• Title/Summary/Keyword: 산사태 위험도

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A Study on Numerical Analysis for Debris Flow considering the Application of Debris Flow Mitigation Facilities (토석류 저감시설 적용에 따른 토석류 수치해석에 관한 연구)

  • Bae Dong Kang;Jung Soo An;Kye Won Jun;Chang Deok Jang
    • Journal of Korean Society of Disaster and Security
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    • v.16 no.4
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    • pp.33-43
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    • 2023
  • The impact of prolonged rainfall, such as during the monsoon season or intense concentrated rainfall over a short period, can lead to mountainous disasters such as landslides and debris flows. These events, such as landslides and debris flows, cause both human and material damage, prompting the implementation of various measures and research to prevent them. In the context of researching debris flow disasters, numerical models for debris flows provide a relatively simple way to analyze the risk in a study area. However, since empirical equations are applied in these models, yielding different results and variations in input variables across models, the validation of numerical models becomes essential. In this study, a numerical model for debris flows was employed to compare and analyze the mitigation effects of facilities such as check dams and water channel work, aiming to reduce the damage caused by debris flows.

Characteristic Analysis and Prediction of Debris Flow-Prone Area at Daeryongsan (대룡산 토석류 특성 분석 및 위험지역 예측에 관한 연구)

  • CHOI, Young-Nam;LEE, Hyung-Ho;YOO, Nam-Jae
    • Journal of the Korean Association of Geographic Information Studies
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    • v.21 no.3
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    • pp.48-62
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    • 2018
  • In this study, landslide of debris flow occurred at 51 sites around Daeryounsan located in between Chuncheon-si and Hongcheon-gun during July in 2013 were investigated in field and behavior characteristics of debris flow were analyzed on the basis of records of rainfall and site investigation. According to debris flow types of channelized and hill slope, location and slope angle of initiation and deposit zone, and width and depth of erosion were investigated along entire runout of debris flow. DEM(Digital Elevation Model) of Daeryounsan was constructed with digital map of 1:5,000 scale. Land slide hazard was estimated using SINMAP(Stability INdex MAPping) and the predicted results were compared with field sites where debris flow occurred. As analyzed results, for hill slope type of debris flow, predicted sites were quite comparable to actual sites. On the other hand, for channelized type of debris flow, debris flow occurrence sites were predicted by using stability index associated with topographic wetness index. As analyzed results of 4 different conditions with the parameter T/R, Hydraulic transmissivity/Effective recharge rate, proposed by NRCS (Natual Resources Conservation Service), predicted results showed more or less different actual sites and the degree of hazard tended to increase with decrease of T/R value.

Development of the Monitoring System Model Based on USN for Landslide Detection Using Tilting Sensor (기울기 센서를 이용한 산사태 감지 USN 모니터링 시스템 모델 개발)

  • Kim, Jeong-Seop;Park, Young-Jik;Cheon, Dong-Jin;Jung, Do-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.8
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    • pp.3628-3633
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    • 2012
  • This paper proposes a model of the real time monitoring system based on Ubiquitous Sensor Network (USN) for the detection and prediction of landslides. For this purpose, the real time monitoring system with tilting sensor and USN was set up and the performance was conducted. The performance was accomplished by conducting both field examinations and the experimental evaluation of the monitoring system. The results of this study show that the angle $0^{\circ}$, $-10^{\circ}$, $-20^{\circ}$ and $0{\sim}-30^{\circ}$ of sensor position detected by the sensor module coincide with the data measured from USN monitoring system by giving a sampling time 100[msec]. Consequently, the proposed model of the real time monitoring system with tilting sensor based on USN will be widely used as a monitoring system in the exposure to dangerous landslide regions.

