• 한국산학기술학회논문지
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• 제13권12호
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• pp.6151-6158
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• 2012

친환경 하천사업의 활성화로 식생매트의 사용은 증가하고 있으나 수리적 안정성에 대한 평가는 미흡한 실정이다. 본 연구는 호안용 식생매트 제품의 객관적인 수리안정성 시험 기법 개발을 위해 수행하였다. 이를 위해서 식생매트 2종에 대한 실규모 실험을 수행하여 수리량을 측정하고 분석하여 작용 소류력을 계산하였다. 1차원 부정류 모형을 이용하여 최적 조도계수를 결정하고 작용 소류력을 계산하였다. 각 유량의 시험 후에는 매트 표면 및 기반층의 변동 여부를 기록하여 평가하였으며 이에 따라 매트표면의 손상 유형 3가지 및 기반층의 손상 유형 2가지를 제시하였다. 본 연구에서는 식생매트의 표면 변동이 있더라도 하부 기반층의 유실이 발생하지 않는 경우에는 안정한 상태로 제안하였다. 이에 따라 실험체 2종의 허용소류력을 평가하였으며 철망으로 보강된 식생매트가 허용 소류력 측면에서 효과가 있는 것을 확인할 수 있었다.

• 한국산학기술학회논문지
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• 제14권11호
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• pp.5956-5963
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• 2013

친환경 하천사업의 활성화로 식생매트의 사용은 증가하고 있으나 수리적 안정성에 대한 평가기법은 제시되지 않은 실정이다. 본 연구는 호안용 식생매트 제품의 객관적인 수리안정성 시험 기법 개발을 위해 수행하였다. 이를 위해서 식생매트 2종에 대한 실규모 실험을 수행하여 수리량을 측정하고 분석하여 작용 소류력을 계산하였다. 작용 소류력에 대한 토양손실평가를 위하여 지상라이다에 의한 측량을 수행하고 실험 전후의 하상고 변화를 평가하여 토양손실지수(CSLI)를 산정하였으며, 작용 소류력과 함께 도시하여 허용 소류력을 정량적으로 평가하였다. 하상고에 대한 정밀 측량 결과 분석에 의해서 식생매트가 안정한 경우에는 하상 변동이 국부적으로 제한되나, 불안정으로 판정되는 경우에는 식생매트 하부에서 비교적 큰 규모의 하상 변동이 발생하며 이는 자연 하상의 거동과 유사함을 확인하였다. 이상의 연구를 통해서 ASTM D 6040에 의한 식생매트의 허용 소류력 평가가 파괴 메카니즘 및 토양손실판정 기준에서 유효함을 확인할 수 있었다.

• Ecology and Resilient Infrastructure
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• 제3권1호
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• pp.70-75
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• 2016

본 연구의 목적은 하천과 호소로 유입되는 비점오염을 저감하기 위해 자연형 하천조성기술 중에서 활용성이 증가되고 있는 식생 매트에 충진재를 적용하여 수질정화기능을 향상하는데 있다. 본 연구에서는 우수한 충진재 선별을 위하여 제올라이트, 규조토 그리고 이들을 혼합하여 소성한 발포여재에 대한 수질정화기능 실내 평가실험과 제방사면조건에서 강우 유출수를 대상으로 한 식생 매트의 수질정화능 검증 현장실험을 진행하였다. 충진재별 수질정화기능은 발포여재가 SS 46.3%, T-N 29.9%, T-P 33.3%로서 다른 충진재보다 수질정화기능이 우수하였다. 식생 매트의 현장 실험에서는 수질정화능은 SS가 60.1%, T-N이 32.2%, T-P가 20.2%으로서 식생 매트의 우수한 오염저감 능력을 확인할 수 있었다.

