• 한국환경복원기술학회지
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• 제12권2호
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• pp.106-113
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• 2009

In this study, stability of the new gabion system with vegetation base materials was analysed. New gabion system with vegetation base materials is a new approach which has been developed to achieve lope stabilization and revegetation of forest road cut-slope by making the best use of advantages of gabion systems with vegetation base materials. Results from stability analysis are as follows. For the soil density, the angle of internal friction and unit weight of the rock fill was assumed to be $1.90g/cm^3$, $30^{\circ}$ and $2.30t/m^3$, respectively, the slope stability analysis showed that the new gabion system couldn't require any poles to fix it up, and could keep stable during both rainy and dry seasons. As the results of checks against overturning and sliding, the retaining wall with. the new gabion system could produce suitable factors of safety for overturning and sliding. Vegetation established on the surface of the new gabion systems indirectly can help to increase slope stability by prevention of surface erosion. Consequently, the new gabion system with vegetation base materials could achieve the desired effect on slope stabilization as much as existing gab ion system could do, and could promote rapid establishment of vegetation on cut-slopes.

• 한국환경복원기술학회지
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• 제18권6호
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• pp.215-226
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• 2015

This study introduced food waste into re-vegetation base materials for surface loss recovery of carry-away highway cut slope. The object of this study is to derive the mixing ratio of food waste by conducting a test installation, monitoring, analysis and evaluation for recovery of carry-away highway cut slope. The following items were investigated and analyzed each experimental zone to draw mixing ratio of re-vegetation base materials and food waste : the physical and chemical properties of the vegetation base materials, soil-hardness, soil-humidity, left out and the collapsed point, established number of trees, species richness of grass species and tree species, coverage, pest status, and invasion of disturbance species. The re-vegetation method was evaluated by each experiment zone which has different mixing ratio. As a result, experiment zone A was rated 45 points out of 60 rating points as the best re-vegetation method. However, this study result has been derived from one construction and short-term monitoring. In order to derive the suitable and dependable mixing ratio, conducting an objective re-vegetation method evaluation and long-term experiment and monitoring is required.

• 한국산림과학회지
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• 제101권2호
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• pp.175-184
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• 2012

본 연구는 산지계류의 자연친화적 복원을 위해 산지 계류 특성에 적합한 안정성과 구조를 가지면서 계안 보호 및 복원이 가능하도록 식생기반재 돌망태 공법을 개발하고, 개발 공법의 치수안정성, 생태계 구조 및 기능, 경관에 대한 모니터링을 통해 공법의 효능을 평가하는데 그 목적이 있다. 본 보에서는 개발된 계안 복원을 위한 식생기반재 돌망태 공법 중 매트리스형 식생기반재 돌망태 공법의 계안 피복효과를 정리, 보고하였다. 사용된 매트리스형 식생기반재 돌망태의 표준형태는 $4.0m{\times}2.0m{\times}0.3m$ 크기이며, 식생기반재는 고운 흙, 유기질 비료, 유기질 토양개량재, 종자를 혼합한 것으로, 식물성 천연섬유를 공급할 수 있고 다량의 수분 보유능력을 가진 피트모스를 유기질 토양개량재로서 사용하였다. 2006년 12월 식생기반재 돌망태를 이용한 계안 복원공법 시험지가 완공된 이후, 2007년 3월부터 각 시험구간별 식생발아 및 피복도 변화에 대한 모니터링을 실시한 결과, 최초 식생 발아는 2007년 4월 12일 경이었으며, 이후 약 50일이 경과한 2007년 5월 29일 경에 모든 시험구간에서 피복도 100%에 도달하였다. 또한 큰 채움돌과 유기질 토양만을 혼합한 시험구에서 가장 높은 식생피복도를 유지하였다. 피트모스를 많이 처리한 시험구가 높은 초기 식생피복도를 보임으로서 피트모스 처리가 양호한 발아 및 생육 환경 조성에 효과적인 것으로 분석되었다.

• 한국환경복원기술학회지
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• 제15권6호
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• pp.61-67
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• 2012

This study was conducted to evaluate the effects of soil covering and vegetation base materials implementation on the growth of Lespedeza cyrtobotrya Miq. in abandoned coal mine land. We compared the biomass of L. cyrtobotrya at the study plots of four different soil covering depth (control, 10cm, 20cm, and 30cm) and four different compounds of vegetation base materials composed of soil conditioner (S), erosion control (E), and peat moss (P) (control, S+P, E+P, and S+E+P). The result showed that the biomass of L. cyrtobotrya was higher in the study plots implemented with soil covering than control plot, although the increase in biomass was not constant with soil covering depth. In case of the vegetation base materials treatments, the biomass was highest in S+E+P plot, and S+P and E+P plots showed higher biomass than control plot.

