• Title/Summary/Keyword: 방재정보

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Applicability of Multi-Temporal MODIS Images for Drought Assessment in South Korea (봄 가뭄 평가를 위한 다중시기 MODIS 영상의 적용성 분석)

  • Park, Jung-Sool;Kim, Kyung-Tak;Lee, Jin-Hee;Lee, Kyu-Sung
    • Journal of the Korean Association of Geographic Information Studies
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    • v.9 no.4
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    • pp.176-192
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    • 2006
  • The need for a systematic drought management has increased since last countrywide drought in 2001. Naturally various studies for establishing drought plan and preventing drought disaster have been conducted. MODIS image provided by Terra satellite has effective spatial and temporal resolutions to observe spatial and temporal characteristics of a region. MODIS data products are easy for preprocessing and correcting geometrically and provide various data set in regular which are applicable for drought monitoring. In this study, Ansung river and the upstream of South Han river basin was chosen for case study to identify and assess spring drought. The multi-period MODIS image and accumulated precipitation were used to detect not only the drought year but also the vegetation change of normal year and the result were compared with various spatial data. The result shows NDVI and LSWI with is more appropriate than LST for assesing spring drought in Korea and two month cumulative precipitation has moderate relationship with drought. It is necessary to use MODIS image which has same period and same space for effective drought analysis because drought is also affected by landover and altitude.

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Application of Flood Prevention Measures Using Detailed Topographic Data of River and Lowland (하천-제내지의 상세 지형자료를 이용한 수해방지대책 적용)

  • LEE, Jae-Yeong;HAN, Kun-Yeun;KEUM, Ho-Jun;KO, Hyun-Soo
    • Journal of the Korean Association of Geographic Information Studies
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    • v.23 no.1
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    • pp.15-29
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    • 2020
  • Recently, the incidence of flooding in Korea has decreased by the measures by central and local governments, however the scale of damage is increasing due to the improvement of living standard. One of the causes of such flood damage is natural causes such as rainfall exceeding the planned frequency of flood control under climate change. In addition, there are artificial causes such as encroachment of river spaces and management problems in upstream basins without consideration of downstream damage potential by regional development flood. In this study, in order to reduce the inundation damage caused by flooding of river, the situation at the time of inundation damage was reproduced by the detailed topographic data and 2D numerical model. Therefore, the effect of preparing various disaster prevention measures for the lowland was simulated in advance so that quantitative evaluation could be achieved. The target area is Taehwa river basin, where flooding was caused by the flooding of river waters caused by typhoon Chaba in October 2016. As a result of rainfall-discharge and two-dimensional analysis, the simulation results agree with the observed in terms of flood depth, flood arrival time and flooded area. This study examined the applicability of hydraulic analysis on river using two-dimensional inundation model, by applying detailed topographic data and it is expected to contribute to establish of disaster prevention measures.

The Method for Transforming the Shape File in ESRI into the Oracle Spatial DB for the Spatial DB Construction of the Drainage System (하수관거 공간DB 구축을 위한 ESRI 공간 파일의 오라클 공간DB 자동 변환 기법)

  • Kim, Ki-Uk;Hwang, Hyun-Suk;Kim, Chang-Soo
    • Journal of Korea Multimedia Society
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    • v.12 no.7
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    • pp.989-996
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    • 2009
  • Recently, use of the GIS (Geographic Information System) for the disaster of the urban inundation is increasing. The digital disaster map is the system which analyzes the occurrence area of inundation in the past and forecasts the flood areas by the hydrology method. The development of the system which simulates the flood forecast area by the SWMM(Storm Water Management System) and hydrology method and displays the danger areas is required for the construction of the inundation forecast system. And the spatial database which contains information of the urban facilities such as the street and building and the sewer system such as the manhole and drainage and the result of the hydrology analysis is constructed. In this paper, we propose the method for transforming the Shape File in ESRI into the Oracle spatial database to construct the spatial data for the drainage systems and urban facilities using the Shape File format in the ESRI. We suggest the algorithm for the transformation of the data format, and develop the prototype system to display the inundation area using the spatial database.

