• Title/Summary/Keyword: Mountain slope

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Ecological Diagnosis on Mt. nam in Seoul, Korea (남산의 생태학적 진단)

  • 이창석;문정숙;김재은;조현제;이남주
    • The Korean Journal of Ecology
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    • v.21 no.5_3
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    • pp.713-721
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    • 1998
  • The effects of artificial interference on the vegetation landscape in Mt. Nam of Seoul, Korea were clarified by analysing the distribution of vegetation landscape element and the number and size of patch depicted as a vegetation map in terms of landscape ecological principles. The effects of artificial interference on vegetation were also confirmed from the environmental gradient analysis on plant community extended from the lowland to the peak of that mountain. Vegetation landscape elements were divided into plantation and secondary forest in actual vegtation map. The ratio of plantation to secondary forest was higher in the lowland below mid-slope and the southern slope. Most afforested land were occupied by Robinia pseudoacacia and Populus tomentoglandulosa, Pinus rigida, P. koraiensis, Metasequoia glyptostroboides, Alnus hirsuta and so on are localy planted. In addition, projects to replace those afforested trees by P. densiflora as a kind of campaign for "Restoration of the one original feature of Mt. Nam" or to replace those tree species by planting young Abies holophylla or P. koraiensis under the mature afforested trees are also carried out in recent years. In cases of secondary forest, the southern slope was dominated by P. densiflora and the northern one by Q. mongolica. But the lowland of the northern slope is dominated by P. densiflora as the same as that in the southern slope. Vegetation landscape elements in Mt. Nam were much simplified comparing with that of suburban area around Seoul. The number of patches, which reflects the degree of diverse artificial interference was more in the lower area than in the upper area and more in the southern slope than in the northern one. On the other hand, the size of patch showed the antagonistic tendency to that of the number of patch. As a result of environmental gradient analysis, vegetation distribution in Mt. Nam was different from that in suburban area around Seoul. For example, Alnus japonica community, Zelkova serrata community, and Carpinus laxiflora community, which is established in mountain comparatively rare in artificial interference disappeared in Mt. Nam. As a result of analysis on vegetational succession in P. densiflora community and Q. mongolica community, both communities showed a tendency of retrogressive succession differently from that in control site located in suburban area around Seoul. In addition, species composition of P. densiflora and Q. mongolica communities in Mt. Nam were also different from those in Mt. Surak located around Seoul. It was interpreted that those results were originated from the environmental pollution and excessive arti ficial interferences.rferences.

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Studies on the Construction and the Artificial Mountain Theory of Amisan in the Gyeongbok Palace (경복궁 아미산의 조영과 조산설(造山說)에 관한 고찰)

  • Jung, Woo-Jin;Sim, Woo-Kyung
    • Journal of the Korean Institute of Traditional Landscape Architecture
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    • v.30 no.2
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    • pp.72-89
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    • 2012
  • This study aimed to reconsider the theory that the renowned Amisan(峨眉山) terraced garden at north of Gyotaejeon(交泰殿) was artificially made, by reviewing the historical records and drawings. It has been widely accepted that Amisan was made of the digged soil from Gyeonghoeji(慶會池). But several arguments about artificial mountain theory of Amisan that completely not be found in historical records have been raised in this study. The results were summarized as follows; the inherent contradiction in existing opinion, the discordance between the time of building Gyeonghoeji and Gyotaejeon, the existence of the mountain range which connect Baekaksan and Amisan appeared in Dohyeong(圖形), historical documents written in the years of kingdoms of Youngjo(英祖) and Gojong(高宗), a high position seen from Heungbogjeon(興復殿) in the north Amisan through the wall in the east but impassable, an opinion about realization Amisan as geomantic term of Amisa(蛾眉砂) at the time of Gyeongbok Palace reconstruction, and preservation of the mountain range in Gyeongbok Palace that comes from the result of the arguments in main mountain of Gyeongbok Palace in the year of Sejong(世宗). In addition, it was investigated why the slop in the north of Gyotaejeon was named as Aminsan and why the artificial mountain theory is appeared and made a conclusion that the Amisan comes from the change of the pronunciation of the geomantic term "Amisa", and modeling the yijing[意景] of Amisan which is a sacred place of Taoism and Buddhism in Sichuan[四川] of Chinaand the view of construction to mean defeating a spirit of smallpox which had to be cured. And it seems to be a result which retroactively applied the artificial mountain theory of Amisanis the technique of 'constructing mountain with digged pond dirt' to the relationship between Gyeonghoeji and Amisan. The greater part of mountain range which was connecting with Baekaksan and Amisan was seriously disconnected with large scale of exposition by the Japanese colonial period in 1915. But low slope is kept about 70 meters along the trail northeast of Gyotaejeon. Accordingly, it is judged that the range has not been entirely destroyed. And according to the result of elevation analysis, discontinuous slope form certain axis is found, so the mountain range of Amisan is approximately estimated. This basic research about the mountain range of Amisan might provide a critical clue about restoration of topography in Gyeongbok Palace.