• 한국환경복원기술학회지
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• 제6권2호
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• pp.78-88
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• 2003

This study was conducted to develop the plant-mat for ecological restoration which was formed as the thin multi-layers of woven nets, soil media, seeds, etc. The experimental site was selected at a slope of 240$m^2$ at the rear of Design College of Sangmyung University and divided into 8 sub-experimental plots (20$m^2$ each) according to mat types. (forest-type and grass-type mats with and without seed attachment, respectively) Also, the existing vegetation plot and the no-treatment plot were included in this experiment for comparison. The experiment construction was conducted on September 3, 2002. Mat covered plots regardless of seed attachment showed nearly no signs of erosion even if rainy season in summer compared to the no-treatment plot. Vegetation monitoring result showed that germination rates were somewhat high in both forest and grass-type mats without seed attachment in the initial germination stage. Although germination rates of seed attached mats were somewhat slower than non-seed attached mats in the germination stage, but over time, it showed a good rooting and shooting environment for germinated tree and grass species because of soil media existence within the mat. This indicates that while non seed-attached mats require follow-up maintenance, seed-attached mats does not require maintenance after rooting and germination.

• 한국수자원학회논문집
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• 제53권3호
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• pp.167-179
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• 2020

최근 바이오폴리머 소재를 이용하여 자연 흙의 강도와 식생의 생장을 증진하는 새로운 제방 소재가 개발되었다. 본 연구에서는 바이오폴리머 혼합토를 친환경 제방 재료로 활용하기 위해 혼합토로 조성된 식생 매트의 한계 소류력을 평가하였다. 혼합토는 베타글루칸을 주재료로 모래와 황토를 혼합하여 조성하였다. 실규모 시험체를 제작하여 혼합토를 3 cm 도포하였으며 식생과 매트를 이용하여 4개의 시험체를 제작하였다. 실규모 실험에 의해 손상과 토양유실을 관측하여 한계 소류력을 결정하였다. 식생 호안의 특성상 식생의 피복도에 따라 영향을 받기는 하지만 식생이 활착된 경우 개략적으로 한계소류력 42 N/㎡, 한계유속 4 m/sec을 실험을 통해 확인하였다. 또한 매트공법이 적용된 경우에는 뿌리와 매트의 결합으로 침식저항성이 강화됨을 확인하였다.

• 한국환경복원기술학회지
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• 제5권1호
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• pp.59-65
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• 2002

The community of common reed (Phragmites australis) is expanded by the development of new shoots from nodes of rhizomes and old shoots in natural environments. We developed the useful technique to construct reed mats of floating islands developed from shoot nodes of reeds for the purpose of the rapid stabilization of vegetation and the application of adapted plants with their specific environmental conditions. The vegetation development was compared in the floating islands planted with the different reed samples. The reed samples were consisted of four types : long shoot in the length of 100 cm (AG I), short shoot of 15 cm (AG II), long rhizome of 100 cm (BG I) and short rhizome of 15 cm (BG II). Shooting started earlier in BG I and BG II than in AG I and AG II. But the rate of shooting was higher in AG I and AG II than in BG I and BG II. After four weeks, AG I and AG II were higher than BG I and BG II in the biomass and density of newly developed shoots. These results showed that the construction of sod mats by planting only reed shoots was a useful technique to develop vegetation on the floating islands.

• 한국건설순환자원학회논문집
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• 제4권2호
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• pp.112-117
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• 2016

본 연구에서는 급속히 성장하고 있는 산업분야인 생분해성 플라스틱인 PLA(Poly Lactic Acid)를 사용하여 개발된 식생매트의 생분해기간에 따른 인장성능을 비교하였다. 시험방법은 한국산업표준(KS)에서 정한 방법을 준용하였다. 단일소재로 제작된 PLA 매쉬 및 PLA 플라스틱으로 실험한 두꼐, 인장강도 및 분자량은 5개월 생분해 기간에 반비례하는 결과를 나타내었다. PLA 매쉬의 두께는 11.2%~13.4% 수준까지 두께가 증가하였으며 PLA 매쉬의 인장강도는 32.4%~55.4% 수준까지 감소하였다. PLA 플라스틱의 인장강도 및 분자량도 시간경과에 따라 감소하는 것을 확인할 수 있었다. 다만, PLA 매쉬, 부직포(씨앗포함) 및 황마네트로 혼합 구성된 식생매트의 인장시험결과는 특정한 경향성을 보이지 못하였다.

