• Proceedings of the KSEG Conference
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• 2004.03a
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• pp.25001-25035
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• 2004

석재의 무분별한 개발로 인한 산림훼손을 최소화하고 상품성 있는 석재 가능성을 확인하기 위하여 채석허가 이전에 지질조사 및 시추탐사를 통한 매장량과 경제성 등 채석타당성을 평가하는 것이 필요하다. 골재가 부존하는 충적층은 다양한 입도와 지층 단면을 가지고 있기 때문에 이를 대상으로 골재를 채취하려면 골재의 품질과 매장량을 확인해야 한다. 또한 무분별한 골재 채취는 홍수시 유량과 유속을 변경시키므로 합리적인 채취량을 추산할 필요가 있다. (중략)

• Proceedings of the KSEEG Conference
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• 2005.04a
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• pp.350-353
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• 2005

• Journal of Korean Society of Forest Science
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• v.110 no.3
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• pp.419-430
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• 2021

This study investigated spatiotemporal trends of sediment-related disasters in North Korea from 1960 to 2019 and post-disaster recovery cases based on a literature review and satellite images. Results showed that occurrence status of sediment-related disasters was initially externally reported in 1995 (during the Kim Jongil era); their main triggering factor was heavy summer rainfall. Furthermore, forest degradation rate was positively correlated with population density (R² = 0.4347, p = 0.02) and occurrence number of sediment-related disasters was relatively high on the west coast region, where both variables showed high values. This indicates that human activity was a major cause of forest degradation and thus, significantly affected sediment-related disasters in mountain regions. Finally, sediment- related disasters due to shallow landslides, debris flow, and slow-moving landslides were observed in undisturbed forest regions and human-impacted forest regions, including terraced fields, opencast mines, forest roads, and post-wildfire areas, via satellite image analysis. These disaster-hit areas remained mostly abandoned without any recovery works, whereas hillside erosion control work (e.g., treeplanting with terracing) or torrent erosion control work (e.g., check dam, debris flow guide bank) were implemented in certain areas. These findings can provide reference information to expand inter-Korean exchange and cooperation in forest rehabilitation and erosion control works of North Korea.

• Korean Journal of Environment and Ecology
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• v.15 no.1
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• pp.69-78
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• 2001

본 연구는 지리산국립공원 아고산대 훼손지에서 식생복원 효과를 구명하기 위하여 야생풀포기심기, 개량토포설, 환경피해도 요인을 고려하여 입지환경이 다른 2개 대상지에 실험구를 설치한 후 4년(1997년~2000년) 동안 식생피복도와 종다양성을 조사. 분석하였다. 신림지대와 초원지대에서의 복원실험은 야생풀포기이식, 개량토포설, 환경피해도 요인간 상호작용효과는 없었으나, 야생풀포기이식 처리수준간에는 고도의 유의한 차이가 인정되었다. 국립공원 능선부 훼손지의 식생복원 실험 결과 토양이 습한 산림지대에서는 야생풀포기이식 15%피복 처리수준에서 2년안에 식생피복이 이루어졌고, 종다양성은 3년만에 복원되었다. 또한 무처리구에서 3년안에 식생피복이 이루어졌으나, 종다양성은 복원되지 않았다. 바람이 많고, 토양침식이 심한 능선부 초원지대에서는 3년후에 야행풀포기이식과 30% 피복 처리수준에서 식생피복이 양호하게 이루어졌으며, 종다양성은 복원되지 않았다.

