• Journal of Korean Society of Forest Science
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• v.111 no.4
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• pp.511-529
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• 2022

The forest vegetation of the Korean Peninsula is dominated by deciduous Fagaceae forests. The study aimed to comparethe correlation between species composition and environmental factors in Namsan, Odaesan, and Ulleungdo. A vegetation survey of 75 sites was conducted from May to August 2018. Seven vegetation types were classified. The inland representative vegetation was classified as a Quercus mongolica community, and the island representative vegetation was classified as a Fagus multinervis community. The Quercus mongolica community was subdivided into the Aria alnifolia group, representative of cities, and the Tilia amurensis group, representative of mountainous regions. Analysis of important values and indicator species to examine the succession trends according to regional types showed that urban and island forestswere maintained as Fagaceae communities, and that mountainous region foreststransitioned to broadleaf species, such as Tilia amurensis and Carpinus cordata. A CCA analysis of vegetation type and site environmental factors showed that altitude had the biggest effect on species composition at the same latitude. The study results should contribute to a better understanding of the Korean Peninsula forest ecosystem characteristics and provide basic data for establishing a systematic conservation and restoration plan.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.33 no.2
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• pp.58-66
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• 2015

This study is to review the historical documents about Cinnamomum camphora SIEB. in Goryeo and Joseon Dynasty. First of all, we defined it's feature and used case by the most appropriate word 'Jang(樟)' meaning Cinnamomum camphora SIEB. We also discovered some illusions and should suggest a new possibility. First, we analyzed the definition and examples of Cinnamomum camphora SIEB. and come to the conclusion that 'Jang(樟)' seems to be the most appropriate word. Second, we confirmed that Cinnamomum camphora SIEB. grew in extralimital area. It is believed that it's because of making a mistake. Third, we confirmed that it is confused Cinnamomum camphora SIEB. with Koelreuteria paniculata in Yi, Gyu-Gyeong's records. However, it's required to verify the other cases of the Cinnamomum camphora SIEB.'s records. We expect a follow-up study about it by classifying modern feature and comparing literature matching.

• Journal of agriculture & life science
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• v.46 no.5
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• pp.25-35
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• 2012

This study was carried out to classify the folk plants in Ulleung island. According to the survey results from 553 sheets of 55 residents at 20 places from march 2009 to september 2010, the folk plants in Ulleung island consisted of a total 113 taxa; 51 families, 93 genera, 98 species, 2 subspecies and 13 varieties. Among the investigated 113 taxa; 5 Korean endemic plants, 14 rare plants and 5 naturalized plants were also included. The use by usage of 113 taxa was; 72 as medicinal, 65 as edible, 5 as ornamental, etc., respectively, so the medicinal use is the highest. The most useful part was leaf, followed by fruit and root. The consistency comparison between the korean name and the local name were the highest in the people in 40's and the lowest in those in 70's.

• Asian Journal of Turfgrass Science
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• v.15 no.3
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• pp.111-118
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• 2001

We observed air temperature and relative humidity in the green space why this research graspes effect of climate relax by coverage condition and height difference tree in green space of the 4ha scale. With this data, analyzed relationship of coverage and air temperature or relative humidity distribution, number of tree and climate relax by revolution analysis. In this result, higher zone formed barren area, lower zone did forest and surround grassland. Relative humidity have corresponding type of air temperature distribution. higher air temperature zone was lower humidity and lower zone was higher humidity. Coverage condition effect climate relax by increasing forest and grassland. and increasing number of tree effect climate relax no related hight of tree. This efficiency order of an arbor, subarbor.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.36 no.2
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• pp.21-29
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• 2018