• 한국환경농학회지
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• 제41권1호
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• pp.65-70
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• 2022

BACKGROUND: The Geomunoreum Lava Tube System (GLTS) is both vast and culturally valuable. The Jeju Volcanic Island and Lava Tubes, which are partly composed of the GLTS, have been declared as a United Nations Educational, Scientific, and Cultural Organization (UNESCO) World Heritage Site. Exploration of the caves is strictly regulated to conserve these vulnerable environments. Photographs provide limited information and do not describe the entire environment comprehensively. Therefore, we created several illustrations of the lava tubes to display their environmental features. METHODS AND RESULTS: We explored six lava caves (upstream and downstream) in the GLTS and photographed their geological features and yellow walls, the colors of which are influenced by microbial mats. We compared the hex codes of the wall colors using the Clip Studio v1.10.5 software and created illustrations that accurately represent the scale and features of the caves. CONCLUSION(S): Upstream and downstream caves of the GLTS differ in scale and volcanic features. We illustrated various characteristics of the caves including lava cave features, vegetation, and microbial mats. We also described the internal and external cave environments.

• 한국환경복원기술학회지
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• 제6권4호
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• pp.62-73
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• 2003

The study was to apply a mat style reed planting method at confluence to improve plants growth conditions by relaxing disturbed topographical base due to water flow and was intended to review the effect to build up a vegetation strip by monitoring process after the construction. First off, We've attempted to construct reed mats on selected sites as confluences of Tan and Gaehwa stream and then examined and analyzed characteristics of soil and vegetation community. As the results of the examination, the soil texture was proven to be a mix of sand and loamy sand and be 6.3 ~ 7.0 soil pH. In addition, it contained 1.0 ~ 4.6% of organic matter, 0.04 ~ 0.22% of T-N and 27.8 ~ 41.2% of water content. For its vegetation structure, the Tan stream confluence was first actually a point bar without plants prior to the construction but 8 kinds of hygrophytes including Persicaria hydropiper and 9 kinds of terrestrial plants such as Potentilla supina, Artemisia annua, and Alopecurus aequalis var. amurensis. On the other hand, the Gaehwa stream confluence contained 6 kinds of hygrophytes such as Bidens frondosa and other 11 kinds of terrestrial plants prior to the construction while it produced 7 kinds of hygrophytes including Ranunculus ternatus as well as Phragmites australis and 9 kinds of terrestrial plants such as Potentilla supina after the construction. For the Phragmites australis, almost of them was weathered away in early days just after planting because of development period passed, but on May, six months later from planting, it was investigated that its length was approximated as 65 ~ 85cm with 75% coverage and that the number of it was 437 ~ 633/$m^2$. The study was shown that reed mats can improve environmental conditions of disturbed topographical base, enabling natural growth of various riparian vegetation including the introduced plant, reed. In the meantime, it was supposedly judged that to recover or build up a vegetarian strip, supplementary materials should be prepared to help produce and grow plants because it is not probable to expect river drift by water flow at confluence and that corrosion, burying or inundation owing to changes of water lever should be considered.

• 한국환경과학회지
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• 제31권3호
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• pp.247-254
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• 2022

This study investigated the effect of vegetation mat on plant growth and salt reduction in the soil treated with high concentration deicing salt. In order to measure soil chemical characteristics and plant growth, three native groundcover plants (Dendranthema zawadskii var. latilobum, Dendranthema boreale, and Kalimeris yomena) were grown in each of the three plastic containers (50.0 cm width × 35.0 cm length × 8.5 cm deep) with a high concentration treatment of calcium chloride deicing salt. There were two treatments: control, and BVM that combines B (blanket) and VM (vegetation mat). 1,600 g of soil was placed on the top of the drainage layer with 290 g of perlite, 100 seeds each of the three native plants with three repetitions were sowed, and 10 g/L of calcium chloride deicing salt was added in the treatment. As a result of the chemical properties of soil, soil in control treatment was acidic and soil electrical conductivity in BVM was the lowest. Also, exchangeable cations (K⁺, Ca²⁺, Na⁺, and Mg²⁺) in soil and all the three plants were significantly decreased in the BVM treatment. Meanwhile, the germination rate of Dendranthema zawadskii var. latilobum was the highest under high concentration deicing salt in compared to the two plants. Overall, three native groundcover plant growth was higher in the BVM than control treatment significantly. These results suggest that the treatment of blanket vegetation mat has a positive effect on soil and plant growth in soil damaged by deicing salt.