• Journal of Korean Society of Forest Science
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• v.99 no.6
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• pp.777-784
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• 2010

The purpose of this study was to develop evaluation indices for forest landscape classification. The indices were chosen to enable forest managers to establish effective landscape management strategies through three times of focus group interviews and email survey with experts. The 13 landscape evaluation indices were finally divided into four categories. They were ecological health (degree of green naturality, degree of ecological naturality, disease and insect damage, crown vitality), aesthetic visual quality (naturalness, harmony, diversity, traditionality, aesthetic appreciation, rarity), and sensitivity (level of tourism/recreational use), interruptions (damaged land, artificial structures). The five-level was suggested for the forest landscape classification system.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.434-435
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• 2006

154kV 변전소 건설시 표준규모로 조상설비 설치공간을 확보하고 있으나 표준용량대비 초과설치가 필요하거나 기설 구형변전소에 조상설비를 설치하기 위해서는 옥외설치를 위한 추가 부지 확보가 반드시 요구된다. 하지만 산림훼손 최소화, 부지매수비용과다 등 변전소부지 확보가 한층 더 어려워진 현 여건을 감안할 때 전력용 콘덴서 설치를 위한 추가부지 확보는 곤란한 상황이다. 더욱이 도심지나 주택가 인근 변전소에 조상설비를 설치할 경우 옥외설치에 따른 소음발생, 미관훼손 등으로 인해 각종 민원이 끊이지 않는 실정이다. 이러한 문제점을 개선하기 위하여 설치면적을 최소화할 수 있는 조상설비를 개발하여 효율적으로 기기를 배치함으로써 건설예산을 절감하고 기술진보에 따른 변전설비의 소형화, 집적화, 자동화 추세에 부응하여 전력용 콘덴서 설비를 획기적으로 개선함으로써 도심지 및 주택가 인근 옥외 설치 시 발생되는 민원을 예방함과 동시에 설비운전의 안전성을 확보하고자 하였다. 이에 따라 설치면적 최소화, 미관 개선, 설비 신뢰도 및 안전성 향상을 목적으로 전력용 콘덴서 뱅크 구성에 필요한 각종 기기를 수납한 방재밀폐형 개폐장치부 전력용 콘덴서를 개발 추진하게 되었다.

• Korean Journal of Environment and Ecology
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• v.29 no.6
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• pp.923-928
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• 2015

This study was carried out to evaluate the physicochemical properties of different types of topsoil in forest ecosystems by damage pattern and analyse the possibility of using the topsoil as a planting ground construction material. There were 72 samples from 36 sites of 12 damaged areas and 36 sites of 12 non-damaged areas. The results showed that the physicochemical properties of topsoil from non-damaged areas of forest ecosystems were on an average clay loam~sandy loam in soil texture, showing $0.95{\sim}1.10Mg/m^3$ in soil bulk density, $35.7{\sim}44.0m^3/m^3$ in solid phase, 56.0~64.3 in soil porosity, 8.4~35.8% in aggregate stability, 5~13 mm in soil hardness, 5.3~6.1 in pH, 0.14~0.65 dS/m in EC, 0.28~0.42% in T-N, $14{\sim}22cmol^+/kg$ in CEC, $0.15{\sim}0.31cmol^+/kg$ in Ex. $K^+$, $2.07{\sim}2.84cmol^+/kg$ in Ex. $Ca^{2+}$, $0.45{\sim}1.97cmol^+/kg$ in Ex. $Mg^{2+}$, 17~96 mg/kg in Av. $P_2O_5$ and 3.2~5.6% in OM. On the other hand, damaged areas were on an average clay loam~loamy sand in soil texture, showing $1.54{\sim}1.75Mg/m^3$ in soil bulk density, $52.8{\sim}58.0m^3/m^3$ in solid phase, 42.0~47.2 in soil porosity, 4.2~22.5% in aggregate stability, 13~25 mm in soil hardness, 4.8~5.5 in pH, 0.13~0.62 dS/m in EC, 0.02~0.12% in T-N, $5{\sim}15cmol^+/kg$ in CEC, $0.11{\sim}0.18cmol^+/kg$ in Ex. $K^+$, $0.45{\sim}2.36cmol^+/kg$ in Ex. $Ca^{2+}$, $0.39{\sim}0.96cmol^+/kg$ in Ex. $Mg^{2+}$, 15~257 mg/kg in Av. $P_2O_5$ and 0.4~2.2% in OM. After conducting a comparison of physicochemical characteristics of non-damaged forest area and damaged areas, it was found that the physicochemical characteristics of damaged areas were more deteriorated compared to that of non-damaged areas. Therefore, it is judged that it is necessary to establish countermeasures for the conservation and management of the damaged areas for topsoil recycling in the future.