This study was wanted to select a value evaluation item to maintain the authenticity of the Planting Landscape in Hahoe and Yangdong villages. Above all, after checking the suitability of the 43 selected items by the Focus Group Interview, the weight was calculated in the Analytic Hierarchy Process expert questionnaire to establish the importance of the indicators for the development of the assessment items. The expert analysis analyzed the importance of 2 sections, 6 divisions and 11 detailed categories, and summarized the results of the study as follows : First, the comparative importance of each category and selection of the assessment items for the stabilization of the Planting Landscape of Hahoe and Yangdong indicated that cultural values are more important than biological values. In particular, details of the biological values of trees were derived with relatively low estimates, except for the specific characteristics of species and items of type of tree. Second, as a result of verification of the suitability of the 43 items selected by the Focus Group Interview, the source diameter, the collection width, reception, flushing, supersonality, records, memorials, 11 items were selected, Third, the results of the importance evaluation of the value properties for maintaining the resistance of vegetation through the Analytic Hierarchy Process were : specific in biological values (0.187), steady (0.094), and water pipe width (2007). There was relatively little difference in the highest weights, the width of the pipe except for the lowest value received, and the source diameter flushing. Fourth, the results of an evaluation of the importance of a value property aimed at historical values were whether or not the cultural asset was designated (0.134), the record value (0.092), the time (0.088), and the monument (0.063). In terms of the importance of evaluating the historical values of Planting sites consisting of Hahoe and Yangdong, the importance of designation of cultural properties was considered to be relative to the maintenance of the Planting Landscape including culture and history. Based on the assessment items and weighted values of the Planting Landscape of Yangdong Village and the World Cultural Heritage below and below, this study's Analytic Hierarchy Process can be applied to actual criteria for the assessment of the authenticity of trees in the village. Based on the assessment items and weighted values of the Planting Landscape in Hahoe and Yangdong villages, a follow-up study on the assessment standards for the authenticity of trees in the village will be left as a future task.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.493-493
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• 2022

본 연구는 식생밀도와 흐름에 따른 수치모형(Nays2D) 하상변동 모의 결과를 서식처 적합도 분석 모델(PHABSIM:Phsical Habtiat Suitability Model)의 입력자료로 활용하여, 식생밀도에 따른 하상 지형 변화가 어류 서식처 적합도에 미치는 영향을 검토한다. 금강 부용리 인근 2km를 대상으로 2차원 모형인 Nays2D를 적용하여 흐름(댐 방류량, 2년 빈도 유량, 100년 빈도 유량 등)과 식생밀도(식생미반영, 현재 밀도, 밀도 감소, 밀도 증가 등)에 따른 하상변동 모의를 실시하였고, 모의 결과값(단면 표고, 유속, 수위)을 물리적 서식처 평가 모델인 PHABSIM의 입력자료로 활용하였다. 피라미 서식을 위한 적정 유속과 수심의 서식처 적합도 지수를 이용하여 각 시나리오 별가중가용면적(WUA: Weighted Usable Area)을 산정하여 비교 분석하여, 식생밀도에 따른 단면 구조의 변화가 WUA 면적과 피라미 서식처 적합도에 어떻게 영향을 미치는지 검토하였다. 그 결과, 수목 밀도를 미반영한 하상변동 모의 결과를 PHABSIM의 입력 자료로 활용하였을 때 가중가용면적이 가장 높았고, 식생 밀도를 증가시킨 하상변동 모의 결과를 입력 자료로 활용하였을 때 WUA값이 가장 낮게 나타났다. 이는 피라미의 서식처 적합도 측면에서 식생이 적어 특정 유량에 따른 하상변동의 폭이 커지면서 저수로 최저하상과 고수부 하상과의 표고차가 상대적으로 낮은 하상 단면이 피라미의 서식처 측면에서 유리할 가능성이 있음을 시사한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.595-601
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• 2020

During the safety inspection of nitrocellulose-made explosive containers stored for more than 10 years, cracks were found in the containers. Therefore, a failure cause analysis test was performed. First, the cause of failure through the failure tree analysis was conducted to select the factors that influenced failure. The changes in the properties of the container caused by the acceleration of the reaction were found to be the cause of the failure by confirming the influence on the environment and internal/external factors that may occur during storage. To confirm this, environmental tests, such as thermal shock test and vacuum thermal stability test, were performed using a naturally aged container to analyze the cause of failure, and an accelerated aging test was performed to reproduce the failure. Through this, the chemical reaction was accelerated by heat and charge, as in the result of the fault tree analysis, and it was confirmed that the physical properties of the container were changed. In addition, the service life of the container was estimated using the Arrhenius model for the storage life due to thermal aging.

