• Title/Summary/Keyword: 산지도로

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Sensitivity of Runoff and Soil Erosion in the Burnt Mountains (산불지역의 유출 및 토양침식 민감도)

  • Park, Sang-Deog;Shin, Seung-Sook;Lee, Kyu-Song
    • Journal of Korea Water Resources Association
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    • v.38 no.1
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    • pp.59-71
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    • 2005
  • Mountain watersheds are a lot of problems about soil erosion because of frequent wildfire occurrence. Runoff and soil erosion caused by the rain on a hillslope after wildfire are dependent on cover factor. And these has been a decrease by the cover factor recovery following time passage. The present paper defines the dynamic sensitivity of runoff and soil erosion that is the rate of runoff volume and soil erosion weight to rainfall energy and analyzes characteristics of the sensitivity for variation of cover factor, In according to the correlation analysis between other parameters and sensitivities, the sensitivity is the most dependent on the cover factor and the relation is exponential. The sensitivities after wildfire have suitable relation with treatment method for the mitigation of burnt forest and wildfire intensity. It was confirmed that the variation of soil erosion sensitivities come upon the range of stability in 5 years after wildfire.

Provenance Study on Lead Isotope of the Bronze Using a Korea Peninsula Lead Isotope Data - Focused on Bronze Relics Excavated from Cheonghaejin - (한반도 납광산의 납동위원소비를 이용한 청동 원료의 산지추정 - 청해진 출토 청동기를 중심으로 -)

  • Hwang, Jin Ju;Kim, So Jin;Han, Woo Rim;Han, Min Su
    • Journal of the Mineralogical Society of Korea
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    • v.27 no.4
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    • pp.263-270
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    • 2014
  • This paper was researched that provenance of the raw material for bronze relics excavated Cheonghaejin using the distribution of lead isotope ratio based on galena ores of South Korea. Also we want to make sure that the trace elements appearing as a by-product can be used as a secondary indicator for provenance research. In the case of the galena map of the East-North Asia (Mabuchi, 1985), data are plotted in China area. Therefore it is estimated that most bronzes were produced with lead ore from China. On the other hand, the same data are plotted in the Okcheon Metamorphic Belt and Yeongnam Massif of the galena map of South Korea (KOPLID, 2012). Also the contents of Ag and Sb are available as indicator due to separate ores from similar zone in lead isotope ratio.

Landslide Risk Analysis due to Development of Mountain Area (산지지역 개발에 의한 산사태 위험 분석)

  • Namgyun Kim;Yunseong Park
    • Journal of Korean Society of Disaster and Security
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    • v.16 no.4
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    • pp.67-74
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    • 2023
  • In this study, the risk of landslides was analyzed for planned development sites in mountainous areas. Field survey was conducted on the research area with the slope and valley site. The criteria for evaluating the risk of landslides in the field survey were based on the risk assessment table of the Korea Forest Service Notice No. 2023-10. The research area has 13 slopes and 11 valleys. As a result of evaluating the risk area, two slopes and two valley were found to be dangerous sites in each. Numerical simulation was performed on the investigated risk areas to predict the spread of damage. The debris flow was simulated to have an affect on roads and buildings located in the lower part of the basin, and it was determined that a disaster prevention facility was nacessary to minimize damage. This information can be used to determine the impact of disasters before carrying out mountain development.

Modeling of Debris Flow Around Road (도로에서의 토석류에 의한 홍수위험도 모델링)

