• Journal of Sensor Science and Technology
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• v.24 no.5
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• pp.291-298
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• 2015

There are many landslides occurred by typhoons and intense rainfall during the summer seasons in Korea. To predict a landslide triggering it is important to understand mechanisms and potential areas of landslides by the geological approaches. However, recent climate changes make difficult to predict landslide based on only conventional prediction methods. Therefore, the importance of a real-time monitoring of landslide using various sensors is emphasized in recent. Many researchers have studied monitoring techniques of landslides and suggested several monitoring systems which can be applicable to the natural terrain. Most sensors of landslide monitoring measure slope displacement, hydrogeologic properties of soils and rocks, changes of stress in soil and rock fractures, and rainfall amount and intensity. The measured values of each sensor are transmitted to a monitoring server in real-time. The ultimate goal of landslide monitoring is to warn landslide occurrence in advance and to reduce damages induced by landslides. This study introduces the current situation of landslide monitoring techniques in each country.

• Journal of Korean Society of Forest Science
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• v.78 no.2
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• pp.228-241
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• 1989

The objectives of this study are to identify flood disasters resulted from heavy rainstorm including earth and stone-debris avalanches and also to develope the scientific data to be needed for establishing the landslide-related disaster prevention countermeasures. For this study, 5 Gun (district) regions including Booyeo, Seochun, Gongju, Boryung, and Chungyang in Chungchongnam-do of the central part of Korea, in which severe landslide damages have been triggered during 3 days from July 21 to July 23, 1987, were investigated. Mostly, landslides having death of human lives triggered from 6 a.m, to 8 a,m. on July 22, and the principal factor was proved to be the continuous heavy rain ; the continuous rainfall of internal region for 3 days measured about 300-673 mm. The structural measures for slope failure prevention countermeasures at the hollow part of upper hillslope should be required. Natural drainage network on slopes should not be disturbed in case of land use alteration, such as a chestnut planting work on hillslopes behind the houses particularly. There are so many problems in recognition of landslide disaster prevention countermeasures including evacuation exercises. More actual education of countermeasures for control of flood and landslide should be put to practice through "civil defense education" and "inhabitants' meeting." In this context, existing Erosion Control Stations of 13 regions established in each Province should not be reduced. The designation criterion and surveying processes of "Landslide Prone Site" published by Forest Administration should also be improved scientifically.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.249-249
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• 2012

기후변화의 영향으로 폭우발생 빈도 및 강도는 최근 들어 급증하고 있다. 빈번히 발생하는 대형 폭우에 의해 도시는 홍수와 산사태 등 많은 자연재해가 발생하고 있다. 최근 도시에서 발생한 대형 폭우재해의 1차적인 원인은 도시방재시설물 설계빈도를 상회하는 집중호우이지만, 방재를 고려하지 않은 도시계획 및 설계가 피해를 가중시킨 것으로 판단되고 있다. 대형화 및 일상화되어가는 폭우재해에 적응하기 위해서는 하수관거, 제방 등 전통적인 방재시설물 설계기준을 상향조정하는 구조물적 대책뿐만 아니라, 도시의 토지이용, 공원, 녹지, 광장, 도로 등의 구성요소를 활용하여 우수유출 저감 및 지연시켜 최대홍수량을 낮추는 비구조물적 적응방안도 필요하다. 기후변화에 따른 폭우재해에 도시차원에서 효과적으로 적응하기 위해서는, 다양한 폭우재해 적응 도시계획 및 설계기법을 개발하고, 그 효과를 시뮬레이션 할 수 있는 시스템 개발이 필요하다. 본 연구에서는 기존에 개발된 홍수 및 산사태 관련 시스템들과 연계하고 정부의 다양한 부처에서 구축된 DB를 최대한 활용하여 폭우에 의해 발생하는 도시 홍수와 산사태 피해지점과 피해 영향권을 분석뿐만 아니라 폭우재해 적응 도시계획 및 설계기법을 효율적으로 적용할 수 있는 관리지역을 도출하고, 관리지역에 폭우재해 적응 도시계획 및 설계기법 적용시 효과를 분석할 수 있는 기후변화 폭우재해 적응 도시조성 시뮬레이션 시스템 개발방향을 제시한다.

• Spatial Information Research
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• v.1 no.1
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• pp.89-94
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• 1993

GIS was appl ied for analysis of the potfnt ial degree of regional geologic hazard, expecially landslide, in the suburb of Seoul city. Potential elements causing a landslide are geology, slope geometry, groundwater, soil property, rainfall and vegetation etc. These factors were incorporated through GIS in order to predict the potential hazards, and to produce a regional geologic hazard map in the study area, For this study, ARC/INFO and ERDAS systems were used in SUN4-390 workstation.

