• Geomechanics and Engineering
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• 제34권2호
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• pp.187-195
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• 2023

Intensive rainfall during the summer season in Korea has triggered numerous devastating landslides outside of downtown in mountainous areas. The 2D slope stability analysis that is generally used for cut slopes and embankments is inadequate to model slope failure in mountainous areas. This paper presents a new 3D slope stability formulation using the global sliding vector in the limit equilibrium method, and it uses an ellipsoidal slip surface for static and quasi-static analyses. The slip surface's flexibility of the ellipsoid shape gives a lower FS than the spherical failure shape in the Fellenius, Bishop, and Janbu's simplified methods. The increasing sub-columns of each column tend to increase the FS and converge to a steady value. The symmetrical geometric conditions of the convex turning corners do not indicate symmetrical failure of the surface in 3D analysis. Pseudo-static analysis shows that the horizontal seismic force decreases the FS and increases the mass volume at the critical failure state. The stability index takes the FS and corresponding sliding mass into consideration to assess the potential risk of slope failure in complex mountainous terrain. It is a valuable parameter for selecting a vulnerable area and evaluating the overall risk of slope failure.

• 한국환경과학회지
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• 제5권3호
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• pp.277-284
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• 1996

The Characteristics of atmospheric flow and dispersion of air pollutants in the mountainous coastal area were studied using two-dimensional model by the combination of land-sea breezes and transport. The pollutants emitted into the simulated wind field in considering with the mesoscale local circulations. The typical effects of land-sea breezes and tophography of coastal area on the dispersion are discussed in detail, and the model is proved as an useful tool to pridict real time pollutant transport by the results of application studies in Pusan, Korea where the urbanized coastal area with mountainous topography. It was found that sulfur dioxide ($SO_2$) are differently transported and concentrated as going inland by the influence of the sea breeze with topographic changes. Key words : land-sea breezes, sulfur dioxide, dispersion, coastal area.

• 한국환경과학회지
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• 제15권10호
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• pp.967-973
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• 2006

In this study used tank model and specific discharge to calculate low-flow of mountain basin and supply data that need in water resources plan. Low-flow is calculated byspecific discharge and area ratio method as resulted that calculate storage of low-flow by tank model was construed that showd all similar aspect. In judged to help in water resources plan establishment calculating low-flow using model to supplement uncertainty of observed data in that calculate of low-flow ungaged mountain area. It shows by economical and realistic plan until 12 years after development that run parallel and use economic performance analysis result valley flow and groundwater. But wide area water services and Chungju dam since 12 years onward was expose that is economic.

• 농촌계획
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• 제8권3호
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• pp.25-32
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• 2002

The purpose of this study is to define the concept of Hilly/Mountainous and Less-Favored Areas from the viewpoint of agricultural infrastructure, and to establish selection criteria and categorize of that areas. Using three type guidelines which were the rates of forest(above 50%), farmhouse population(above 50%) and infrastructure improvement(below 50%), the regions of 605 Eup Myon were selected to Hilly/Mountainous and Less-Favored Area. And for applying to regional development planning, the legions of eup myon were classified 4 types using average of the rate of forest and aged farmhouse population(75%, 17.5%). To conserve the farmland in Hilly/Mountainous and Less-Favored Areas, it requires continuous research on systematic approach method. Especially, it is necessary to investigate a development formula according to farmland scale and desolated degree through analysis of the actual condition of farmland.

• 한국산림과학회지
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• 제45권1호
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• pp.37-45
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• 1979

본(本) 연구(硏究)는 임업(林業) 생산(生産)의 주축(主軸)을 형성(形成)하고 있는 산촌(山村)이란 특수지역(特殊地域)을 대상(對象)으로 산촌입구(山村入口)의 대량(大量) 유출(流出) 현상을 고찰하고 산촌(山村) 노동력(勞動力)의 변화(變化)가 농가경영(農家經營)과 임업생산(林業生産)에 미치고 있는 파급(波及) 양상(樣相)을 분석(分析) 검토(檢討)하고자 시도 되었으며 그 결과(結果)는 다음과 같다. 1. 산촌내(山村內) 입구(入口)의 대량(大量) 유출(流出)은 70년대(年代) 중반(中半)부터 표면화(表面化)되고 있으며 전출(轉出) 속도(速度)는 점차 가속화(加速化) 하고 있다. 2. 입구(入口) 유출(流出)은 임업생산(林業生産)이 활발(活發)치 못한 지역(地域)에서 임업생산(林業生産)이 활발(活發)한 지역(地域)보다 더욱 심하다. 3. 임업(林業)이 선진(先進)한 산촌(山村)에서는 임업생산(林業生産) 활동(活動)을 통(通)해 농가(農家)의 잉여축적(剩余蓄積)이 가능(可能)하였고 농민층(農民層)의 분화(分化) 현상(現象)이 나타나고 있으며 농촌업(農村業)을 중심(中心)으로 하는 농가(農家)의 겸업화(兼業化)가 진행(進行)중에 있다. 4. 산촌(山村)의 입구유출(入口流出)은 16~30재(才) 계층(階層)이 82~85%를 차지하고 있으며 결과적(結果的)으로 노동력(勞動力)의 노령화(老令化) 부녀화(婦女化) 등 질적(質的) 저하(低下) 현상이 현재화(顯在化)하고 있다. 5. 임업노동(林業勞動) 시장(市場)의 성격(性格)은 유촌지역내(由村地域內)에서 수급(需給)이 조절되던 과거(過去)의 폐쇄적(閉鎖的)인 모습에서 개방적(開放的)인 모습으로 변화(變化)되어 가고 있다.