  • Lim, Jae Tae;Kim, Byung Hyun;Han, Kun Yeun
    • Proceedings of the Korea Water Resources Association Conference
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    • 2015.05a
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    • pp.304-304
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    • 2015
  • 산지가 많은 우리나라에서 도로는 필연적으로 산지부를 지나가게 되어 토석류에 취약한 문제점이 있다. 2000년대 초반이전까지만 해도 통계자료조차 없었던 도로 인접지에서의 토석류의 발생이 최근 늘어나고 있는데 반해 도로에서의 토석류에 대한 연구는 초기단계에 있다. 도로에서의 사례를 제외하고 보면 2011년 발생한 서울 우면산에서의 토석류 발생 등 일부사례를 중심으로 발생 거동 해석을 수행한 연구결과가 있으나 이러한 연구 결과를 도로에 직접적으로 적용하기에는 어려움이 있다. 특히 도로에서 발생한 토석류에 대한 거동 분석을 수행할 필요가 있으나 이와 같은 문제로 인해 실제 도로에서 발생한 토석류 사례에 대한 거동 분석은 현재까지 이루어지지 않았다. 본 연구에서는 GIS를 이용한 지형분석 및 HEC-HMS를 이용한 수문분석을 실시하였고, 미연방재난관리청(FEMA)의 홍수보험지도와 하천재해해석을 위한 공식 인증 프로그램으로 등록되어 있는 토석류 거동 해석 프로그램인 FLO-2D을 이용하였다. 실제 도로에서 발생한 토석류 사례에 대하여 FLO-2D 모형을 이용하여 거동을 해석하고, 해석결과를 실제 발생한 토석류 자료와 적합도 분석을 수행하였다. 또한, 국내 도로 인접지에서의 토석류 해석에 대한 FLO-2D 모형의 적용 가능성에 대하여 연구하였다.

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Scientific Analysis and Provenance Study of Bronze Artifacts Excavated from Dongchon Site in Sunchang, Jeollabuk-do, Korea (전북 순창 동촌유적 출토 청동기의 원료 산지연구)

  • Bae, Go Woon;Chung, Kwang Yong
    • Journal of Conservation Science
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    • v.32 no.2
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    • pp.101-108
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    • 2016
  • Lead isotope ratio of bronze artifacts excavated from Dongchon Site in Sunchang have determined by TIMS. As results of comparison lead isotope ratio of bronze objects with the provenance data of galenas of Korea, China, and Japan, the provenance of three material of bronze objects were turned out to originate from the southern and northern part of China. On the other hands, data were plotted either in zone 3 of the South Korean galena map. The results of these scientific analysis of bronze objects can be used as basic data in comparison researches on manufacturing technology, provenance of bronze objects to be found in the future.

Provenance Analysis of Horse-shaped Bronze Buckles Excavated from Site of Songjeol-dong, Cheongju (납동위원소비 분석을 활용한 청주 송절동유적 출토 마형대구의 원료산지 고찰)

  • Bae, Go Woon;Lee, Sang Ok;Chung, Kwang Yong;Shin, Seoung Chul
    • Journal of Conservation Science
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    • v.35 no.3
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    • pp.209-216
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    • 2019
  • Lead isotope ratios in horse-shaped bronze buckles excavated from the Songjeol-dong site in Cheongju and the mid-western region of the Korean Peninsula have been determined by thermal ionization mass spectrometry. The lead isotope ratios of the samples with data provenance were plotted in zone 3 of the South Korean galena map. The results indicated that the horse-shaped bronze buckles could be made using galena located in the same area as the archaeological site. These results can be used as basic data for comparison purposes in future studies on the manufacturing technology and provenance of bronze artifacts.

A Study on the Optimum Particle Size Distribution of the Drainable Base in Mountain Road for the Prevention of the Pavement Damage by Uplift Seepage Pressure (산지도로의 상향침투수압으로 인한 포장파손 방지 배수성 기층재료의 적정입도 연구)

  • Lim, Young-Kyu;Kim, Young-Kyu;Yune, Chan-Young;Lee, Seung-Woo
    • International Journal of Highway Engineering
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    • v.13 no.2
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    • pp.21-29
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    • 2011
  • Recently, typhoons or heavy rainfalls frequently occurred because of the effect of global warming, which caused serious damage such as landslide of mountain road, debris flow and uplift seepage pressure. Uplift seepage pressure induced on the pavement of mountain roads may cause serious pavement damage. It was known that subsurface drainage method is very effective to reduce uplift seepage pressure. Suitable permeability and stiffness of drainable base is very important to have the effectiveness of subsurface drainage. In this study, optimum particle size distribution of drainable base is investigate to meet the required permeability and bearing capacity of drainable base.

