• 한국방재학회 논문집
• /
• 제10권2호
• /
• pp.135-141
• /
• 2010

현재 우리나라 도심하천의 고수호안 설계에서는 치수적 안정성 확보를 위해 기 설치된 콘크리트 호안을 철거하는 대신에 복토 후 식생매트 공법을 통한 자연친화적인 하천공법이 널리 사용되고 있다. 그러나 이와 같은 복토공법의 적절한 수리학적 기준이 제시되지 않아 홍수기 유실로 인한 경제적 손실이 자주 발생하고 있다. 본 연구에서는 수리적 안정성을 포함한 친환경적인 식생복토공법의 유실율 평가에 관해 수리모형 실험을 통해 규명하고자 하였다. 식생의 활착 유무에 따른 복토의 유실율을 살펴보면 호안경사에 따라서 식생의 유무에 따른 유실율 차이가 52%로 나타났으며, 호안의 경사도가 클수록 식생에 의한 저감효과가 큰 것으로 연구결과 나타났다. 또한 유속 조건 및 호안의 경사에 따라서 식생이 없을 경우 유실율이 최대 19.5%로 나타났다.

• 한국환경복원기술학회지
• /
• 제21권3호
• /
• pp.99-110
• /
• 2018

Compared to yellow dust coming from China or particulate matter created naturally in spring due to Total Suspended Particulate(TSP), particulate matter in winter season have much more serious effect on human body as they penetrate cell membranes. Although such particulate matter are becoming a social issue, there are no concrete plans on how to reduce them. Air-purifying plants are limited in maintaining the indoor air quality of large area because it is usually difficult to quantify their performance. In order to improve this, a bio-filter that can be connected to air conditioner is suggested as an option. This study seeks to improve air conditioning model-based monitoring method for bio-filters from prior studies and objectify correlations between applied vegetation and growing environment into quantitative indicators. By doing so, this study seeks to provide criteria on plants applied to artificial soil-based vegetation bio-filters and basic information to set air-conditioning features. The study results confirmed significant tendency on the growing stability of each purifying plant in mechanical air-conditioning environment. Among three models selected for bio-filter vegetation models, epipremnum aureum showed high performance in quantitative indicators, including soil moisture, EC, and leaf temperature, etc., indicating that it would assure the highest growing stability in this test air-conditioning environment.

• 한국습지학회지
• /
• 제12권2호
• /
• pp.75-89
• /
• 2010

본 연구의 목적은 고수호안 식생매트공법의 수리적 안정성을 검토하는 것이다. 최근 들어 치수 기능만을 위한 공학적 효율 위주의 하천관리 정책에서 벗어나 하천의 환경적 기능의 개선을 위한 생태하천으로의 복원사업이 이루어지고 있다. 치수 안정성 확보를 위해 기 설치된 콘크리트 호안을 철거하는 대신 복토 후 식생매트를 덮어주는 공법인 식생매트 공법은 다양한 복토공법 중 하나이다. 그러나 이와 같은 복토공법의 적절한 수리학적 기준이 제시되지 않아 홍수기 때 유실로 인한 경제적 손실이 자주 발생하고 있다. 본 연구에서는 고수호안의 복토공법에 대한 수리실험을 통해 수리학적 조건에 따른 토양의 유실율을 평가하고, 식생매트 설치여부에 따른 토양유실율의 비교를 통해 수리적 안정성을 평가하였다. 또한 복토공법의 수리학적 안정성을 확보하기 위한 고수호안 주변의 유속 구조에 대하여 실험과 수치해석을 통해 분석하였다.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2023년도 봄 학술논문 발표대회
• /
• pp.311-312
• /
• 2023

In this study, porous concrete with improved functionality was developed by using superabsorbent polymer (SAP) to provide rooting space for plants. The depth of settlement and mass change according to the substitution and addition rate of SAP were determined by investigating the functional performance of SAP and the volume change upon saturation. Test results indicated the depth of penetration settlement increased as the substitution rate of SAP increased, but the mass change could not be confirmed as the addition rate of SAP increased. The instability of the specimens due to the excessive volume change of SAP, as well as the osmotic pressure phenomenon according to the pH concentration, were identified as the cause. Therefore, future studies are needed to investigate the appropriate substitution and addition rate of SAP, as well as to reduce the osmotic pressure phenomenon according to the pH concentration, which would contribute to the improvement of the functional performance of vegetation concrete.

