• 한국산림과학회지
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• 제94권6호
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• pp.377-386
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• 2005

김해시 상동면 매리 산사태지의 발생특성을 밝히기 위한 일련의 연구를 진행중에 있으며, 본보에서는 지반조사, 시추공내영상촬영, 탄성파탐사 및 실내시험 후 안정해석을 실시하였다. 안정해석결과, 영역 I 지역은 집중호우 시 땅밀림 산사태가 발생될 위험이 있으므로 계측기를 설치하여 지표의 변위발생을 모니터링하고, 변위가 발생될 경우 긴급복구가 필요한 지역으로 판단된다. 영역 II는 토사유실이 장기간 지속될 경우 붕괴(slope failure)가 예상되므로, 향후 지속적인 관찰과 보수가 필요할 것으로 사료된다. 영역 Ill은 상부로부터 집수되는 지표수 배제 및 상부 너덜(talus)지역으로부터 침투된 지하수의 배제를 위한 시공이 필요할 것으로 사료된다. 영역 IV는 현재 안정한 지역으로 가능하면 절취 등 훼손이 발생하지 않도록 하는 것이 바람직할 것이다.

• 한국산림과학회지
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• 제108권3호
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• pp.454-467
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• 2019

이 연구는 산지를 이용한 산지경관 파편화 모니터링을 제안하고 실효성을 검토하여 다음의 결과를 도출하였다. 첫째, 산지경관이 최근 9년간 빠르게 파편화되고 있어서 국가적 모니터링과 관리가 시급하다. 둘째, 산지경관(GIS) 기반의 평면적 파편화 조사만으로는 중요한 생태적 변화를 확인할 수 없으므로 다양한 조사체계와의 연계가 필요하다. 셋째, 산지경관 파편화 모니터링을 환경영향평가 재해영향평가 등과 연계하여 사전예방원칙을 제도화해야 한다.

• 한국환경복원기술학회지
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• 제5권3호
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• pp.50-57
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• 2002

The restoration techniques of large disturbed land containing native forest resources and soil animals were investigated on the new campus area of Kyushu University in Japan. Important techniques to restore native forest and biodiversity in that area are transplantation of existing large trees, transplantation of the forest soil, transplantation of native tree stools, and the reuse of wood and bamboo chips. The benefits can be obtained by using these methods. Firstly, the native genetic resources that would be discarded as part of the land development can be reused. Secondary, the time taken to become a high growth forest as opposed to the practice of planting saplings or grass seeds can be reduced. At last, the native forest ecosystem containing various under-story vegetations and soil animals can be conserved and regenerated. In addition, big and small ponds were constructed in the biodiversity preservation zone to preserve rare plants, rare animals, and native aquatic animals. And these plants and animals were transplanted and moved to ponds.

• 환경영향평가
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• 제14권6호
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• pp.387-402
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• 2005

In this study, we tried to predict the change of future land-cover and relationships between land-cover change and geo-spatial information in the Gongju area by using fuzzy logic operation. Quantitative evaluation of prediction models was carried out using a prediction rate curve using. Based on the analysis of correlations between the geo-spatial information and land-cover change, the class with the highest correlation was extracted. Fuzzy operations were used to predict land-cover change and determine the land-cover prediction maps that were the most suitable. It was predicted that in urban areas, the urban expansion of old and new towns would occur centering on the Gem-river, and that urbanization of areas along the interchange and national roads would also expand. Among agricultural areas, areas adjacent to national roads connected to small tributaries of the Gem-river and neighboring areas would likely experience changes. Most of the forest areas are located in southeast and from this result we can guess why the wide chestnut-tree cultivation complex is located in these areas and the possibility of forest damage is very high. As a result of validation using the prediction rate curve, it was indicated that among fuzzy operators, the maximum fuzzy operator was the most suitable for analyzing land-cover change in urban and agricultural areas. Other fuzzy operators resulted in the similar prediction capabilities. However, in the prediction rate curve of integrated models for land-cover prediction in the forest areas, most fuzzy operators resulted in poorer prediction capabilities. Thus, it is necessary to apply new thematic maps or prediction models in connection with the effective prediction of changes in the forest areas.

• 한국환경복원기술학회지
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• 제14권6호
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• pp.119-130
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• 2011

Land-use changes have made considerable impacts on humans and nature such as biodiversity and ecosystem services. It is recognized as important elements for land use planning and regional natural resources conservation to identify the major causes of land use changes and to predict a process of changes and effects. This study, by using a spatially explicit Dyna-CLUE model, analyzed correlations between driving factors, quantified location characteristics of different land use types using logistic regression analysis and examined future land use changes and its effects in Yangpyeong and Yeoju region. We expected land use changes based on the three scenarios with different future land demands and simulated future changes for spatial variations of land use for the 20 years. The outcomes shows that larger change was found in agricultural areas than forest areas, based on the change in built-up areas. The changes in forest areas, which were mainly occurred in edge area, were expected to affect a large impact on its ecotone. It was found to be the importance of the management of forest edge and the necessity of the environmentally sound and sustainable development in order to conserve natural resources of the region.