Change Prediction of Future Forestland Area by Transition of Land Use Types in South Korea (로지스틱 회귀모형을 이용한 우리나라 산지면적의 공간변화 예측에 관한 연구)

  • KWAK, Doo-Ahn;PARK, So-Hee
    • Journal of the Korean Association of Geographic Information Studies
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    • v.24 no.4
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    • pp.99-112
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    • 2021
  • This study was performed to predict spatial change of future forestland area in South Korea at regional level for supporting forest-related plans established by local governments. In the study, land use was classified to three types which are forestland, agricultural land, and urban and other lands. A logistic regression model was developed using transitional interaction between each land use type and topographical factors, land use restriction factors, socioeconomic indices, and development infrastructures. In this model, change probability from a target land use type to other land use types was estimated using raster dataset(30m×30m) for each variable. With priority order map based on the probability of land use change, the total annual amount of land use change was allocated to the cells in the order of the highest transition potential for the spatial analysis. In results, it was found that slope degree and slope standard value by the local government were the main factors affecting the probability of change from forestland to urban and other land. Also, forestland was more likely to change to urban and other land in the conditions of a more gentle slope, lower slope criterion allowed to developed, and higher land price and population density. Consequently, it was predicted that forestland area would decrease by 2027 due to the change from forestland to urban and others, especially in metropolitan and major cities, and that forestland area would increase between 2028 and 2050 in the most local provincial cities except Seoul, Gyeonggi-do, and Jeju Island due to locality extinction with decline in population. Thus, local government is required to set an adequate forestland use criterion for balanced development, reasonable use and conservation, and to establish the regional forest strategies and policies considering the future land use change trends.

'90년도 정부의 양돈정책을 알아본다-돼지유통정책

  • Kim, Dong-Geun
    • The Korea Swine Journal
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    • v.12 no.1 s.125
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    • pp.93-95
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    • 1990
  • 앞으로는 산지에서 도축.해체된 지육과 부위별 대포장육(Box Meat)도 대도시 도매시장과 공판장에 상장될 수 있도록 해나가고, 육류등급제도 앞당겨 실시할 방침이다.

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Derivation of Suitable-Site Environmental Factors in Robinia pseudoacacia Stands Using Type I Quantification Theory (수량화이론 I방법에 의한 아까시나무 임분의 적지 환경인자 도출)

  • Kim, Sora;Song, Jungeun;Park, Chunhee;Min, Suhui;Hong, Sunghee;Lim, Jongsoo;Son, Yeongmo
    • Journal of Korean Society of Forest Science
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    • v.111 no.3
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    • pp.428-434
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    • 2022
  • This study was conducted to derive the site index of forest productivity of Robinia pseudoacacia (honey plant) to characterize suitable planting sites and to investigate the effect of the site environmental factors on the site index using the quantification theory I method. The data used in the analysis were growth factors (stand age, dominant height, etc.) of the 6th national forest resources survey and various site environmental factors of a forest soil map (1:5,000). The average site index value of the R. pseudoacacia stand in Korea was 14 (range, 8 to 18). The environmental factors affecting the site index were parent rock, climatic zone, soil texture, local topography, and altitude. The accuracy of the estimation model using quantification theory I was only 33%. However, the correlation between the site index and the site environmental factors was statistically significant at the 1% level. Results of quantification analysis between site index and site environmental factors revealed that metamorphic and igneous rocks received high grades as parent rocks, climate zones received higher grades than central temperate zone, clay loam and silt loam received high grades in soil texture, and hillside received a high grade in local topography. Analysis of the partial correlation between site topographical factors and forest productivity (site index) found that soil class and altitude were partially correlated to x by 0.4129 and 0.4023, respectively, indicating that these factors are the most influential variables.