• Korean Journal of Environment and Ecology
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• v.32 no.3
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• pp.323-331
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• 2018

This study was conducted to examine the effects of constructing streetside urban forests on particulate matter (PM) content in pedestrian paths and open spaces created between the main streets and buildings in a high-rise, high-density urban area. The study site is a 70m-wide open space between Busan City Hall and Jungang-street in Busan, Korea. The results showed that the density of PM differences between the open space and the adjacent main street were small in regions without linear trees and shrub rows during both the weekdays and weekend. On the other hand, the areas with linear trees and shrub rows were found to have significantly higher concentrations of PM compared to the roadway. In particular, sections with linear trees and shrub rows had higher PM levels both on roads and in adjacent open space, indicating that the composition of linear trees and shrub rows increased the concentration of PM in the off-street open space in areas with wide space between the roadway and building. The impact was more significant in the open space than the roadway. This phenomenon can be explained by the fact that PM generated by vehicles flows through the roadside shrubs by rapid wind flow but does not disperse widely in the pedestrian paths where the wind flow was reduced. In this study, we found that the roadside tree and shrub walls slowed the flow of wind, causing vehicle-emitted PM to accumulate if a wide open space was created between the road and building, resulting in higher concentration of PM in the open space. We confirmed that the distance between the road and building was a critical factor for constructing linear trees and shrub rows to reduce PM generated by vehicle traffic.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2023.04a
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• pp.100-101
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• 2023

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2009.10a
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• pp.87-91
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• 2009

• Korean Journal of Environment and Ecology
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• v.14 no.2
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• pp.154-161
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• 2000

The objectives of this study were to determine how land use pattern in Taejon the sixth largest city in Korea has changed with urbanization. Degree of green naturalness (DGN) was used to analyze land use pattern from 1990 to 1998. Number of 1km$\times$1km grids numbers of satistical land use data and compared rate of population increase quantified land use pat-tern. The rate of population increase of Taejon was 27.8% from 1990 to 1998. Eight degrees of DGN were identified with secondary forest(grade 7) occupied the largest area (203 grids: 37.5%) of the total 541 grids in 1998. The changes in land use were compared among 1990, 1994 and 1998. Grade 1 increased by 9 grids while grade 2 decreased by 6 grids. Likewise paddy field decreased by 10km2 from 62 to 52km2 dry field and forest also decreased by 4km2 and 1km2 respectively while residence and factories increased by 10km2 and 0.5km2 respec-tively. The green space was mostly distributes in a national park and greenbelts in the outer zone of the city. As a result paddy and dry fields in central area of the city have been changed to residential and industrial areas. The city environment in term of DGN reduced its quality and quantity.

• Daejeon Development Forum
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• s.23
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• pp.86-91
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• 2007

• Korean Journal of Environment and Ecology
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• v.3 no.1
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• pp.1-15
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• 1989

To investigate the actual vegetation and the degree of green naturality(DGN) in Gaya Mountain National Park, forest communities were classified by phytosocialogical analysis according to physiognomy and Braun-Blanquet methods. Major forest communities were as follows: 1. Pinus densiflora community 1) P. densiflora-Rhododendron mucronulatum subcommunity 2) P. densiflora-Lespedeza maximowiczii subcommunity 3) P. densiflora-Sasa borealis subcommunity 4) P. densiflora-Carex siderosticta subcommunity 2. Quercus mongolica community group. 1) Q. mongolica-Rhododendron schlippenbachii community a) Typical subcommunity b) Vaccinium koreanum subcommunity 2) Q. mongolica-Sasa borealis community 3) Q. mongolica-Lespedeza maximowiczii community 3. Quercus serrata community 4. Carpinus laxiflora-Quercus serrata community 5. Rhododendron tschonoskii community 6. Lespedeza crytobotrya-Miscanthus sinensis var. purpurascens community The map of DGN was drawn according to the actual vegetaton map. The ratio of DGN 7 and 8 was 93.9% in Gaya Mountain National Park.

• Proceedings of the Safety Management and Science Conference
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• 2011.11a
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• pp.325-333
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• 2011

가로수는 공원과 더불어 도시지역의 중요 녹지공간으로 도시 이미지를 높이는데 매우 긍정적인 평가요소이며 녹지연결 및 쾌적한 가로공간 창출로 그 가치를 높이고 있다. 또한 가로등은 야간 운전자와 보행자의 안전을 보장하기 위해 중요한 시설물이다. 본 연구는 야간 운전자와 보행자의 안전을 평가하기 위한 조명 시뮬레이션 기법을 이용하여 가로수의 유형과 성장이 조명환경에 미치는 영향을 분석하기 위한 접근법을 제시한다. 가로수와 가로등은 도로 설계에 있어 중요한 요소이지만 상호간에는 각 목적에 배치되는 특징들이 있다. 특히 가로수는 가로등과 같이 고정 시설물의 성격도 있지만 성장과 형태가 다양하다는 특징이 있다. 본 연구는 상호 목적을 최적화할 수 있는 방법을 제시하기 위한 출발점으로 조명 시뮬레이션 기법을 이용하여 가로수의 유형과 성장이 야간 도로 조명에 미치는 영향을 평가하기 위한 방법을 제시한다.

• Asian Journal of Turfgrass Science
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• v.16 no.1
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• pp.41-47
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• 2002

For this study grasp quantitative humidity variation with planting stratification to various green space of calculation method, observed humidity distribution in the green space. with this data, coverage condition and humidity distribution, planting calculation method and humidity, planting stratification calculation method and humidity, analyzed by revolution analysis. In this result, as well as coverage condition, planting stratification effect humidity variation. increasing planting ratio (area) and planting volume (capacity) effect higher humidity. especially, if we compared between planting stratification calculation method and higher humidity, effect by a revolution coefficient and a correlation coefficient, effect relatively planting volume (capacity) higher than stratification ratio (area). today, in the index of higher humidity, planting calculation propose application of capacity method.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2009.10a
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• pp.99-102
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• 2009

• Journal of Korean Society of Forest Science
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• v.89 no.5
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• pp.576-584
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• 2000

The term 'greenways' is a fairly new one. The term greenways refer to linear corridors which set aside pieces of nature. The objective of this study was to find out the feasibility of developing greenways in Taegu. Sample of 446 trail users were asked to describe their use patterns and as well as their perceptions of the benefits and problems associated with trails through on-site interviews conducted during the months of July and August of 1999. Trail users in Taegu were predominately male(61%) and over half of the respondents used private vehicle to access to the study areas as compared to 2% of respondents used bicycle. Trail users responded that health & fitness and open space preservation were the two most important benefits, and the provision of trail access to disabled persons was ranked last. As problems at study areas, lack of interpretive information was the biggest problem followed by lack of drinking water, poor trail marking/signs and not enough information. Most(94.1%) of the trail users surveyed indicated that they would support greenways development and 96.8% of respondent would use after greenways development. Willingness to pay for developing greenways was assessed with hypothetical scenario. Average willingness to pay in the survey was 10,200 won as a tax. The development/application of greenways in Taegu would work best when establish a network of trails with environmentally sensitive manner.