Development of Integrated Management System for Steep Slope Prevention and Management (급경사지 방재 및 관리를 위한 급경사지정보 통합관리시스템 개발)

  • Lee, Kyungchul;Jang, Yonggu;Song, Jihye;Kang, Injoon
    • Journal of the Korean GEO-environmental Society
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    • v.15 no.9
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    • pp.77-85
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    • 2014
  • Recently, the National Emergency Management Agency of Korea has been operating the National Disaster Management System. Nevertheless, there are numerous difficulties in systematic controlling the steep slope DB promptly, because the system's functions in input and control for steep slope information are merely simple. Futhermore, the hazard degrees of steep slope lands nowadays have risen suddenly in accordance with the increase rate of large scale landslides such as the landslide cases of Umyeonmountain, Chuncheon province and others or sever rain storm cases. these lead to rapid increases in frequencies of nature disasters nationally. therefore, it is needed to develop the GIS-based integrated management system for steep slope information in order to manage disasters in advance or high-degree control. This study shows the national GIS-based integrated management system to prevent the disasters that caused by steep slope lands. The integrated management system developed in this study consists of surface information input modules, realtime DB liaison modules of integrated underground information, V-world background map-based GIS, integrated management system for steep slope information user modules, realtime liaison interface modules designed for utilizing steep slope information. Also, tests about stability of data storage, system stability and consistency of processing speed were performed.

Construction and Utilization Plan of Steep Slope and Underground Spatial Information DB for Steep Slope Disaster Prevention (급경사지방재를 위한 급경사지정보 및 지하공간정보 DB 구축과 활용 방안 연구)

  • Lee, Kyungchul;Jang, Yonggu;Song, Jihye;Kang, Injoon
    • Journal of the Korean GEO-environmental Society
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    • v.15 no.7
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    • pp.13-21
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    • 2014
  • Recently, a great number of natural disasters have more frequently happened than the past. The National Emergency Management Agency of Korea has made preparation for the integrated management system of steep slope lands. There is information based on the steep slope inspection sheets and the underground spatial information related to the prevention against steep slope disasters. Nevertheless, building a complete DB System to prevent the hazards and secure the safeties should be urgently dealt with. It is mainly because the information of the National Disaster Management System is restricted to the text-based brief data. Therefore, the purpose of this study is to suggest the method as to building steep slope DB system for disaster prevention and maximizing the availabilities. This study shows the way of building a web-based DB system having its root in the steep slope inspection sheets. The method of establishing the ideal DB system that has liaisons between the Ministry of Land, Infrastructure and Transport and the National Emergency Management Agency is discussed in this study. Furthermore the optimization of DB utilization will assist the various integrated steep slope management systems based on U-IT which are ongoing projects.

A Method of Extraction Landslide Risk Area using GIS (GIS를 이용한 산사태 위험지역 추출 기법)

  • Yang In-Tae;Park Jae-Guk;Park Jung-Hwan;Park Hyung-Geun
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2006.04a
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    • pp.439-444
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    • 2006
  • Korea Peninsula consists of approximately 70% of mountainous terrain of total area, in addition, annual average rainfall is plentiful, especially during rainy season of summer, and it is often accompanied with typhoon and heavy rain, which results in frequent landslides. Since there are limitations with existing methods to analyze extensive disasters, it is necessary to develop new remote sensing technology using an artificial satellite to study on landslides closely. This paper is written in order to establish the database with map information on various landslides using GIS, furthermore, to analyze precariousness of the areas, which are susceptible to landslide, and risks of potential areas in consideration of heavy rain, based on land-cover classification derived from images from satellite.

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Design and Implementation of danger Situation Awareness System Based on Unmanned Aircraft Acquired Image (영상 기반의 위험 상황 인지를 위한 무인기 탑재 장비 및 분석 기술 설계 및 구현)

  • Shin, Won-Jae;Lee, Wonjae;Lee, Yong-tae
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2018.11a
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    • pp.156-157
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    • 2018
  • 본 논문에서 제안하는 기술은 무인기 획득 영상에 dense optical flow 기술을 적용하여, 이미지 내에서 급격히 움직이는 사물을 추출하는 기술이다. 제안 기술을 활용하여 사람, 사물 장소에 해당하는 시간에 따른 데이터인 다중로그 데이터로 융합 분석하여 낙석, 산사태, 비탈면 붕괴등을 감지 할 수 있게 되어 보행자의 안전을 보장 하고자 한다. 본 논문에서는 해당 기술을 구현하기 위한 무인기 및 탑재 장비와 데이터 처리를 위한 서버들간의 인터페이스 및 분석 알고리즘을 소개한다.

