• Korean Journal of Agricultural and Forest Meteorology
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• v.4 no.4
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• pp.213-218
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• 2002

The use of biological indicator for environmental monitoring has suddenly become popular in many international organizations as well as domestic ones. Since the biological indicator species should be well responsive to native environmental change, development of native indicator species is prerequisite for environmental assessment and restoration program. Through regression analysis of mean density and pH, potential indicator species were screened from Namsan and Kwangreung where differential environmental stresses are influenced; Lasiobelba remota, Ceratozetes sp. Tectocepheus velatus, Neogymnobates sp. and Oppia sp.3. Also keystone species in two study area were Lohmannia coreana, Ceratozetes sp., Rostrozetes pulcherrimus, and Lasiobelba remota in Namsan Deciduous forest and Neogymnobates sp., Neogymnobates donghaksaensis, and Cultroribula tridentata in Kwangreung. Advantages and disadvantages of using biological indicator for environmental monitoring were further discussed.

• Korean Journal of Remote Sensing
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• v.30 no.2
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• pp.207-218
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• 2014

The information on the land cover along stream corridor is important for stream restoration and maintenance activities. This study aims to review the different classification methods for mapping the status of stream corridors in Seom River using airborne RGB and CIR digital ortho imagery with a ground pixel resolution of 0.2m. The maximum likelihood classification, minimum distance classification, parallelepiped classification, mahalanobis distance classification algorithms were performed with regard to the improvement methods, the skewed data for training classifiers and filtering technique. From these results follows that, in aerial image classification, Maximum likelihood classification gave results the highest classification accuracy and the CIR image showed comparatively high precision.

• Applied Chemistry for Engineering
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• v.27 no.3
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• pp.330-334
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• 2016

Because several wood barks are massively produced in the forest area of Chungbuk province, it is required to develop technologies for their effective utilization. In this study, three kinds of barks from Robina pseudoacacie, Pinus densiflora, and Castanea crenata were used to remove water-soluble cadmium ions having 10, 20, 50, and 100 mg/L concentrations in each batch experiments, and R. pseudoacacie bark was selected as the most excellent biosorbent. Also, treatments with various acids and bases were performed to increase the removal efficiency of 100 mg/L cadmium ions using R. pseudoacacie bark as a biosorbent. When R. pseudoacacie bark was modified with 0.5 M KOH, the relatively high removal efficiency and adsorption amount of cadmium ions were obtained. In addition, when 9 M KOH-treated R. pseudoacacie bark was used for 30 min, the highest removal efficiency of 100 mg/L cadmium ions was 84.3%. Therefore, this experimental result can be effectively used as an environmental-friendly bioremediation technology to remove cadmium ions existed with various concentrations in water bodies and soils.

• Korean Journal of Agricultural and Forest Meteorology
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• v.6 no.1
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• pp.1-10
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• 2004

The climate of Minamiakikawa forest in Japan is similar to that of Mt. Jiri in South Korea. There is a large development plan for Minamiakikawa forest, and a change in the species composition is expected. This study was initiated to compare forest transition caused by artificial perturbations in Korea and Japan. Long-term field observations on species composition are reported. We found 98 families, 231 genera, 315 species, 29 varieties, and 8 races, making a total of 352 classification groups of higher plants in the Minamiakikawa forest area. Among them, 11 families, 12 species and 2 varieties are rare or endangered. The study area is dominated by Cryptomerica japonica and Chamaecyparis obtusa. The time and restoration effects on secondary and latent forestation consider the development of the Quercus mongolica community, the Quercus serrata community, and deciduous-broadleaved tree ascension. This indicates that the forest has been restored to Abies firma, Pinus densiflora or Cryptomeria japonica and Fagus japonica, which is considered latent natural forestation of the area in a natural transfer.

• Journal of Wetlands Research
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• v.13 no.2
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• pp.199-208
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• 2011

Scarcity of water worldwide, increasing greenhouse gas emissions, increased energy consumption due to the Earth is threatened. Existing in the process of urban planning and development of forests, rivers and other natural ecosystems have been destroyed and that there was increased impervious pavement. Impervious pavement increase water circulation system to destroy the natural and urban water retention, infiltration and decreased evaporation. Nonpoint source pollution(NPS) occurs when rainfall impervious pavement and appeal directly to the river water inflow is adversely impacts of the situation. In this study, rainfall occurs impervious pavement NPS pollution reduction and temperature increase due to the increase in urban areas, and to solve heat island phenomenon is to develop small HSSF constructed wetland technology. The small HSSF constructed wetland sedimentation, filtration, adsorption, absorption by vegetation, including such mechanisms. Techniques for verification of the pilot-scale test was conducted. In the future domestic urban heat island phenomenon and restore the natural water cycle for the facilities will be used as a basis to develop.

• Journal of the Korean Geographical Society
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• v.51 no.6
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• pp.761-777
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• 2016

This study is to suggest landform and environmental problems of border region of N. Korea and China by analyzing results of field work for the Dumangang and the Amnokgang from year 2000 up to year 2016. By the social system in North korea, access of study material is possible with satellite image and published statistical data, but impossible direct data collection. We gathered field work data on landform and environment in border Region of N. Korea and China. Before field survey, we analysed geometrical landform and geology using DEM and digital geology map. We analyzed landform and environmental problems occurring in upper, midstream, and downstream region of the Dumangang and the Amnokgang using field work data. Resultingly, this study will be expected to support as basic data for resonable management on natural resources and empirical research activities on North Korea.