A Study on the Wall and Reservoir at the Valley Part of Stone Fortress - Focused on the Fortress of $Geoyeol-seong$ and $Seongsan-seong$ - (석축 산성의 계곡부 체성과 못(池)에 관한 연구 - 거창 거열성과 함안 성산산성을 중심으로 -)

  • Kwon, Soon-Kang;Lee, Ho-Yeol;Park, Un-Jung
    • Journal of architectural history
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    • v.20 no.3
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    • pp.7-22
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    • 2011
  • With the accumulations of outcomes from archaeological excavations of mountain fortress of three kingdoms period, there have been studies about time-periodic territory range of mountain fortress, difference in the way(method) of construction, defence system and so on from various points of view. This is an empirical study on the construction method of the valley part of stone fortress. First of all, it is required to secure large quantity of fresh water for those who lived at mountain fortress. Especially when builders of fortress construct a fortification at the valley part of stone fortress, in advance they must sufficiently consider several options including the establishment of sustainable water resources. First, when it comes to build a fortification on a ridge[or a slope] of a mountain, you have only to consider a vertical stress. However, when it comes to build a fortification at the valley part of a mountain, You must have more sufficient preparations for the constructing process. Because there are not only a vertical stress but also a horizontal pressure simultaneously. Second, a fortification of mountain fortress built by using unit building stone is a structure of masonry construction like brick construction, and the valley part of it is where the construction of the fortification begins. Third, when it comes to build a fortification at the valley part of a mountain, it seems that they use a temporary method such as coffer dam in oder to prevent the collapse of the fortification due to heavy rain. Furthermore, in response to a horizontal pressure a fortification is built by the way of its plane make an arch, or by piling up the soil with the plate method(類似版築) and earthen wall harder method(敷葉) they increase cross-sectional area of the fortification and its cutoff capacity. In front direction they put the reservoir facility for the fear that the hydraulic pressure and earth pressure are directly transmitted to the fortification. The process of constructing the fortification at the valley part of a mountain is done in the same oder as follows; leveling of ground(整地) ${\Rightarrow}$ construction of coffer dam ${\Rightarrow}$ construction of the fortification between the both banks of the valley ${\Rightarrow}$ construction of the fortification at bottom part of spill way(餘水路) between the both banks of the valley ${\Rightarrow}$ construction of spill way(餘水路) & reservoir facility ${\Rightarrow}$ construction of the fortification at upper part of spill way between the both banks of the valley. Coffer dam facility seems to be not only the protection device on occasion of flood but also an important criterion to measure the proper height of spill way or tailrace(放水路). This study has a meaningful significance in that it empirically examines the method of reduction of the horizontal pressure which the fortification at the valley part of a mountain takes, the date the construction was done, and wether the changes in climate such as heavy rainfall influence the process of construction.

A STUDY on FOREST FIRE SPREADING ALGORITHM with CALCULATED WIND DISTRIBUTION

  • Song, J.H.;Kim, E.S.;Lim, H.J.;Kim, H.;Kim, H.S.;Lee, S.Y
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 1997.11a
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    • pp.305-310
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    • 1997
  • There are many parameters in prediction of forest fire spread. The variables such as fuel moisture, fuel loading, wind velocity, wind direction, relative humidity, slope, and solar aspect have important effects on fire. Particularly, wind and slope factors are considered to be the most important parameters in propagation of forest fire. Generally, slope effect cause different wind distribution in mountain area. However, this effect is disregarded in complex geometry. In this paper, wind is estimated by applying computational fluid dynamics to the forest geometry. Wind velocity data is obtained by using CFD code with Newtonian model and slope is calculated with geometrical data. These data are applied fer 2-dimentional forest fire spreading algorithm with Korean ROS(Rate Of Spread). Finally, the comparison between the simulation and the real forest fire is made. The algorithm spread of forest fire will help fire fighter to get the basic data far fire suppression and the prediction to behavior of forest fire.