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Analysis on Inundation Impacts of Sea Level Rise Using System Dynamics-GIS Model (System Dynamics-GIS 모델을 이용한 해수면 상승 침수 영향 분석)

  • KIM, Ji-Sook;KIM, Ho-Yong;LEE, Sung-Ho
    • Journal of the Korean Association of Geographic Information Studies
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    • v.18 no.2
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    • pp.92-104
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    • 2015
  • In order to analyze the impacts of climate change, a time and space integrated model was developed in this study using system dynamics and GIS. The model built was used to carry out a simulation on the inundation impact on A-gu of Busan Metropolitan city resulting from the sea level rise scenario of IPCC and storm surge, which is the worst case. Through this, the flooded area and population until 2100 were predicted. Also, the result and significance of each alternative was reviewed improving the model by establishing alternative scenarios of protection, accommodation and retreat as plans of reaction to sea level rise. The combination of system dynamics and GIS has advantages of how the diverse variables change until the target year can be traced and, accordingly, not only the results but also the processes of spatial change can be examined by calculating the value of change process at each time step. The synergy of this model presumed to be a foothold for solving problems which are becoming difficult to predict due to increase in uncertainty and complexity such as the support for decision making for urban resilience to natural disasters.

Development on Prediction Algorithm of Sediment Discharge by Debris Flow for Decision of Location and Scale of the Check Dam (사방댐 위치 및 규모 결정을 위한 토석류 토사유출량 예측 알고리즘 개발)

  • Kim, Kidae;Woo, Choongshik;Lee, Changwoo;Seo, Junpyo;Kang, Minjeng
    • Journal of the Society of Disaster Information
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    • v.16 no.3
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    • pp.586-593
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    • 2020
  • Purpose: This study aims to develop an algorithm for predicting sediment discharge by debris flow, and develop GIS-based decision support system for optimal arrangement of check dam. Method: The average stream width and flow length were used to predict the cumulative sediment discharge by debris flow. At this time, the amount of slope failure on source area and average flow length were utilized as input factors. Result: The predicted sediment discharge calculated through the algorithm was 1.1 times different on average compared to the actual sediment discharge by debris flow. In addition, the program is an objective indicator that selects the location and size of the check dam, and it can help practitioners make rational decisions. Conclusion: The soil erosion control works are being implemented every year. Therefore, it is expected that the GIS-based decision support system for location and size of the check dam will contribute to the prevention of sediment-related disasters.

Appropriateness of Location of Nuclear Accident Evacuation Shelters based on Population Characteristics and Accessibility -The Case of Busan Gijang-gun, Geumjeong-gu and Haeundae-gu in Korea- (인구특성과 접근성을 고려한 방사능재난 대피시설 입지 적정성 분석 -부산광역시 기장군, 금정구, 해운대구를 대상으로-)

  • DONG, Ah-Hyeon;LEE, Sang-Hyeok;KANG, Jung-Eun
    • Journal of the Korean Association of Geographic Information Studies
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    • v.22 no.4
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    • pp.131-145
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    • 2019
  • Korea has set up a radiation emergency planning zone based on the 「Act on Physical Protection and Radiological Emergency」 to protect residents living near nuclear power plants in the event of nuclear disasters. Little research has been conducted on the appropriateness of existing nuclear evacuation facilities because of a general lack of interest in nuclear accidents. This research addresses this gap by analyzing the location adequacy of evacuation facilities in Busan's emergency protection planning area based on vulnerable populations and accessibility analyses. The Gijang-gun which has the greatest risk, shows that only 4.05% of the total urban area was included in the evacuation service area within 5 minutes while only 36.93% of Geumjeong-gu and 37.23% of Haeundae-gu were included in the evacuation-enabled area. In addition, evaluation facilities in the elderly population hotspots were lacking, and there was a wide gap between dongs within the same Gu. Thus, additional evacuation facilities need to be designated and installed considering the spatial equity between areas and safety of both the public and vulnerable populations.

Mapping Technique for Flood Vulnerable Area Using Surface Runoff Mechanism (지표유출메커니즘을 활용한 홍수취약지구 표출 기법)

  • LEE, Jae-Yeong;HAN, Kun-Yeun;KIM, Hyun-Il
    • Journal of the Korean Association of Geographic Information Studies
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    • v.22 no.4
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    • pp.181-196
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    • 2019
  • Floods can be caused by a variety of factors, and the main cause of floods is the exceeding of urban drainage system or river capacity. In addition, rainfall frequently occurs that causes large watershed runoff. Since the existing methodology of preparing for flood risk map is based on hydraulic and hydrological modeling, it is difficult to analyse for a large area because it takes a long time due to the extensive data collection and complex analysis process. In order to overcome this problem, this study proposes a methodology of mapping for flood vulnerable area that considered the surface runoff mechanism. This makes it possible to reduce the time and effort required to estimate flood vulnerabilities and enable detailed analysis of large areas. The target area is Seoul, and it was confirmed that flood damage is likely to occur near selected vulnerable areas by verifying using 2×2 confusion matrix and ROC curve. By selecting and prioritizing flood vulnerable areas through the surface runoff mechanism proposed in this study, the establishment of systematic disaster prevention measures and efficient budget allocation will be possible.