• 한국산학기술학회논문지
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• 제19권11호
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• pp.481-487
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• 2018

땅밀림 피해지에서 피해지점 및 균열 탐지, 피해규모를 효율적으로 분석하기 위해서 무인기를 활용한 피해지 탐지 및 모니터링 방안에 대해 본 연구에서 제시하였다. 땅밀림 피해지에서 무인기를 촬영하고 분석한 결과, 정사영상을 구축하면 피해지의 균열 탐지 및 규모를 파악할 수 있기 때문에 현장조사 전에 조사자 안전을 확보하고, 조사계획 수립에 효율적 활용이 가능하였다. 또한, 정사영상에서 지형정보를 추출하면 땅밀림 피해지 균열에 대한 정량적 분석이 가능하였다. 본 연구에서 시범적으로 적용한 대상지에서는 전체 균열 면적 1.01ha, 길이 1.07km, 평균 폭 10m, 단차범위 1~10m로 땅밀림 피해가 발생한 것으로 나타났다. 땅밀림 피해지에서는 정기적인 무인기 촬영을 통하여 지형변위를 탐지하고 피해 확산 방향, 규모 등에 대한 모니터링이 가능하기 때문에 복구계획 수립에 효율적으로 활용할 수 있다. 무인기를 이용하여 땅밀림 피해지에 시험 적용한 결과, 지형이 험준하고 위험한 산지에서 빠르고 쉽게 정성적 정량적 결과를 획득할 수 있는 장점이 있었다. 산사태, 토석류, 땅밀림과 같은 산지토사재해 현장에서 무인기 활용가치가 높기 때문에 관련 산업분야 발전에 기여할 수 있을 것으로 기대된다.

• 한국산림과학회지
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• 제101권2호
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• pp.220-225
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• 2012

산지소유역에 있어서 밤나무림, 소나무림, 개벌조림지로 이용되고 있는 산림을 대상으로 임분별 유출토사량과 토사유출에 영향을 미치는 인자를 구명하기 위하여 분석한 결과를 요약하면 다음과 같다. 임분별 유출토사량 변화를 살펴보면 개벌조림지, 밤나무림, 소나무림 순으로 나타나 임분별 차이를 알 수 있었다. 임분별 유출토사량과 누적강우량간 선형회귀식의 설명력($R^2$)은 밤나무림 70%, 소나무림 60%, 개벌조림지 60%로서 비교적 높게 나타났다. 임분별 유출토사량과 환경인자간의 상관성을 분석한 결과 경사, 임상, 토양경도, 유역면적, 유로길이는 유의수준 1%, 누적강우량은 유의수준 5%에서 정의 상관관계가 나타났고, 피복율은 유의수준 1%에서 부의 상관관계를 나타내었다. 산지소유역에서 임지이용에 따른 유출토사량의 발생에 많은 영향을 미치는 인자는 피복율, 누적강우량 및 임상의 순으로 나타났으며, 다중회귀식은 Y = 31.250 - 1.140(피복율) + 0.413(누적강우량) + 20.829(임상)으로 추정되었다. 산림지역에 있어서 유출토사량의 증가는 하류의 하천 및 호소의 수질 등 계류생태계에 많은 영향을 미치므로 사방조림과 사방댐 및 골막이 등 적절한 사방구조물 도입을 통한 토사유실 방지 대책이 필요하다.

• Journal of the Korean Wood Science and Technology
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• 제50권4호
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• pp.299-299
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• 2022

• Journal of Forest and Environmental Science
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• 제34권3호
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• pp.246-248
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• 2018

Urban development and population have augmented the increase of impervious land-cover. This phenomenon has amplified the effects of climate change and increasing urban island effects due to increases in urban temperatures. Seoul, South Korea is one of the largest metropolitan cities in the world. While land uses in Seoul vary, land cover patterns have not changed much (under 2%) in the past 10 years, making the city a prime target for studying the effects of land cover types on the urban temperature. This research seeks to generalize the urban temperature of Seoul through a series of statistical tests using multi-temporal remote sensing data focusing on multiple scales and typologies of green space to determine its overall effectiveness in reducing the urban heat. The distribution of LST values was reduced as the size of urban forests increased. It means that changing temperature of large-scale green-spaces is less influenced because the broad distribution could be resulted in various external variables such as slope aspect, topographic height and density of planting areas, while small-scale urban forests are more affected from that. The large-scale green spaces contributed significantly to lowering urban temperature by showing a similar mean LST value. Both of concentration and dispersal of urban forests affected the reduction of urban temperature. Therefore, the findings of this research support that creating urban forests in an urban region could reduce urban temperature regardless of the scale.

• 한국산림과학회지
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• 제94권5호통권162호
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• pp.307-312
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• 2005

This study aimed to develop an agroforestry technology through the participation of local people. The study was conducted in the Makiling Forest Reserve (MFR) of the University of the Philippines Los Banos (UPLB). Diagnosis and Design (D&D) methodology was employed to plan and implement effective research and development projects. Diagnostic interview and direct field observation were conducted to identify the significance of the land-use system and to understand how the system works. As a result of the diagnostic interview and direct field observation in San Vicente, old coconut-based land-use system is shifting to mahogany-based agroforestry system. One of the reasons is due to the very complicated socio-economic and silvicultural factors including lower price of coconut farm products, industry development, lack of labor force, and pest and diseases. Change in land use brought about by the shifting to mahogany-based farming system is slow. Also, mahogany trees are observed to be not well-maintained. However, mahogany based land use system gives farmers' a bigger income as well as environmental benefit. Farmer's cooperation and local forestry policy for CDM were proposed to encourage people's self-restoration effort.