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WEB-BASED GEOGRAPHIC INFORMATION SYSTEM FOR CUT-SLOPE COLLAPSE RISK MANAGEMENT

  • HoYun Kang;InJoon Kang;Won-Suk Jang;YongGu Jang;GiBong Han
    • International conference on construction engineering and project management
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    • 2009.05a
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    • pp.1260-1265
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    • 2009
  • Topographical features in South Korea is characterized that 70% of territory is composed of the mountains that can experience intense rainfall during storms in the summer and autumn. Efficient planning and management of landscape becomes utmost important since the cutting slopes in the mountain areas have been increased due to the limited construction areas for the roadway and residential development. This paper proposed an efficient way of slope management for the landslide risk by developing Web-GIS landslide risk management system. By deploying the Logistic Regression Analysis, the system could increase the prediction accuracy that the landslide disaster might be occurred. High resolution survey technology using GPS and Total-Station could extract the exact position and visual shape of the slopes that accurately describe the slope information. Through the proposed system, the prediction of damage areas from the landslide could also make it easy to efficiently identify the level of landslide risks via web-based user interface. It is expected that the proposed landslide risk management system can support the decision making framework during the identification, prediction, and management of the landslide risks.

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Comparative Analysis of Observation and NWP Data of Downslope Windstorm Cases during 3-Dimensional Meteorological Observation Project in Yeongdong Region of Gangwon province, South Korea in 2020 (2020 강원영동 공동 입체기상관측 기간 강풍 사례에 대한 관측자료와 수치모델 비교 분석)

  • Kwon, Soon-Beom;Park, Se-Taek
    • Atmosphere
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    • v.31 no.4
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    • pp.395-404
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    • 2021
  • In order to investigate downslope windstorm by using more detailed observation, we observed 6 cases at 3 sites - Inje, Yongpyeong, and Bukgangneung - during "3-D Meteorological Observation Project in Yeongdong region of Gangwon province, South Korea in 2020." The results from analysis of the project data were as follows. First, AWS data showed that a subsidence inversion layer appeared in 800~700 hPa on the windward side and 900~850 hPa on the leeward side. Second, before strong wind occurred, the inversion layer had descended to about 880~800 hPa. Third, with mountain wave breaking, downslope wind was intensified at the height of 2~3 km above sea level. After the downslope wind began to descend, the subsidence inversion layer developed. When the subsidence inversion layer got close to the ground, wind peak occurred. In general, UM (Unified Model) GDAPS (Global Data Assimilation Prediction System) have had negative bias in wind speed around peak area of Taebaek mountain range, and positive bias in that of East Sea coast area. The stronger wind blew, the larger the gap between observed and predicted wind speed by GDAPS became. GDAPS predicted strong p-velocity at 0600 LST 25 Apr 2020 (4th case) and weak p-velocity at 2100 LST 01 Jun 2020 (6th case) on the lee-side of Taebaek mountain range near Yangyang. As hydraulic jump theory was proved, which is known as a mechanism of downslope windstorm in Yeongdong region, it was confirmed that there is a relationship between p-velocity of lee-side and wind speed of eastern slope of Taebaek mountain range.