• 한국환경복원기술학회지
• /
• 제19권2호
• /
• pp.55-69
• /
• 2016

Significant efforts are being devoted in mitigating the urban heat island effect, and extensive green roofs are an option for mitigation. The purpose of this study was to compare the surface temperature, vegetation types, and plant species on an extensive green roof. Test beds were created in May 2015, and the surface temperature was monitored from June to August. The test beds comprised polyculture and monoculture. Polyculture was divided into three types, and monoculture comprised eight plant species. An extensive green roof is effective in reducing temperature by forming a shade and preventing sunlight from falling on the surface of buildings, which mitigates the urban heat island effect. Consequently, the surface temperature of the green roof and that of concrete during summer reduced from $17.8^{\circ}C$ to $7.3^{\circ}C$. The temperature reduction was greater on using polyculture than on using monoculture, but monocultures of Sedum takesimense, Hemerocallis dumortieri, Allium senescens, Aster yomena, Belamcanda chinensis, and Aster koraiensis also produced good results. The temperature reduction effects of Polygonatum odoratum var. pluriflorum f. variegatum, Phlox subulata, and Thymus quinquecostatus var. japonica were excellent compared with those of concrete but were less than those of other plant species. Careful attention is needed for the management of extensive green roofs. Studies on the plant species and types of extensive green roof should continue to mitigate the urban heat island effect.

• 한국환경복원기술학회지
• /
• 제19권5호
• /
• pp.47-57
• /
• 2016

In the recent years, the incidence of abandoned concrete roads have been increasing rapidly due to road improvements and facilities route construction, these abandoned expressway and unused roads are scattered throughout the country but the management system is not clear, they does not be an effectively managed because there is no maintenance cost. In response to these social concern and expectation, the Korea Expressway Corporation that is management authority of the expressway is developing policy initiatives and various projects to restore the closed road to ecological for eco-friendly projects of the existing expressway. And as part of these projects, Hwanggan IC unmanaged abandoned concrete roads restoration project was done and it was conducting monitoring for ecological restoration that is not one-off but sustainable. After test construction over seven years at the time, test construction of four ways enforced but the boundaries have become blurred over time. And Pinus koraiensis, Callicarpa dichotoma and Sorbaria stellipilla var. typica planted in the site are dominating, else Amorpha fruticosa and Indigofera pseudotinctoria sowed are dominating. Invasive species is that Robinia pseudoacacia was growing in the colony. Over monitoring result time, the vegetation was taking root and the ecosystem was being restore. But the disturbance of vegetation happens due to planting of tree species that doesn't fit in the restoration area and advent of ecosystem Disturbing Species. The study will be providing a basic data that identify change of plant environment by monitoring of the site and soil environment during June to November 2016 and secure an objective evaluation data by analyzing the effects of ecological restoration for revegetation test bed evaluation for ecological restoration of expressway in ecological restoration construction in later.

• 한국조경학회지
• /
• 제34권3호
• /
• pp.1-11
• /
• 2006

This study analyzed characteristics of natural and human environments in Chuncheon's Gongji stream, and suggested nature-friendly planning strategies for self-purification of water quality, biodiversity improvement and conservative waterfront recreation. The environmental analysis included streambed structures, floodplain soils, water quality, vegetation, wildlife, and human facilities. Natural colonization of vegetation for the middle section of the study stream was obstructed by a straightened concrete revetment of baseflow channel, and vehicle movement and concrete parking lots across the floodplain. These human disturbances also deteriorated the naturalness of the stream landscape and limited habitation of bird species. However, natural sedimented wetlands in half of the channel width for the lower section of the stream contributed to a desirable vegetational landscape and greater bird occurrence. Based on BOD measurements, water quality of the stream fell under class $II{\sim}III$ of the stream water-quality standard, but it was worse around sewage outlets due to incomplete sewage collection especially during the dry season. Dominant fish species included typical inhabitants of good water-quality streams that are tolerant of adverse habitat changes. Nature-friendly planning strategies were established based on analysis of the environmental characteristics. They focused on not merely spatial zoning and layout divided into four zones - preservation, partial preservation, conservation and use -, but close-to-nature channel revetment techniques, natural water-purification facilities, biotope diversification, and water-friendly recreation and circulation. Strategies pursued both renewal of stream naturalness and hydraulic stability of streamflow by minimizing transformation of natural channel micro-topography and biotope, and by reflecting natural traces of streambed structures such as revetment scour and sedimentation.

