• 산업기술연구
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• 제21권A호
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• pp.303-315
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• 2001

This study is a research result of investigating causes of landslides occurred at Uijongbu in Kyonggi Province, Korea. For works of this research, informations and data about landslides occurred at the site, geological and topographical informations were collected to analyze causes of landslides, and mapping landslides was performed by using results of field investigation. Data about rainfall during occurrence of landslides around Uijongbu was also used to find the effect of intense rainfall on occurrence of landslides. Based on informations obtained from field investigation and collected data, the scale and the pattern of landslides were analyzed and influencing factors on landslide such as intensity and duration of rainfall, topography, geologic condition, geotechnical engineering properties of ground, forestry were investigated statistically to find causes of landslides. On the other hands, for geotechnical engineering respects, slope stability analysis was performed for the typical sites chosen from the sites where the landslides occurred, using informations obtained from detailed topographical survey with total stations, field reconnaissance and results from laboratory tests.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.302-311
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• 2008

There have been repetitive landslides and debris flows on natural terrain induced by intensive rainfalls which have never been experienced during the last a few decades in Korea. Frequencies and magnitudes of landslides and debris flows are steeply increased after 2000 resulting in huge damages of human beings and facilities. According to a statistical data from NEMA, the human deaths induced by landslides and slope hazards occupies 22.3% of the total human deaths by all the natural hazards in Korea during the last 30 years. Among the human deaths by landslides and slope hazards, 85% of the damages were caused by landslides and debris flows on natural hazards. Therefore, this paper summarizes important events of landslides and debris flows, their characteristics, and suggests some methods of damage mitigation.

• 지질공학
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• 제16권2호
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• pp.201-214
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• 2006

이 연구는 1998년 여름철에 지질조건이 서로 다른 경기도 장흥, 경북 상주 및 포항지역에서 산사태가 많이 발생된 곳의 강우자료와 산사태들을 조사하여 강우조건에 따른 산사태의 특성을 분석하였다. 연구지역들에서는 $2{\sim}4$일간에 걸친 집중호우로 인해 많은 산사태들이 발생되었다. 강우자료는 지역별로 산사태밀집지역을 중심으로 반경 약 50 km 내에 위치 한 관측소들에서의 기록을 기초로 하였으며, 산사태자료는 현장조사를 통하여 직접 확인된 산사태만을 대상으로 하였다. 산사태를 유발하는 강우조건은 크게 누적강우량과 강우강도로 구분하고 산사태는 지질조건을 고려한 지역별 발생빈도 등으로 구별하여 이들의 관계를 통계적으로 분석하였다. 산사태들은 집중호우에 의해 발생되었고 국지적으로 밀집되는 양상을 보이는 등 강우와 산사태는 매우 밀접한 연관성을 보였다. 강우를 지배하는 여러 요소 즉, 누적강우량, 강우강도 및 강우지속시간 등이 지역별로 다른 양상을 보였으며, 그에 따른 산사태의 양상이나 발생빈도 또한 각기 다른 것으로 분석되었다. 누적강우량이 많은 지역에서만 산사태가 집중적으로 발생하였고 그 지역을 벗어난 바로 인근지역에서는 산사태가 거의 발생되지 않음으로써 강우가 산사태를 유발하는 매우 중요한 외적 요인으로 간주되고, 누적강우량과 산사태빈도는 서로 상관관계를 갖는 것으로 분석되었다.

• Steel and Composite Structures
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• 제48권5호
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• pp.499-505
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• 2023

Geological hazards in landslide is one of the most extensive and destructive phenomena are among natural disasters. According to the topography high mountains, tectonic activity, high seismicity, diverse conditions Geology and climate, basically China to create a wide spectrum of landslides have natural conditions and these landslides are annual. They cause a lot of financial losses to the country. It is very difficult to predict the time of the landslide, hence the identification landslide sensitive areas and zoning of these areas based on the potential risk is very important. Therefore, it should be susceptible areas landslides should be identified in order to reduce damages caused by landslides find. the main purpose of landslide sensitivity analysis is identification high-risk areas and as a result, reducing damages caused by landslides It is the way of appropriate actions.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 춘계 학술발표회 초청강연 및 논문집
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• pp.1378-1385
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• 2008

The probability of landslide hazards was predicted to natural terrain around the stone relics of Jinjeon-saji area, which is located in Yangyang, Kangwon Province. As the analysis results of field investigation, laboratory test and geology and geomorphology data, the effect factors of landslides occurrence were evaluated, and then the landslides prediction map was made up by use of prediction model considering the effect factors. The susceptibility of stone relics induced by landslides was investigated as the grading classification of occurrence probability using the landslides prediction map. In the landslides prediction map, the high probability area of landslides over 70% of occurrence probability was 3,489m3, which was 10.1% of total prediction area. If landslides are occurred at the high elevation area, the three stories stone pagoda of Jinjeon-saji (National treasure No.122) and the stone lantern of Jinjeon-saji (Treasure No.439) will be collapsed by debris flow.