Survey Research Regarding the characteristic of the Retirement House in Mountain Village of Shikoku - Focusing on Ochiai area in Higashiiyayama-son in Tokushima Prefecture of Japan (사국(四國)산촌의 은거옥(隱居屋)의 특성에 관한 조사연구 -일본 덕도현(德島縣) 동조곡산촌(東祖谷山村) 낙합지구(落合地區)를 중심으로-)

  • Park Chan
    • Journal of the Korean housing association
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    • v.17 no.4
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    • pp.57-64
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    • 2006
  • This research is the survey result of the retirement house in Ochiai area that is a famous as mountain village of Japan. This area is being formed in a steep slope and be arranged the building long a side along the contour line. As for the plan type of a main house 'the middle bedroom three-madori(bay) type' and 'the parallel two madori(bay) type' occupy many. As for in the retirement custom of Ochiai area the independence family style (separation/ separate meal/separate household economy) is a principle and a parents family builds the retirement house and move out. The plan. of the retirement house is two-room type of 'Omote(public room) and Uchi(kitchen and living room)' and agree with the plane prototype 'plan constitution of a necessary minimum' of farmhouse of this area. The reconstruction that the retirement house is remodeled handily with a main home, especially intend the convenience of the life such as a kitchen and toilet has been done. The retirement custom has been succeeded thoroughly until recent years in this area. However, this traditional custom is seeing the end, without there is the successor of a main house with depopulation.

A Study on Sansinkak of Korean Temple (한국 사찰 산신각(山神閣)의 건축적 특성과 성격 연구)

  • Yang, Sang-Hyun;Kim, Yae-Joung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.10
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    • pp.3982-3987
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    • 2010
  • `Sansinkak' is the building which contains the picture or statue of mountain god(=Sansin). It is also an expression of respect for the mountain god. This building is usually very small, so a few person can enter inside it. Because people pray to mountain god for personal purpose, sometime this wishes are exclusive and egoistic, so narrow space is more suitable. Sansin is not the original god of Buddhism, it is the god of folk belief of traditional Korea, so every Sansinkak is located in the back slope of the temples, away from Buddha's building, the center area. Sansinkak is not only the pathway of vital force from back mountains to the temple, but also the exit to the infinite nature as an extension of Buddhist belief.

A Study of Rehabilitation for Limestone Quarry Near Baekdu Daegan Mountain System(1) -In Case Study for Hydroseeding Experiment on Okke Quarry- (백두대간에 인접한 석회석 광산의 식생복구 연구(1) - 종자파종에 의한 옥계 광산복구 시험시공 -)

  • Kim, Kyunghoon;Joo, Paik;Kim, Haksung
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.14 no.4
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    • pp.55-66
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    • 2011
  • The objective of this study was to investigate the possibility of seeding methods for quarry rehabilitation. To achieve the objective, the experiment was designed for rehabilitation of quarry with seed mixing types (woody type and herbaceous type) and forest topsoil. Seeds and seeding materials were applied to the quarry slope using hydroseeding measures. The study was conducted in limestone quarry (Lafarge Halla Cement Inc.) near Baekdu Daegan Mountain System at Okke, Kanwon-do. The experimental seedbed was set in 2007 and field investigation was carried out from 2007 to 2010. As the result of experiment, it was found that the early-phase pattern for surveyed species to establish was affected by the soil mixture types. The mixture type of herbaceous seeds resulted in the higher plant coverage than the woody seeds. The application of forest topsoil showed a potential increase the plant diversity, but it was affected by mixing seeds. Naturally-emerged species as Alnus hirsuta, Quercus mongolica will be useful for rehabilitation at the quarry and damaged slopes.

Bund Collapse in Sloping Paddy Area by a Heavy Rainfall -Case Study for Dongrim-ri in Chungbuk Province- (집중호우에 의한 경사지논의 논둑붕괴 -충북 청원군 옥산면 동림리의 사례-)

  • 김진수
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.38 no.5
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    • pp.55-63
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    • 1996
  • The situation and cause of bund collapse in steep sloping paddy area by a heavy rainfall of Chungbuk Province were investigated by field surveys. Shapes of paddy plots are irregular and average size of them is 12.6a. Surface, groundwater and plot-to-plot irrigations are being carried out in the study plots. The type of bund collapse can be divided as follows: overflow type and inundation type. The overflow type generally occurs at the bund with slope lacking the design standard. The inundation type damages paddy plots more seriously than the overflow type. It induces continuous bund collapse from a inflow-plot to a outflow-plot and includes lots of type (inside paddy) collapse, which results in much subsoil erosion. The installation of mountain stream weir and maintenance of mountain stream are proposed to prevent the inundation type collapse.

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