• 전기학회논문지
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• 제56권6호
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• pp.1031-1034
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• 2007

Electric transmission lines pass through a variety of area. Foundation supporting the conductors and tower are selected properly in accordance with external load, for example dead load, wind load, snow load, construction load etc, and topography and geology condition. Typical types of foundation are as follows: pad foundation for small load and hard soil or rock in mountainous area, pile foundation for medium or large load and soft soil in plain field area. This paper introduced cylindrical foundation design & construction for large load and mountainous area. This foundation failure mode against pulling-out show splitting failure by tensile force toward circumferential direction.

• Parasites, Hosts and Diseases
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• 제59권2호
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• pp.131-138
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• 2021

Helminth infections are prevalent in Lao People's Democratic Republic (Lao PDR). This study aimed at determining the prevalence and risk factors of intestinal helminthiasis in remote mountainous villages of northern Lao PDR. During the dry season in January 2017, a cross-sectional survey was conducted in 3 remote mountainous villages in Oudomxay province, Lao PDR. Villagers older than 18 years of age who agreed to submit stool samples or undergo an interview, were recruited. Stool samples from 198 individuals were examined by the Kato-Katz method, and a questionnaire surveyed 161 individuals among them. Univariable and multivariable logistic regression analyses were used to identify risk factors associated with the intestinal helminthiasis. An overall prevalence of intestinal helminthiasis was 75.8%. Hookworm infection was the most common (63.1%), followed by Opisthorchis viverrini/minute intestinal flukes (17.7%), Taenia spp. (15.2%), Trichuris trichiura (2.0%), Ascaris lumbricoides (1.5%), and Enterobius vermicularis (1.0%). Questionnaire analysis revealed sex (male) and absence of latrine to be significant risk factors for hookworm infection and consumption of raw meat for taeniasis. These results suggest that the mountainous area in northern Lao PDR has a different composition of helminth infections from other studies conducted in Lao PDR; a high prevalence of hookworm infection and taeniasis and low prevalence of T. trichiura and A. lumbricoides infections were observed. Also, liver flukes or intestinal flukes were similarly prevalent in the mountainous area.

• 대한지리학회지
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• 제43권6호
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• pp.843-857
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• 2008

본 연구에서는 강원도 산지지 역의 자연재해의 빈도 및 피해액의 분포 특성을 파악하고 이와 관련된 기후요소의 변화를 분석하였다. 최근 5년($2003{\sim}2007$년) 동안 강원도 산지지역에서는 총 27회의 자연재해가 발생하였으며 그 중 호우에 의한 재해가 16회로 가장 많다. 재해가 가장 빈번했던 지역은 평창군 진부면으로 총 9회 발생하였다. 강원도 산지지역에서 자연재해에 의한 피해는 그 주변지역보다 크며, 산지지역 내에서는 해발고도가 높은 지역에서 피해가 더 크다. 강원도 산지지역의 북서부 지역에는 주로 호우에 의한 피해만 있었으며, 태풍에 의한 피해는 산지의 남부 지역에 집중되었다. 강풍에 의한 피해는 대부분의 산지에서 나타나는 반면 대설에 의한 피해는 적다. 강원도 산지지역에서 강수량, 강수강도 및 호우일수는 증가하였고 2000년대에 들어서 강수강도의 증가 경향이 뚜렷하다. 반면 2000년대 이후 강설일수, 강설량 및 대설일수는 뚜렷하게 감소하고 있다. 강원도 산지지역에서는 최근 호우에 의한 재해가 가장 빈번하였고 강풍의 경우 감소하는 경향이나 호우와 함께 발생할 경우 그 피해가 크므로 호우 및 강풍에 의한 재해에 대한 대비가 중요하다.

• 농업과학연구
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• 제43권1호
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• pp.40-51
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• 2016

This study analyzed settlement condition changes of Chungcheong region's mountain area during 10 years, from 2001 to 2012. We performed factor analysis and cluster analysis of data from the 'Census for Mountain Area' carried out by the Korea Forest Service in 2001 and 2012. Factors 1, 2, 3, and 4 represent 'the superiority of non-agricultural income', 'the industrialized mountainous area', 'residential conveniences and benefits', and 'the use of forest resources', respectively. Clusters 1, 2, 3, 4, and 5 are categorized as 'non-agricultural income', 'various mass social functions', 'production of forest products', 'industrialized mountainous region', and 'ordinary mountain region', respectively. We suggest that cluster 1 has potential for development and should be promoted as a possible tourist attraction by digging up geographically unique themes. Cluster 2 has great potential for development and needs planned management through the maintenance or expansion of existing infrastructure. Cluster 3 has potential for development with various high value added industries uncovered. Cluster 4 shows vitality as it holds plenty of more job opportunities than other regions. Cluster 5 is deteriorating as a mountainous region because of an aging population, and it urgently demands development. For a decade, 45 of the 60 regions belonged to a single category, which are now differentiated broadly into two types: Firstly, deterioration changes to potential development and Secondly, vitality is differentiated into potential development and deterioration.

• 한국대기환경학회지
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• 제8권3호
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• pp.169-178
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• 1992

Dispersion of pollutant in a mountainous area is simulated in a wind tunnel. In the northwest side of the terrain model, the sea level is assumed. Wind from the sea initially confronts hills along the shoreline, a line of large buildings next, and finally a valley between high mountains in the south and in the east. In the northwest wind conditions, severe flow separation occurs in the lee side of hills, even beyond the building area. Pollutant from the buildings is trapped in this region and its concentration is the highest. In the west wind conditions, pollutant from the buildings flows along the hills aslant the main wind direction in this case. Since large valley is located in the downstream, pollutant tends to disperse along the valley.