• 한국안전학회지
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• 제37권6호
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• pp.148-157
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• 2022

Every year, particularly during the monsoon rainy season, landslides at the Chuncheon province of South Korea cause tremendous damage to lives, properties, and infrastructures. More so, the high rainfall intensity and long rainfall days that occurred in 2020 have increased the water content in the soil, thereby increasing the chances of landslide occurrences. Besides this, the rainfall thresholds and characteristics responsible for the initiation of landslides in this region have not been properly identified. Therefore, this paper addresses the rainfall thresholds responsible for the initiation of landslides at Chuncheon from a regional perspective. Using data obtained from rainfall measurements taken from 2002 to 2011, we identify a threshold relationship between rainfall intensity and rainfall duration for the initiation of landslides. In addition, we identify the relationship between the rainfall intensity using a 3-day, 7-day, and 10-day antecedent rainfall observation. Specifically, we estimate the rainfall data at 8 sites where debris flow occurred in 2011 by kriging. Following this, the estimated data are used to construct the relationship between the intensity (I), duration (D), and frequency (F) of rainfall. The results of the intensity-duration-frequency (IDF) analysis show that landslides will occur under a rainfall frequency below a 2-year return period at two areas in Chuncheon. These results will be effectively used to design structures that can prevent the occurrence of landslides in the future.

• 한국지반공학회지:지반
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• 제6권2호
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• pp.55-66
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• 1990

강우는 산사태 발생유인중 가장 큰 요소중에 하나이다. 다우지역에 속하는 우리나라는 강우의 계절적 편중으로 발생되는 산사태로 매년 인명 및 재산상의 많은 피해를 받고 있으나 산사태 극심 지의 조사나 예측기구의 체계화가 충분히 실시되어 있지 못하다. 따라서 본 연구에서는 사전 예방 적인 측면에서 산사태의 피해를 극소 화하기 위해 1977년에서 1987년 사이에 우리나라에서 발생된 주요 산사태에 관련된 자료 및 측영전의 강우기록을 참고하여 산사태와 강우사이의 관계가 통계적학적으로 검토 분석되었다. 본 연구 결과 우리나라에서 발생되는 산사태는 그 지역의 당일강우량과 누적강우량의 영향을 받는 정도에 따라 중부지역, 영,호남지역 및 영동지역의 3개지역으로 구분할 수 있었다. 또한 우리나라의 산사태는 최대시간강우강도와 누적강우량의 모두에 영향을 받고 있으며 이 두 기준에 의거하여 산사태를 발생규모별로 예보하는 것이 바람직하다.

• 환경영향평가
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• 제22권1호
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• pp.39-50
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• 2013

Occurrence of landslides has been increasing due to extreme weather events(e.g. heavy rainfall, torrential rains) by climate change. Pyeongchang, Korea had seriously been damaged by landslides caused by a typhoon, Ewiniar in 2006. Moreover, the frequency and intensity of landslides are increasing in summer due to torrential rain. Therefore, risk assessment and adaptation measure is urgently needed to build resilience. To support landslide adaptation measures, this study predicted landslides occurrence using MaxEnt model and suggested susceptibility map of landslides. Precipitation data of RCP 8.5 Climate change scenarios were used to analyze an impact of increase in rainfall in the future. In 2050 and 2090, the probability of landslides occurrence was predicted to increase. These were due to an increase in heavy rainfall and cumulative rainfall. As a result of analysis, factors that has major impact on landslide appeared to be climate factors, prediction accuracy of the model was very high(92%). In the future Pyeongchang will have serious rainfall compare to 2006 and more intense landslides area expected to increase. This study will help to establish adaptation measure against landslides due to heavy rainfall.

• Journal of Forest and Environmental Science
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• 제33권2호
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• pp.130-135
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• 2017

In temperate monsoon regions, extensive shallow landslides triggered by heavy rainfall are recurrent phenomena in mountainous areas. 1,357 landslides over Jinbu area, Korea that totaled 127 km2 were identified from aerial photographs and field survey. We examined characteristics of rainfall-induced shallow landslides and casual factors affecting landslide distribution with respect to topographic and forest settings, and land use. Most landslides occurred in the study area were the results of a complex combination of precondition, preparatory factors and triggering factors. Cumulative rainfall and high intensity rainfall during short period of time made the study area very sensitive to landslides and played as catalysts to enable other factors including topographic and forest settings, and land use to act more effectively. In addition, some landslides at lower elevation involved channel incision or bank erosion influenced by land use changes such as deforestation and intensification of agriculture surrounding riparian forests or hillslopes. The results suggest that most of landslide were triggered by heavy rainstorms while topographic, forest settings, and land use affected landslide distribution occurred in the study area.

• 한국측량학회지
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• 제32권3호
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• pp.261-269
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• 2014

Most areas in Gangwon-do are mountainous regions where causes heavy damages due to landslides. It is important to analyze basic factors influencing the cause of landslides in order to prevent such landslides. For this study, a landslide occurring site is extracted from aerial images taken after the landslide caused by typhoon 'Ewiniar' in Pyeongchang area 2006. Also, the overlay analysis with the topographic, forest, and soil maps in this area is performed using GIS based methods. In addition, the topographic, forest, and soil characteristics relating to the landslide factors are analyzed. As a result, large numbers of landslides occurred at a slope angle of $20^{\circ}-40^{\circ}$. In the case of the forest factors, there are close relationships between the artificial pine and larch forests and the frequency of landslides. The low forest density represents a weakness in landslides. In the case of the soil factors, a higher level in the surface soil with a type of sandy loam soil, a higher gravel content in subsoil, and a higher degree of acid rocks in soil parent materials cause higher frequencies in landslides.