Protocol Design for Fire Receiver­based Fire Detection Robots (화재수신기 기반의 화재감시로봇을 위한 프로토콜 설계)

  • Lim, Jong-Cheon;Lee, Jae-Min
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.11 no.4
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    • pp.452-459
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    • 2018
  • Conventional fire fighting robots are controlled by a remote control to monitor the fire scene or to suppress the fire. However, this method has a problem that it takes a long time to prepare robot and input it to fire place in the golden time after the fire, so that it can not sufficiently serve as a fire fighting robot. Using the autonomous driving fire monitoring robot, when a fire signal is generated, in conjunction with a fire receiver a moving robot takes a video of the fire scene and delivers the image to the fire department, so that the fire fighter can decide if it is real fire or not. Thereby it is possible to prevent a sudden spread of an accident by providing a quick judgment opportunity and at the same time suppressing the fire early. In this paper, we propose an architecture of the autonomous mobile fire monitoring robot and the communication protocol required for the robot to work with the fire receiver. A communication protocol is designed to control multiple fire monitoring robots in real time, and a communication with a fire receiver is designed as a hierarchical network to serve as an interface of an Ethernet network using wireless Wi-Fi. The fire monitoring robot and the wireless communication of the fire receiving period are implemented and the effectiveness of the operation is confirmed through the field test.

Development of U-Service Priority Model Based on Customer and Provider's View (수요·공급자를 통합한 u-서비스 우선순위 평가모형 개발)

  • Jang, Jae-Ho;Um, Jung-Sup
    • Journal of the Korean Association of Geographic Information Studies
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    • v.11 no.2
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    • pp.132-147
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    • 2008
  • So far ubiquitous service (u-service) priority has seldom been empirically examined based on the customer's view. It is usual to prioritize the relative importance of u-service variables by the supplier's intuition and a few specialist's experienced knowledge. Such approaches have the disadvantage that they provide only limited empirical information on the field practices in relation to u-service since customer demand of u-service is poorly defined despite abundant interest in this problem. Therefore, the aim of this research was to develop u-service priority model in the context of multi-criteria framework integrating customer and supplier's view, using high technology acceptance theory as major controlling factors. An important question was how to measure or represent criteria that is important to u-service and should be included in a priority model. The selection criteria for the model variables were derived from high technology acceptance theory and AHP approach through the analysis of frequency count, elimination of overlapping factors and brainstorming with specialists. Daegu showed top-rankings in transportation-aid service, guidance service for the eyesight disabled and u-telematics service. In contrast, disaster prevention service and industrial specialized town service ranked highly in the typical supplier's approach were not a dominant determining factor in the u-service priority. The model identified the fact that typical high priority service in terms of supplier's view did not necessarily accompany the important predictor for the u-service priority.

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A Study on the Management Improvement of Disaster Recovery Resources of Municipality with Field Survey (현장실태조사를 활용한 지자체 재난관리자원 관리 개선 연구)

  • Kim, Joon-Ha;Kim, Tae-Heon;Jung, Jae-Wook
    • Journal of the Society of Disaster Information
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    • v.16 no.1
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    • pp.155-162
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    • 2020
  • Purpose: The purpose of study was to identify problems in disaster recovery resource management and operation through on-site investigation and utilize them as improvement proposal for disaster recovery resources management by local governments. Method: Areas with high natural and social disasters recorded in historical and yearly records of natural and social disasters, related books, and annual reports for 20 years were selected. The DRSS data of the selected local governments were analyzed and the reserve warehouse were selected for field survey. Result: It is analyzed that the current situation in the city hall and district offices is somewhat insufficient due to heavy work by the working-level officials of local governments on the storage of disaster recovery resources. The actual amount of stockpiles and DRSS data are somewhat different or missing because the input method and criteria are not clear at present when inputting the current data. Conclusion: To improve the management of the disaster recovery resource reserve, it is deemed that education of DRSS and training of best practices for the operation of disaster management resources are urgently needed, and that a systematic management of stockpiles using disaster prevention experts will be required.