• 한국환경복원기술학회지
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• 제16권1호
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• pp.99-107
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• 2013

This study was conducted to evaluate the effect of soil covering depth and vegetation base materials on the competition between Pinus densiflora Siebold & Zucc. and Lespedeza cyrtobotrya Miq., which were grown in an abandoned coal mine land for three years after seeding, by comparing their growth and stem density. The study site was consisted of sub-plots with four different soil covering depths (0cm, 10cm, 20cm, and 30cm) and four different compounds of vegetation base materials (peat moss (control), soil conditioner+peat moss (S+P), erosion control material+peat moss (E+P), and soil conditioner+erosion control material+peat moss (S+E+P)). Results of this study showed opposite pattern between P. densiflora and L. cyrtobotrya with different soil covering depth and compounds of vegetation base materials in general. P. densiflora showed the highest growth and stem density in plots with 10cm and 0cm depths of soil covering, respectively, while the lowest was shown in plots with 20cm depth of soil covering. In contrast, L. cyrtobotrya showed the highest growth and stem density in plots with 20cm depth of soil covering, while the lowest was shown in plots with 0cm depth of soil covering. In case of vegetation base materials, P. densiflora showed the highest growth and stem density in control plots and plots treated with S+P, respectively, while the lowest was shown in plots with S+E+P treatment. On the other hand, L. cyrtobotrya showed the highest growth and stem density in plots treated with S+E+P, while the lowest was shown in control plots. These results suggested the competition between two plants as a major cause of opposite patterns, which is induced by the suppressed growth and stem density of P. densiflora by fast growing L. cyrtobotrya. Despite the suppression of L. cyrtobotrya on P. densiflora, L. cyrtobotrya can play a positive role in improving soil quality, and thus it would be more desirable for restoring abandoned coal mine land to manage the growth of L. cyrtobotrya periodically, rather than eliminate them.

• 한국환경복원기술학회지
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• 제16권4호
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• pp.15-26
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• 2013

In recent years, river maintenance projects using natural methods have been continuously implemented in urban areas and methods emphasizing ecology are being developed and constructed in revetment areas. However, there is insufficient technical review on the hydraulic stability of those revetment methods during the event of flood. Therefore, a hydraulic analysis is necessary for the stream where revetments are applied. This study was conducted to develop an objective test method for the hydraulic stability of green revetment media. For this purpose, hydraulic model tests were performed for the green base materials for revetments. Tests were conducted using experimental devices for the hydraulic model which were installed to simulate the rapid current during the flood. Loss of soil by the hydraulic condition was compared and analyzed with that of dry green revetment media, and the evaluations were made on the corrosion resistance, tractive force, and contractile force. Test results showed that green revetment media had higher corrosion resistance in non-vegetation condition compared to dry green revetment media, and the loss of base materials by the rooting of vegetation showed significant reduction by the vegetation. In addition, results of the allowable tractive force of the base material indicated it is relatively stable in vegetation condition but scouring can occur in non-vegetation condition. Therefore, the development of vegetation in revetment areas is anticipated to be effective for the stability of revetment areas by reducing external forces interacting with the corrosion resistance and stream bank. The green revetment media in expected to contribute to the stability of revetment areas.

• 한국산림과학회지
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• 제101권1호
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• pp.130-137
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• 2012

본 연구는 산지계류의 자연친화적 복원을 위해 산지 계류 특성에 적합한 안정성과 구조를 가지면서 계안 보호 및 복원이 가능하도록 식생기반재 돌망태 공법을 개발하고, 개발 공법의 치수안정성, 생태계 구조 및 기능, 경관에 대한 모니터링을 통해 공법의 효능을 평가하는데 그 목적이 있다. 본 보에서는 개발된 계류복원을 위한 식생기 반재 돌망태 공법 중 식생기반재 돌망태 옹벽 공법의 사면안정효과를 중심으로 개발 공법의 효능을 정리, 보고하였다. 개발된 식생기반재 돌망태 옹벽의 표준형태는 배면이 수직인 사다리꼴 상자이며, 전면에 경사각 $60^{\circ}{\sim}65^{\circ}$의 비탈면을 조성하여 식생의 상향 생육이 가능하도록 조치하였다. 식생기반재 돌망태 옹벽의 수리학적 안정성 분석 결과 식생으로 피복되었을 때 가장 높은 한계전단응력을 가지는 것으로 나타났으며, 많은 유량에서도 안정된 계안보호효과를 발휘하는 것으로 분석되었다. 또한, 식생기반재 돌망태 옹벽의 활동 및 전도에 대한 안정 해석 결과 적정 안전계수 1.5를 훨씬 상회하는 것으로 나타나 본 연구에서 시공한 식생기반재 돌망태 옹벽은 활동 및 전도에 대한 안정성을 가지는 것으로 분석되었다.

