Moran's I of population, land use, and buildings, which are the causes of heat concentration and heat wave deepening, is found to be high and concentrated in specific spaces. According to the analysis results of local Moran's I, heat concentration areas appeared mainly in large cities such as metropolitan and metropolitan areas, and forests were dominant in areas with relatively low temperatures. Areas with high population growth rates were distributed in the surrounding areas of Gyeonggi-do, Daejeon, and Busan, and the use of land and buildings were concentrated in the metropolitan area and large cities. Analysis by Bivarate Local Moran's I has shown that population growth is high in heat-intensive areas, and that artificial and urban building environments and land use take place. The results of this research can lead to the ranking of heat concentration areas and explore areas with environments where heat concentration is concentrated nationwide and deepens it, so ultimately it is considered to contribute to the establishment of preemptive measures to deal with extreme heat.

Study of Design Standard Establishment of Vehicle Rotation Area in the Dead-end Parking Lot (막다른주차장내 차량회전구간 설계기준 정립에 관한 연구)

  • Lim, Jae-Moon;Oh, Se-Kyung;Kim, Hoe-Kyoung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.12
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    • pp.7403-7415
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    • 2014
  • This study points out a problem that the vehicle rotation area provided in a dead-end parking lot for apartment blocks is misused as unreasonable parking places but accordingly, the edge parking spaces are rarely used for parking. Therefore, this study aims to establish a parking design standard to improve the parking convenience and land-use efficiency by investigating the real parking behaviors and problems identified in the study area, multiple apartment blocks in Haeundae-gu, Busan. This study calculated two simple linear regression models for two mutually exclusive factors, such as the parking convenience and land-use efficiency, respectively, and specified a trade-off point that optimizes both factors. The study results found that parking convenience and land-use efficiency can be improved by not only changing the misused vehicle rotation area to normal parking spaces depending on the usage pattern, but also by increasing the width of the edge parking spaces from 2.3m to 2.6m. Finally, this study suggests two parking design cases for more realistic design applications by considering the parking environment in the dead-end parking lot for apartment blocks.

An Empirical Analysis of Influencing Factors toward Public Transportation Demand Considering Land Use Type Seoul Subway Station Area in Seoul (토지이용유형별 서울시 역세권 대중교통 이용수요 영향인자 실증분석)

  • Oh, Young Taek;Kim, Tae Ho;Park, Je Jin;Rho, Jeong Hyun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.29 no.4D
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    • pp.467-472
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    • 2009
  • Even if Seoul City administration improved its public transportation service, transportation model share in seoul has not been increased. Subway user is also decreasing. Therefore, policy transition into TOD(Transit Oriented Development) should be applied in oder to enhance subway modal share. This paper develops a influencing model by using variables of transportation demand and supply. In addition, it provides major influencing factors for users in subway station area and level of transportation supply based on the analysis results. The results show that: first, cluster analysis presents that traffic pattern is proved to be different according to land use characteristics(residence, non-residence); second, main transportation variables such as transferring distance, the number of bus stop, the number of short distant bus lines, and the number of bicycle are more supplied in residential area compared to non-residential areas; third, the number of lines, bus dispatching interval, operating time, and distance between subway stations are more supplied in non-residential areas than residential areas. All in all, the results will be useful for providing priority of considerations in case of decision-making on public transportation policy in subway station area.

A Study on Compensation of Land according to the Spatial Properties -In case Compensation of Public Housing District- (공간정보 속성에 따른 토지보상액 결정에 관한 연구 -공공주택지구 보상사례를 중심으로-)

  • Moon, Jae-Hyeok;Lee, Myeong-Hun
    • The Journal of the Korea Contents Association
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    • v.16 no.11
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    • pp.188-198
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    • 2016
  • In order to supply the residential land for the promotion of public welfare, it must take a land of city suburb. That land have the difference in thinking is large for the determination of land prices to a variety of development pressure and land use regulations. In the process of executing a public project, the difference of these ideas has become a cause of conflict. Therefore, through objective study for the determination of land prices, to reduce the difference of ideas is going to be a clue of conflict resolution. This study selected the case area that is typical public district of many conflict, and then fix a compensation unit price like fair price as dependent variable. The selected variables through previous studies and expert consultation was an independent variable. To analyze the impact factors of land prices in the hedonic price model. The results were analyzed by distinguishing the group on the basis of the zoning and using, whether or not the site of the building in part that there is influence variable, the aspects of accessibility and regulation in part degree of influence variable came out different results for each group. It is analyzed that it reasonable results. Add selected site assimilation of the building that have not been presented in previous studies as a variable and which was applied at a rate to a variable of road have improved in more expliction of the influence of variables.

An Application of GIS Technique to Analyze the Location of Convenience Stores : The Case of Songpa Gu , Seoul (GIS 기법을 활용한 편의점의 입지분석에 관한 연구 - 서울시 송파구를 중심으로 -)

  • 이희연;홍의택
    • Spatial Information Research
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    • v.3 no.2
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    • pp.103-121
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    • 1995
  • The purpose of this study is to extract the main locational factors to affect the location of Convenience Stores (CVS) in Songpa Gu, Seoul by using Geographic Information Systems. The procedure of research has three steps. First, the spatial distribution of CVS in Korea is analyzed by the places and time. Second, the main locational factors to affect the location of CVS in Songpa Gu are extracted. Finally, the potential locational zones where are selected by extracted locational factors are compared with the actual distribution of CVS in Songpa Gu. The main locational factors to affect the location of CVS include factors of the numbers geocoding method in GIS, it can be idenified that the 58 stores are located in the potential locational zone. However, this study has limitation to extract potential locational zones in detail. There are still difficulties to collect appropriate data for land use buildings as well as data for consumer behavior and regional characteristics itself.

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