• Korean Journal of Environment and Ecology
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• v.34 no.6
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• pp.558-572
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• 2020

The purpose of this study was to classify the types of degraded areas of Mt. Jirisan section in Baekdudaegan and survey the actual condition of each damage type to use it as basic data for the direction of the restoration of damaged areas according to damage type based on the vegetation information of reference ecosystem. The analysis of the Mt. Jirisan section's actual degraded conditions showed that the total number of patches of degraded areas was 57, and the number of patches and size of degraded areas was higher at the low average altitude and gentle slope. Grasslands (deserted lands) and cultivated areas accounted for a high portion of the damage types, indicating that agricultural land use was a major damage factor. The survey on the conditions of 14 degraded areas showed that the types of damage were classified into the grassland, cultivated area, restoration area, logged-off land, and bare ground. The analysis of the degree of disturbance (the ratio of annual and biennial herb, urbanized index, and disturbance index) by each type showed that the simple single-layer vegetation structure mostly composed of the herbaceous and the degree of disturbance were high in the grassland and cultivated land. The double-layer vegetation structure appeared in the restoration area where the pine seedlings were planted, and the inflow of naturalized plants was especially high compared to other degraded areas due to disturbances caused by the restoration project and the nearby hiking trails. Although the inflow of naturalized plants was low because of high altitude in bare ground, the proportion of annual and biennial herb was high, indicating that all surveyed degraded areas were in early succession stages. The stand ordination by type of damage showed the restoration area on the I-axis, cultivated area, grassland, logged-off land, and bare ground in that order, indicating the arrangement by the damage type. Moreover, the stand ordination of the degraded areas and reference ecosystem based on floristic variation showed a clear difference in species composition. This study diagnosed the status of each damage type based on the reference ecosystem information according to the ecological restoration procedure and confirmed the difference in species composition between the diagnosis result and the reference ecosystem. These findings can be useful basic data for establishing the restoration goal and direction in the future.

• Korean Journal of Environment and Ecology
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• v.35 no.2
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• pp.126-134
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• 2021

It is necessary to set a management period by analyzing growth trends for individual species because the time taken for planted trees to become established differs by species. The purpose of this study was to suggest an appropriate management period through the analysis of the annual growth of Pinus densiflora planted in the riverine eco belt. The average annual growth before planting was 0.6cm. The growth after planting showed an increase of 0.3cm in the 1st and 2nd year, 0.5cm in the 3rd and 4th year, and 0.7cm after the 5th year. Since P. densiflora was confirmed to go through poor growth stages in the 1st and 2nd year, a recovery stage in the 3rd and 4th year, and a normal growth stage in the 5th year, management should pay more attention to improve inappropriate environmental conditions until at least the 4th year, unlike the growth of hardwood. Since the period required for activation by species may vary, the management period of each species will need to be set through growth research.

• Korean Journal of Environment and Ecology
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• v.35 no.3
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• pp.294-304
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• 2021

This study aims to obtain basic data for systematic restoration by analyzing the monitoring results of the Shimwon Valley Ecological Landscape Restoration Project area in Jirisan National Park. In 2017, when the restoration project was completed, 12 monitoring plots and 4 control plots were installed for vegetation monitoring, and changes in the relative dominance, species diversity index and similarity between 2017 and 2020 were analyzed. The species diversity index of the surveyed areas where trees were planted during the restoration project was 0-1.4552, and the similarity index with the control group was 0% except for one survey area at 1.32%. The very low species diversity index and similarity index in the survey areas were attributed to the loss of trees planted during the restoration project due to death, damage by wild boars, or erosion by running water. On the other hand, the species diversity index was 0.9538-2.3222 in the monitoring plot where no tree was planted, and the similarity index was analyzed to be as high as 8.33%. It is necessary to continue the long-term monitoring for the development of ecological landscape restoration methods in the national park and analysis of the succession in monitoring plots where no trees were planted.