• Journal of the Korean Society of Environmental Restoration Technology
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• v.14 no.4
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• pp.81-88
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• 2011

본 연구는 관리조방형 옥상녹화 시스템의 우수유출 저감 및 유출지연 효과를 규명하기 위하여 2007년~2010년의 4년간 연구를 진행하였다. 실험대상지는 서울여자대학교 행정관 옥상에 조성된 관리조방형 옥상녹화지로 2007년에 조성하였으며, 세덤류 및 다년생 초화류를 포함하여 총 18종의 식물을 식재하였다. 우수유출 저감 및 지연효과를 지속적으로 모니터링하기 위해 옥상녹화지를 통과한 우수를 저장할 수 있는 시스템을 설치하여 유출수의 유입량 및 시간을 측정였다. 조사기간 중 총 24번의 강우사례를 분석한 결과 단위면적당 평균 약 90.3%(78.8~99.3%)의 유출량이 저감되었으며, 지연시간은 평균 약 1.6시간으로 나타났다. 본 연구결과를 종합분석해본 바, 빗물이 거의 전량 유출되는 도심의 건축물 옥상을 녹화함으로써 옥상에 유입되는 우수의 유출을 지연 및 저감시켜 도심의 수순환체계 개선에 기여할 수 있을 것으로 생각된다.

• KIEAE Journal
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• v.13 no.5
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• pp.89-96
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• 2013

Green roofs can reduce surface water runoff, provide a habitat for wildlife moderate the urban heat island effect, improve building insulation and energy efficiency, improve the air quality, create aesthetic and amenity value, and preserve the roof's waterproofing. Green roofs are mainly divided into three types : intensive, simple-intensive, and extensive. Especially, extensive roof environment is a harsh one for plant growth; limited water availability, wide temperature fluctuations, high exposure to wind and solar radiation create highly stressed environment. This study, aimed at extensive green roof, was carried out on the rooftop of the library at Seoul Women's Univ. from October to November, 2012 and from March to August, 2013. To suggest the most effective vegetation model for biodiversity and heat island mitigation, surface temperatures were monitored by each vegetation model. We found that herbaceous plants of Aster sphathulifolius, Aceriphyllum rossii and Belamcanda chinensis, shrub of Syringa patula 'Miss Kim', Thymus quinquecostatus var. japonica, Sedum species can mixing each other. Among them, the vegetation models including Sedum takesimense, Aster sphathulifolius, Thymus quinquecostatus var. japonica was more effective on the surface temperature mitigation, because the species have the tolerance and high ratio of covering, and also in water. Especially, in the treatment of bark mulching, they helped to increase the temperature of vegetation models. In the case of summer, temperature mitigation of vegetation models were no significant difference among vegetation types. Compared to surface temperature of June, July and August were apparent impact of temperature mitigation, it shows that temperature mitigation are strongly influenced by substrate water content.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2010.04a
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• pp.261-265
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• 2010

• Korean Journal of Environment and Ecology
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• v.25 no.3
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• pp.404-411
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• 2011

The purpose of this study was to analyze the characteristics of plant covering in the extensive green roof site. Eighteen herbaceous perennial grass such as Caryopteris incara and sedum species such as Sedum Kamtschaticum were planted on an experimental green roof with 10cm substrate depth in 2007. This study investigated vegetation change over 3 growing seasons 2007-2009. The covering rates of planted species mostly increased in 2008, but declined in 2009 except 6 species such as sedum specis and Thymus quinquecostatus var. japonica etc. There were four categories of covering characteristics generated from the results of this study. These include the type of sustain planting site, the type of encroach adjacent site, the type of creeps and spreads, and the type of scatters and spreads. The covering models of eight planted species were drawn by simple regression analysis. However more monitoring of various plants will be needed to establish the information for sustainable roof planting plan.

• Korean Journal of Environment and Ecology
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• v.24 no.3
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• pp.334-342
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• 2010

The purpose of this study is conducted to examine the change of flora and fauna in the extensive rooftop green area from 2005 to 2009. The experimental site is on the rooftop green area of Seoul Women's University which was constructed in 2005. This research was consisted of four parts: soil, potted plants, invading plants and small animals especially insects. The plants were surveyed by enumeration, while animals were surveyed by two methods which are 'Netting and Searching' and 'Pit fall trap'. The initial group of plants planted in 2005 was 100 species of 26 families whereas in 2009 there were 62 species of 23 families including 22 invading species of 11 families. In case of insects in 2009, 21 species of 7 families (9 orders) were detected; 19 species of 15 families (8 orders) were discovered by 'Netting and Searching' and 5 species of 5 families (5 orders) by 'Pit fall trap'.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.15 no.2
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• pp.137-147
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• 2012

GRS is an effective urban ecology restoration technique that can manage a variety of environmental functions such as ecological restoration, rainwater spill control and island heat effect from a low-impact development standpoint that can be utilized in new construction and retrofits. Recently, quantitative evaluation studies, both domestic and abroad, in the areas related to these functions, including near-earth surface climate phenomenon, heavy rainwater regulation, thermal environment of buildings, have been actively underway, and there is a trend to standardize in the form of technological standards. In particular, centered on the advanced European countries, studies of standardizing the specific insulation capability of buildings with green system that comprehensively includes the green roof, from the perspective of replacing the exterior materials of existing buildings, are in progress. The limitation of related studies in the difficulties associated with deriving results that reflect material characteristics of continuously evolving systems due in part to not having sufficiently considered the main components of green system, mechanisms of vegetation, soils. This study attempts to derive, through EnergyPlus, the effects that the vegetation-related indicators such as vegetation height, FCV, etc. have on building energy load, by interpreting vegetation and soil mechanisms through plant canopy model and using an ecological standard indicator LAI that represent the condition of plant growth. Through this, the interpretations that assume green roof system as simple heat insulation will be complemented and a more practical building energy performance evaluation method that reflects numerical methods for heat fluxes phenomena that occur between ecology restoration systems comprised of plants and soil and the ambient space.