• Journal of Environmental Impact Assessment
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• v.31 no.6
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• pp.423-437
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• 2022

Parts of damaged trees are being transplanted in accordance with the Environmental Impact Assessment Manual. Problems such as death or poor growth are constantly being addressed in the process of transplanting trees from the forest they originally inhabited to temporary and final transplant sites. The purpose of this study is to analyze the differences in soil properties in the surrounding forest, the temporary transplant site, and the construction site and to suggest methods for improving the soil to make it suitable for the growth of transplanted trees. For 10 development projects, 2 soil samples were sampled from the surrounding forest, temporary transplant site, and construction site. A total of 60 soil samples were analyzed for physical and chemical properties. Among the physical properties such as coefficient of permeability, available moisture, and hardness, and chemical properties such as acidity, organic matter content, total nitrogen, and available P showed significant differences among groups. The soil of the construction site is harder than the surrounding forest because of construction equipments, the coefficient of permeability is higherthan the surrounding forest because of high sand content, and the available moisture was low. It does not retain the moisture necessary for plants in the soil and drains immediately. It is necessary to implement tillage to improve the physical properties and structure of the soil. In addition, it is necessary to cover the surface with wood chips or fallen leaves after adding mature organic matter to improve the physical and chemical properties of the soil together.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.04a
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• pp.139-144
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• 2003

수종, 영급, 밀도 등과 같은 산림의 특성을 나타내는 임상구분은 주로 항공사진 육안판독을 통하여 이루어져 왔다. 최근 항공사진과 유사한 공간해상도를 갖춘 고해상도 위성영상이 제공되면서 이를 이용한 임상구분의 가능성에 대한 관심이 높아지고 있다. 본 연구에서는 울산 인근 산림지역의 1m 공간해상도의 IKONOS 입체쌍 영상을 이용하여 임상 판독의 가능성을 분석하였다. IKONOS영상은 기존의 수치임상도와의 중첩을 위하여 수치고도자료(DEM)를 이용한 정사보정을 수행하였으며, 분광밴드의 조합을 통한 칼라영상을 이용하여 육안판독을 시도하였다. 육안판독결과 IKONOS 칼라합성영상에서 천연 소나무림과 활엽수림의 육안구분이 흑백항공사진에 비해 뚜렷하게 나타나는 것을 볼 수 있었으며, 임분의 밀도가 영상에서 나타나는 질감과 패턴의 차이로 구분이 가능하였다. 또한 기존의 임상도를 중첩하여 최근 산지개발, 산불 등으로 훼손된 지점에 대한 구분이 용이하기 때문에 기존의 수치임상도를 화연상에서 직접 갱신함으로써 최근의 산림현황정보의 유지를 하는데 적합한 것으로 나타났다.

• Journal of Korean Society for Geospatial Information Science
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• v.21 no.3
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• pp.11-17
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• 2013

With high social demands for the diverse utilizations of forest lands, the illegal forest land use changes have increased. We studied change detection technique to detect changes in forest land use using an object-oriented segmentation of RED bands differencing in multi-temporal aerial photographs. The new object-oriented segmentation method consists of the 5 steps, "Image Composite - Segmentation - Reshaping - Noise Remover - Change Detection". The method enabled extraction of deforested objects by selecting a suitable threshold to determine whether the objects was divided or merged, based on the relations between the objects, spectral characteristics and contextual information from multi-temporal aerial photographs. The results found that the object-oriented segmentation method detected 12% of changes in forest land use, with 96% of the average detection accuracy compared by visual interpretation. Therefore this research showed that the spatial data by the object-oriented segmentation method can be complementary to the one by a visual interpretation method, and proved the possibility of automatically detecting and extracting changes in forest land use from multi-temporal aerial photographs.