• Journal of Korean Society for Geospatial Information Science
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• v.2 no.2 s.4
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• pp.43-53
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• 1994

GSIS(geo-spatial information system), particularly when utilized in hazard management decision, is one of hazard analysis tool. Data of GSIS input from digitizing or scanning of map or aerial photos. This paper focuses upon the hazard prediction in GSIS and RS analysis to assess map, aerialphotos, satellite imagery and soil map. This study found computation of hazard area analysis. the results is formed as raster data model of quadtree. Authors knew more accurate results of overlay. This paper shows building up integrated data base as well as search of hazard area in aerial photographs.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.06a
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• pp.300-302
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• 2013

자연재해의 예방에 대한 인식이 화두가 되면서 최근 재해 경보 시스템을 다루는 새로운 연구들이 활발히 진행되고 있다. 제안하는 알고리듬은 영상을 통해 얻은 정보를 이용하여 산사태를 초기에 검출하는 방법이다. 기존의 검출 방법은 사람이 직접 모니터링을 해야 하기 때문에 많은 인력과 시간을 필요로 하고 접근성이나 비용문제 등의 각종 제약이 따른다. 따라서 효율적인 산사태 감지를 위해 산사태 발생 가능 지역에 비디오 기반의 감지 시스템을 통해서 자동으로 검출하는 시스템이 필요하다. 감지 시스템에서는 신뢰성 있는 재난영역의 검출이 매우 중요하다고 볼 수 있다. 본 연구는 산사태를 검출하기 위하여 먼저 블록단위의 영역 움직임 검출을 하여, 움직임 맵을 만들고 일정한 시간 간격으로 반복적으로 변하는 영역의 움직임 맵을 기록한다. 또한 움직임 방향뿐만 아니라 발생 순서를 기록하여 더욱더 정확한 움직임을 판단할 수 있다. 제안된 알고리듬은 비디오영상 실험을 통해 탐지영역의 산사태 검출이 잘 이루어짐을 확인하였다.

• Journal of Korean Society of societal Security
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• v.1 no.4
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• pp.57-64
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• 2008

Korea has been suffered from serious damages of lives and properties, due to landslides that are triggered by heavy rains in every monsoon season. This study developed the physically based landslide prediction model which consists of 3 parts, such as slope stability analysis model, groundwater flow model and soil depth model. To evaluate its applicability to the prediction of landslides, the data of actual landslides were plotted on the areas predicted on the GIS map. The matching rate of this model to the actual data was 84.8%. The relation between hydrological and landform factors and potential landslide were analyzed.

• 한국방재학회:학술대회논문집
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• 2008.02a
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• pp.353-356
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• 2008

최근 대규모 산림재해로 인한 산림환경 훼손 및 산림 농가의 피해는 물론 산림생태계에도 나쁜 영향을 미치고 있으며 이는 사회적으로 매우 민감한 환경문제로서 국민의 주요 관심사가 되고 있다. 본 연구에서는 울진군 전체를 대상으로 GIS 및 RS 기법을 이용하여 다양한 산사태 관련 인자들을 추출 하여 이를 기반으로 GIS 중첩 및 가중치 분석을 통하여 울진군의 산사태 발생 가능 위험지역의 분포도를 작성하고자 한다.

• Journal of Korean Society of Forest Science
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• v.70 no.1
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• pp.77-83
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• 1985

By the continuous and heavy rainfall of 615 mm during 15 days, landslide disaster occurred on July 5, 1985 at a steep-sloped land in Munhyon-dong, Pusan. This landslide was sized about 50 m long at slided part and 50 m long at buried part down, 30 m in average width, and 2 m in average depth respectively. 37 human lives and the great amount of properties have been last as the result of this landslide from the steep-sloped land. Summarizing the results of this study, the national-wide plan for the steep sloped land failure control measures on the steep-sloped possible-danger places should be established in Korea.

• The Journal of Engineering Geology
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• v.24 no.4
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• pp.615-629
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• 2014

This study analyzed existing patents related to real-time monitoring and detection technology for landslides on natural terrain. The purpose of patent analysis is to understand landslide hazard technology trends and to develop new advanced technology. This study searched patent data using key words related to landslide monitoring and detection in Korea, the USA, Japan, China (Hong Kong), Europe, and Taiwan. The patents were divided into five main categories and five to seven subcategories in each main category and analyzed by year, country, and applicants. The results were utilized to derive a portfolio of promising technologies for each country. The analysis results will also contribute to the development of more effective research strategies and to categorize research findings from previous studies on landslide hazards.