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A Study on the Category of Factors for the Landslide Risk Assessment: Focused on Feature Classification of the Digital Map(Ver 2.0) (산사태 위험도 항목 분류에 관한 연구 -수치지도(Ver 2.0) 지형지물 분류체계를 중심으로-)

  • Kim, Jung-Ok;Lee, Jeong-Ho;Kim, Yong-Il
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2007.04a
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    • pp.371-374
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    • 2007
  • For development of landslide risk assessment techniques using GIS(Geographic Information System), this study classifies the category of socioeconomic factors. The landslide quantitative risk assessment performs first prediction of flow trajectory and runout distance of debris flow over natural terrain. Based on those results, it can be analyzed the factors of socioeconomic which are directly related to the magnitude of risk due to landslide hazards. Those risk assessment results can deliver factual damage situation prediction to policy making for the landslide damage mitigation. Therefore, this study is based on feature classification of the digital map ver. 2.0 provided by the National Geographic Information Institute. The category of factors can be used as useful data in preventing landslide.

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The Assessment of Landslide Hazards in Gyeonggi Icheon area using GIS-based SINMAP Model Analysis (GIS기반의 SINMAP을 통한 경기도 이천지역의 산사태 위험도 분석)

  • Kwon, Ki-Bum;Lee, Hee-Chul;Chun, Jin-Soo
    • Proceedings of the Korean Geotechical Society Conference
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    • 2010.09a
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    • pp.782-789
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    • 2010
  • Landslides cause enormous economic losses and casualties. Korea has mountainous regions and heavy slopes in most parts of the land and has consistently built new roads and large-scale housing complexes according to its industrial and urban growth. As a result, the damage from landslides becomes greater every year. In this study, performed a GIS-based landslide hazard analysis by SINMAP(Stability Index MAPping) model in Gyeonggi Icheon area coupling with geomorphological and geological data. SINMAP model has its theoretical basis in the infinite plane slope stability model with wetness obtained from a topographically based steady state model of hydrology. To Gyeonggi Icheon area landslides hazards evaluated, these SINMAP model were analysed results while simultaneously referring to the stability index map, where lines distinguish the zones categorized into the different stability classes and a table giving summary statistics.

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Development of U-ICT Disaster Management System of Based on LBS(Location Based Services) (LBS기반 U-ICT 재난.재해관리 관제시스템개발)

  • Kim, Dong-Hyun;Jang, Yeon-Tae;Jeon, Hee-Jo
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2011.04a
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    • pp.233-236
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    • 2011
  • GPS 기반의 위치관제 시스템은 현재 교통, 물류관제, 보험, 보안 등 다양한 분야에서 활용되고 있다. 재난 재해관리를 방재 분야에서도 다양한 형태의 위기 상황에 대응하기 위해 재난 재해 종류 및 규모별로 다양한 정보자원을 이용해야 하고 인적 물적 자원을 활용하여 빠르게 대응해야 한다. 특히 산불, 산사태, 태풍, 홍수해 등의 광역의 자연재해뿐만 아니라 주요시설물 및 문화재 등의 인위적 재난 방재 분야에서도 중앙정부 차원의 U-ICT기술을 이용한 실시간 통합 예방 대응관리 시스템이 필요하다. 본 연구에서는 스마트 폰 및 GPS-CDMA단말기를 이용한 산불을 사례로 한 '자연재해관제시스템' 개발과 함께 문화재를 대상으로 한 'LBS기반 문화재위험관리시스템'에 대한 구현 방법에 대하여 제안하며 기존의 인적 자원과 물적 자원의 총괄적인 관리와 차세대 문화재 위험관리 시스템 구축 방향을 제시하였다.

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