• Korean Journal of Environment and Ecology
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• v.27 no.1
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• pp.1-10
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• 2013

The habitats characteristics of Wedelia prostrata were investigated to compile basic data for conservation and restoration. Natural habitats were located at inclinations of $1-40^{\circ}$. Thirty eight vascular plants were identified from 19 quadrats in 7 habitats. The importance value of Wedelia prostrata is 44.77% and 5 highly ranked species such as Vitex rotundifolia(13.32%), Carex pumila(6.75%), Calystegia soldnella(4.24%), Aster hispidus(2.54%) and Artemisa capillaris(2.43%) are considered to be an affinity with Wedelia prostrata in their habitats. Species diversity was 0.79, and dominance and evenness were found to be 0.25 and 0.67, respectively. Average field capacity was 4.51%, the organic matter was 3.37%, pH was 8.17, available phosphorus was $1.33{\mu}g/g$, and electrical conductivity was $802.01{\mu}s/cm$.

• Proceedings of the Korean Information Science Society Conference
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• 2010.06b
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• pp.289-293
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• 2010

21C 현대 문명사회에서는 도시의 고밀도 및 팽창으로 인하여 도시 내 생태계가 파괴되면서 생물서식처의 환경 악화 및 엄청난 감소가 초래되었으며, 그 결과로 인하여 인간과 생물이 접촉할 수 있는 공간이 현저하게 줄어들고 있다. 또한 도시 영역의 확장을 위하여 산림 및 녹지의 감소, 녹지의 분절 및 단절화, 해안 매립 등이 계획 없이 무분별하게 진행됨으로써, 각종 동식물의 개체 수 감소 및 토양의 건조화 등이 발생하고 있으며, 그 영향으로 생물종의 다양성이 떨어지고, 도시 생태계의 교란이 심해지고 있다. 이러한 도시 생태계의 교란은 도시에 거주하고 있는 시민들의 생활의 질이 떨어지게 하고 많은 환경 문제들의 주원인이 되고 있다. 지속적이면서도 자연친화적인 도시발전을 위해서는 도시 내 자연생태계를 회복하고 생물서식공간을 종합적으로 보전하면서 복원해야 한다는 요구가 높아지고 있지만, 이를 체계적으로 이루기 위한 방법론의 부재에 시달리고 있었다. 이러한 가운데 유럽을 중심으로 생겨난 비오톱(Biotope)과 비오톱 지도화 방법이 생태계를 보전하며, 시민들에게 다양한 자연체험과 휴양 기회를 제공하고 친환경적인 도시계획을 위한 핵심적인 역할을 하는 것으로 인식되고 있다. 하지만, 기존의 비오톱 지도는 이미지 기반의 2차원 지도로 제공되고 있어, 거리 및 공간 분석에 취약하고 정보전달력이 부족하여, 익숙한 전문가가 아닌 경우 비오톱을 이해하는데 상당한 정도의 시간이 필요하였다. 이에 본 논문에서는 공간정보가 결여된 2차원 형태의 GIS 데이터를 기반으로 3차원 공간 데이터를 자동으로 생성하고, 위성영상과 DEM(Digital Elevation Model)을 이용하여 3차원 지형을 만들어 각 주제도별로 입체적인 분석이 가능하도록 하였다. 또한 동영상 녹화 기능과 3차원 객체 추가 기능을 이용하여, 자연생태계를 고려한 도시의 설계를 진행하는 경우 3차원적인 모델링을 제공함으로써 효과적이면서도 사용자의 이해도를 향상 시킬 수 있는 정보 전달력을 가질 수 있도록 설계 및 구현하였다.

• Korean Journal of Remote Sensing
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• v.37 no.5_1
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• pp.939-946
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• 2021

Monitoring of post wildfire provides important information for vegetation restoration. In particular, remote sensing data are known to provide useful information necessary for monitoring. However, there are insufficient research results which is monitoring the vegetation recovery using remote sensing data. This study is directed to monitoring post-wildfire vegetation restoration. It proposes a method for monitoring vegetation restoration using Sentinel-2 satellite data by compositing Tasseled Cap linear regression trend in a post wildfire study sites. Although it is a simple visualization technique using satellite images, it was able to confirm the possibility of effective monitoring.

• Journal of Environmental Science International
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• v.31 no.5
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• pp.389-404
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• 2022

The purpose of this study is to evaluate the vegetation recovery status of Mudeungsan National Park Jungmeorijae, Jeungsimsa district restoration site, and the Shimwon Valley ecological landscape restoration site in Jirisan National Park. Compared to the control plots, the Jungmeorijae restoration site was analyzed to have height growth of about 73.5%, the average species diversity index of about 75.2%. and the average similarity index was recovered to 7.75%. In the case of the restoration site in Jeungsimsa district, the height growth compared to the control plots was about 69.2%, the average species diversity index was about 55.0%. and the average similarity index was recovered to 25.65%. In the case of the Shimwon Valley ecological landscape restoration area, the height growth compared to the control plots was about 32.6%, the average species diversity index about 176.7%. and the average similarity index was recovered to 0.85%. The restoration site of the Jeungsimsa district was planted with relatively large trees during restoration work, and it took a relatively long time(20 years). Also, the site had less limiting factors due to the low elevation, allowing the degree of vegetation recovery to be higher than that of other sites.