• Proceedings of the Korea Water Resources Association Conference
• /
• 2005.05b
• /
• pp.1388-1392
• /
• 2005

호안 Mattress/Filter는 철망구조 내에 채움재를 채운 다공성 구조로서 다양한 크기의 채움재를 사용할 수 있고 이로 인하여 다양한 공극을 형성할 수 있다. 이러한 Mattress/Filter의 다공성 구조는 통수성을 증가시키기 때문에 호안부에서 흐름의 에너지 및 유속을 감소시키며, 이로 인해서 소류력이 감소되어 호안의 침식을 완화시킨다. 또한 Mattress/filter에 사용되는 채움재는 자갈, 폐콘크리트 및 슬래그를 사용하기 때문에 표면이 거칠고 조도계수가 증가하게 되며, 호안에서의 조도계수의 증가는 유속의 감소와 소류력 감소를 가져온다. 한편 Mattress/Filter가 시공되고 수개월이 경과되어 식생발달 및 안정화가 이루어진 후에는 식생과 Mattress/Filter가 일체화되며, Mattress/Filter와 식생에 의해 조도계수의 증가 및 유속감소의 효과가 더욱 커지면서 결과적으로 소류력 감소효과는 증가하게 된다. Mattress/Filter의 다공성 구조는 호안의 통수성 및 조도계수를 증가시켜 호안부의 유속 및 소류력을 감소시키기 때문에 침식 및 식생유실을 완화시키게 된다. 시공 초기 식생이 발달하기 전에 복토된 토양의 유실 우려가 있을 경우 Mattress/Filter의 표면에 토양유실방지매트를 설치하여 복토된 토양이 유수에 의해 침식되는 현상을 방지할 수 있다. Mattress/Filter 시공후 수개월이 경과한 뒤에는 식생이 발달하여 유속 및 소류력 저감효과가 더욱 증가하며, 이로 인해서 더욱 안정된 식생군락을 형성시킬 수 있었다.

• Ecology and Resilient Infrastructure
• /
• v.3 no.1
• /
• pp.70-75
• /
• 2016

The purpose of this study was to develop water-purification vegetation mats consisting of the eco-friendly materials and to validate their water purification capabilities with the objective of reducing nonpoint pollution into streams. The developed vegetation mats are made of coconut fiber shell and filling consisted of zeolite, diatomaceous earth or a mixture of calcinated foam media. The bench scale assessment of the water purification capability of the three filling materials showed that the removal efficiencies of suspended solid (SS), total nitrogen (T-N) and total phosphorus (T-P) were higher in the foam media than in zeolite or diatomaceous earth. From the results of the field experiment, the removal efficiencies of the vegetation mats filled with the foam media were 60.1% in SS, 32.2% in T-N and 20.2% in T-P. Therefore the vegetation mats filled with the foam media calcinated from zeolite and diatomaceous earth should have higher efficiencies in controlling the nonpoint source pollutions in streams.

• Journal of Conservation Science
• /
• v.37 no.6
• /
• pp.659-669
• /
• 2021

In this study, vegetation index, the vegetation index calculated based on hyperspectral images was used to monitor Petroglyphs of Cheonjeon-ri, Ulju from 2014 to 2020. To select suitable the vegetation index for monitoring, indoor analysis was performed, and considering the sensitivity to biocontamination, Normalized Difference Vegetation Index (NDVI) and Triangular Vegetation Index (TVI) were selected. As a result of monitoring using the selected vegetation index, NDVI increased from 2014 to 2018 and then decreased in 2020, after preservation treatment. On the other hand, TVI was difficult to confirm the tendency during the monitoring. This difference was due to the variation in spectral reflectance according to the photographing conditions by year. Therefore NDVI is less sensitive to spectral reflectance deviation than TVI, so it can be used for monitoring. In order for TVI to be used, however, in-depth study is needed.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.9 no.2
• /
• pp.117-126
• /
• 2021

An experimental study was carried out to investigate the applicability of cement-based materials for green soil which is a soil for promoting plant growth. The results show that the shear strength of the green soil mixed with gypsum cement (No.3) was low, but the hardness (23.6mm) and pH value (7.4) was most suitable for the vegetation environment. In addition, the initial vegetation germination of green soil, which improved performance by adding a moisturizer, was slower than that of general green soil, and the conductivity value tended to be slightly higher. On the other hand, the slope adhesion of advanced green soil was high, and it was found that the plant growth rate and the regeneration capacity were superior after time passed.