• 한국조경학회지
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• 제30권6호
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• pp.66-78
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• 2003

The purpose of this study was to minimize the forest disturbance around an entry road of a power transmission tower construction site between Taean and Sinsesan, Chungnam. The main study field was classified into existing materials and a GIS, remote sensing analysis, and a field examination. This information was used to identify the most suitable entry road using a degree of green naturality map, eco-naturality map, actual vegetation map, and a forest state map as the existing materials. Also, the study used an normalized difference vegetation index, altitude and slope map in order to make the evaluation materials which used an remote sensing image, and GIS. This data was used to choose an optimum area, and diagnosed the current condition of the vegetation with a field survey of the area. It analyzed vegetation structure, species diversity, the age of trees in a field examination. Subsequently, we proposed four area types based on the analysis results--preservation area, transplantation area, restoration area and development area. As a result, the preservation area was categorized into 8 grades, according to the degree of green naturality, large area of breast diameter at Pinus densiflora community, competition area of Pinus densiflora and Quercus spp. and Quercus spp. community of over 20 years old. A transplantation area established 46 optimum areas according to the GIS analysis and vegetation investigation results. Vegetation restoration plan for disturbance area should be made based on ecological value of existing vegetation to worthwhile area as Quercus spp. mixing forest proposed. The development area selected a ecological worthless place as an artificial forest where Pinus densiflora and Pinus thunbergii growth is poor. This research results suggest that restoration of vegetation will be possible in the real world. Also, ecological restoration guidelines will be made through building and analyzing data base and routine monitoring of transplantation and restoration area.

• 한국환경복원기술학회지
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• 제19권4호
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• pp.45-59
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• 2016

This study introduced wood waste into revegetation base materials for recovery of highway cut slope. The object of this study is to derive the mixing ratio of wood waste, kaoline and silica by conducting a test installation, monitoring, analysis and evaluation. The following items were investigated and analyzed each experimental zone to deduce the mixing ratio of wood waste, kaoline and silica on slope revegetation base materials: the physical and chemical properties of the vegetation base materials, soil-hardness, soil-humidity, collapse and eroded spots, established number of trees, existing species of grass and tree species, vegetation coverage ratio, pest status, and invasion of disturbance species. The revegetation method was evaluated in each experiment zone which had different mixing ratios. As a result, experiment zone C scored 47 points out of 60 as the best revegetation method. However, this result has been derived from just one construction and short-term monitoring. In order to derive the suitable and dependable mixing ratio, conducting an objective revegetation method evaluation and long-term experimenting and monitoring is required.

• 한국산림과학회지
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• 제102권1호
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• pp.30-37
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• 2013

이 연구는 식생기반재 돌망태의 침식억지효과 및 녹화효과를 분석하는데 있다. 이 연구를 통하여 얻은 결론은 다음과 같다. 조사기간 중 평균침식량을 분석해 본 결과, 침식량이 가장 많은 순으로 보면 곡선부에서의 일반돌망태시공지(5,840 $cm^3$)>대조구(5,833 $cm^3$)>직선부의 일반돌망태 시공지(5,621 $cm^3$)>곡선부의 식생기반재돌망태시공지(4,298 $cm^3$)> 직선부의 식생기반재돌망태시공지(4,117 $cm^3$)의 순으로 나타나 식생기반재 돌망태를 시공한 것이 임도절토비탈면의 침식을 저감하는데 효과적인 것으로 분석되었다. 아울러 임도 곡선부의 식생기반재돌망태 및 일반돌망태시공지의 토양침식억지효과가 직선부보다 낮게 나타나 이러한 구조물은 곡선부보다는 직선부에 설치하는 것이 효과적일 것으로 사료된다. 조사기간 중 평균식생피복률은 곡선부에서 45(28~65)%로 나타나 동일한 기간 직선부 식생기반재돌망태시공지의 평균피복률 56(30~85)% 보다 약 11(2~20)% 낮은 값을 나타내어 직선부에서의 식생피복률이 높게 나타났다. 또한 임도절토비탈면에 시공한 식생기반재돌망태는 안정화된 이후 임도 절토 비탈면의 토양침식을 억지하는 효과로 인해 식생피복률이 증가하는데 기여하는 것으로 분석되었다.