• Journal of Ecology and Environment
• /
• 제30권2호
• /
• pp.171-177
• /
• 2007

Korean rivers and their surrounding environments have been used excessively for rice production in the past and more recently for construction of urban areas to accomodate the rapidly increasing population. Affected Korean rivers experience dramatic fluctuations in their water levels and have faster currents compared with those in other countries. In order to restore more natural conditions in rivers experiencing such conditions, we employed a partial restoration method, which is designed to achieve physical and biological stability simultaneously. Concrete blocks were introduced to increase the river's physical stability during floods, and terra cottem, a soil enhancer, was used to reduce water loss due to intense heat. These interventions increased the river's ability to hold water and thereby promoted plant growth. This restoration method increased vegetation coverage and species diversity in treated areas, and changed the species composition in treated areas to more closely approximate that of the control site. These results suggest that this method is effective in restoring damaged habitats to more natural conditions.

• 한국지반환경공학회 논문집
• /
• 제14권12호
• /
• pp.53-60
• /
• 2013

본 연구에서는 장기식생이 가능한 전면 식생형 보강토 옹벽의 식생 환경 적합성을 모니터링하고, 전면벽체 표면온도 측정을 통해 한여름철의 콘크리트 옹벽 전면벽체의 온도 변화를 평가하였다. 이를 위해 장기식생이 가능하도록 식생 포대를 삽입한 특수 블록 벽체를 시공하여 구절초, 맥문동을 포함한 20여 종의 종자 식재 후 2년간 식생 환경을 관찰하였을 뿐만 아니라, 실제 크기의 식생 옹벽을 건설하여 한여름철 식생 및 무식생 옹벽의 전면벽체 표면온도를 비교 분석하였다. 식생 환경 모니터링을 수행한 결과, 장기 식생이 가능한 블록 내에 식재된 대부분의 식물 생장 상태는 양호한 것으로 나타났으며, 식생 포대를 삽입한 블록 벽체가 식물의 성장에 적합한 환경을 제공하는 것으로 나타났다. 또한, 한여름철의 식생 옹벽과 무식생 옹벽의 콘크리트 블록 표면의 온도 변화량을 측정한 결과, 식생 옹벽에 비해 무식생 옹벽의 표면온도가 높게 나타났다. 식생 옹벽의 전면벽체의 경우, 무식생 옹벽의 전면벽체에 비해 표면온도 증가율이 작게 나타난 반면, 냉각율은 더 크게 나타나 장기식생이 가능한 전면 식생형 보강토 옹벽은 식생을 통해 열섬효과를 완화하는데 효과적으로 작용할 수 있을 것으로 판단된다.

• 한국습지학회지
• /
• 제12권3호
• /
• pp.21-37
• /
• 2010

남강 본류로 유입되는 경상남도 진주시 관내에 소재한 13개 지류에서 습지의 보전 현황을 평가하고 우수한 습지생태계를 발굴하며 인위적인 훼손과 오염으로부터 습지생태계를 보호하기 위한 보전 대책을 제시하기 위하여 습지생태계의 생물 서식지로서의 물리적 특성과 식생의 자연도를 조사하였다. 지류 주변의 토지 이용, 제방상단의 생태적 기능, 제방 사면의 구조, 둔치의 인공화 정도 및 이용 강도, 호안의 인공화 정도, 하상 재료의 다양성, 하천의 횡단 구조물 등으로부터 산정한 물리적 특성의 자연도 평가지수는 오미천이 가장 높고 반성천, 향양천, 그리고 나불천, 영천강 및 수곡천, 중촌천, 대곡천 등의 순이었으며, 문산천이 가장 낮았다. 식생의 다양성, 외래종의 우점면적, 1년생 초본의 우점면적, 현존식생의 자연도 및 특이성, 종다양성 등으로부터 산정한 식생자연도의 평가지수는 오미천이 가장 높고, 수곡천, 반성천, 영천강, 중촌천, 지내천, 나불천, 지수천 등의 순이었으며 용아천이 가장 낮았다. 물리적 특성과 식생 자연도의 평가지수로부터 산정한 하천 자연도는 오미천이 I등급으로 가장 높고, II등급인 반성천, 수곡천, 영천강, 나불천 및 중촌천, 향양천, 지내천, 지수천, 대곡천, 문산천 및 독산천 등의 순이었으며, 용아천이 III등급으로 가장 낮았다. 지류의 습지생태계를 복원하여 하천의 자연도를 향상시키기 위한 보전대책이 제시되었다.