• Proceedings of the Korean Institute of Landscape Architecture Conference
• /
• 2004.10a
• /
• pp.88-92
• /
• 2004

• Proceedings of the Korean Society of Environment and Ecology Conference
• /
• 2003.04a
• /
• pp.106-109
• /
• 2003

• Korean Journal of Heritage: History & Science
• /
• v.46 no.3
• /
• pp.114-133
• /
• 2013

This study aims to identify the natural damage of the Samcheonsaji Temple Site in Bukhansan National Park and to suggest the plans to minimize damage for the remains. The types of natural damage are classified into direct vegetation damage, indirect topographical damage, and artificial damage. The most popular causes of damage to temple sites include the roots of trees as direct vegetation damage and the soil erosion by rain or stream as topographical damage. Direct vegetation damage includes burial remains damaged by the root of trees and vines, but it is often observed that some trees have contributed to protection against collapse. Indirect topographical changes have damaged the ruins by soil erosion caused by floods or typhoons. Vegetation changes due to topographical reasons have also caused damage. Artificial reasons of damage include forestry operations and compaction by hikers. Based on the analysis of the findings, the following could be suggested as plans to resolve these problems: 1. Natural damage occurs slowly due to negligence. Therefore, it could be reduced by forestry improvement, including forest density control through thinning, planting to prevent landslides, maintaining grasslands nearby. 2. Deciduous broadleaf trees can be planted to reduce soil erosion by rainfall. It is necessary to maintain the density of forests at around $0.02{\sim}0.18trees/m^2$. 3. It would be good to grow Quercus spp and Carpinus spp or weaken the community of Robinia pseudoacacia and Pueraria lobata which disturb the ecosystem. Samcheonsaji Temple Site is located in Mt. Bukhan National Park that is a publicly owned property. Therefore, it is constantly maintained for natural preservation and vegetation management could be considered for the preservation of historical remains.

• Journal of the Korea Concrete Institute
• /
• v.16 no.3 s.81
• /
• pp.311-318
• /
• 2004

This study was performed to examine engineering properties for planting of porous concrete block containing rice straw ash. Tests for void ratio, compressive and flexural strength, pH by neutralization treatment time and curing method were peformed. As results, the void ratio tends to decrease with increasing rice straw ash content. But, the compressive and flexural strength tends to increase with Increasing rice straw ash content. When the neutralization was treated at the curing age 6 days, the greatest strength was showed. The pH of porous concrete without neutralization treatment in dry and water curing are shown in 10.32 ${\~}$ 10.55 and 9.41${\~}$9.59, respectively. The pH of porous concrete by neutralization treatment in dry and water curing were shown in 9.74${\~}$10.10 and 8.13${\~}$9.32, respectively. The porous concrete block size was 23 ${\times}$ 23 ${\times}$ 4 cm, and species of planting were Tall fescue, Lespedeza cyrtobotrya and Lespedeza cuneata. At the 6 months after seeding, germination ratio and grown-up length of Tall fescue, Lespedeza cyrtobotrya and Lespedeza cuneata were shown in 90, 60, $50\%$, and 40${\~}$50, 90${\~}$110, 65${\~}$75 cm, respectively. These porous concrete block containing rice straw ash could be used for planting.

• Korean Journal of Agricultural and Forest Meteorology
• /
• v.4 no.2
• /
• pp.86-94
• /
• 2002

This study was carried out to identify the relationship between naturally introduced vegetation on the abandoned coal mine lands and the surrounding forest, and to select the indigenous tree species for the revegetation of the real mine lands in Taeback, Kangwon Province, Korea. The apparent species in the surrounding forest of Sododong were 9 species of tree layer, 13 species of subtree layer, 23 species of shrub layer and 23 species of herb layer, respectively. The dominant species in Sarijae were 6 species of tree layer, 15 species of subtree layer, 31 species of shrub layer and 25 species of herb layer, respectively. The plant species in the abandoned real mine land were 31 species in Sododong and 30 species in Sarijae, respectively. The number of plant species in the abandoned coal mine land was smaller than the surrounding forest. The common species of the coal mine lands and the surrounding forest were 6 species(Betula schimidtii etc.) in Sododong and 4 species(B. costata etc.) in Sarijae. It was considered that the species in the coal mine lands introduced from the species of top layer in the surrounding forest. Especially, B. costata in Sarijae showed the edge effect which regenerates the vegetative community from the boundary area of coal mine land and surrounding forest. Natural revegetation in Sododong was also progressing by the invasion of tree species in surrounding forest, such as B. schmidtii. Consequently, natural revegetation in the disturbed coal mine lands may be related to the species composition of the surrounding forest.

• Tunnel and Underground Space
• /
• v.19 no.6
• /
• pp.526-533
• /
• 2009

This study presents Mine Green Framework(M.G.F) which can protect the slope of rock and tailings. M.G.F method provides the fiber frame which helps the growth of the plant in the barren site like mined rock slope. M.G.F system consists of the polyester fiber mat, soil, seeds and anchors for the attachment. The optimum rate of filling materials was figured out by many germination tests in order to improve the effect of filling materials and the optimum rate of filling materials was applied in four test sites individually. High rooting rate over 70% was confirmed in all field tests. Especially the moisturizer was the most important component of filling materials and it could make the better condition for the plants.