Prioritization of Species Selection Criteria for Urban Fine Dust Reduction Planting

2019 ◽  
Vol 33 (4) ◽  
pp. 472-480
Author(s):  
Dong-Gil Cho ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 395-402
Author(s):  
Woo-Chul Choi ◽  
Kyu-Soo Cheong

This study conducted a comparative analysis of the factors affecting the concentration of fine dust before and after COVID-19. Of these, the dominant factor was CO, and the influence between variables increased even after COVID-19. In the case of PM10, the influence of wind direction and wind speed variables decreased, which is thought to be due to the reduction of westerly-based foreign air pollutants following China’s containment policy. Comparative analysis by season showed that the influence of temperature and humidity was higher in winter. In spring, the influence of wind direction and speed decreased with changes in the westerly wind and the influence of China’s containment policy. In summer and autumn, when the concentration of fine dust is relatively low, the influence of CO after COVID-19 was rather high, indicating that continuous CO management is necessary. Considering the relationship between these air pollutants and the meteorological environment, it is judged that fine dust reduction measures should be implemented.


2020 ◽  
Vol 46 (2) ◽  
pp. 148-161
Author(s):  
Joshua Petter ◽  
Paul Ries ◽  
Ashley D’Antonio ◽  
Ryan Contreras

Trees provide an array of social, economic, and ecological benefits; furthermore, trees on public land are critical for providing those benefits to people who cannot afford their own trees. It is important to know how managers make trade-offs and prioritize different tree selection criteria in order to target educational campaigns at the state or regional level. Primary contacts for Tree City USA designated cities were surveyed across the Pacific Northwest. Of these municipalities, 79 out of 151 responded (52.3% response rate), with 6 municipalities providing responses from different departments for a total of 85 responses. Currently, there are primarily descriptive statistics in relation to tree species selection. This study provides a framework for future statistical analysis and greater exploration of how municipalities and managers are selecting tree species. Results were analyzed with a Mann-Whitney U test to compare International Society of Arboriculture (ISA) Certified Arborists® to those who are not certified across various tree species selection criteria. Another Mann-Whitney U test was used to compare small (≤ 50,000) and large (> 50,000) municipalities across the same criteria. ISA Certified Arborists® showed statistically significant differences from those who are not certified in a number of tree species selection criteria. ISA Certified Arborists® also differed in urban forest management on a city-wide scale, particularly in favoring greater tree species diversity. The differences in urban forest management between ISA Certified Arborists® and noncertified—and between municipality sizes—can help to influence future educational campaigns targeted toward increasing urban forest health and resiliency.


2020 ◽  
Vol 17 (7) ◽  
pp. 3200-3206
Author(s):  
Sang-Soo Lee ◽  
Dae-Yeon Kim ◽  
In-Soo Kyoung

One of the global issues documented entails fine dust reduction, which has been experimented recently. In humans, fine dust is problematic because it causes diseases. This study employed the techniques of circulating fluid bed combustion boiler fly ash and blast furnace slag as binders. Regarding fine dust reduction, the study incorporated Bentonite, which exhibits adsorption features. Indeed, indoor air pollution arises from the dominance of fine dust. Some of the parameters that were examined included fine dust concentration, water absorption, density, flowability, compressive strength, and flexural strength. With an increase in the bentonite replacement ratio, there tends to be an increase in absorption, while the density increases. The bentonite’s porous nature has been perceived to account for this behavior. In this study, it was established further that as ben-tonite’s replacement ratio increased, there was a decrease in flowability. Additionally, there was an increase in the air content with an increase in bentonite’s replacement ratio. It was also noted that the fine dust’s adsorption performance for each minute increased with an increase in bentonite’s replacement ratio. The findings were attributed to the affirmation that with an increase in the porous bentonite’s replacement ratio, there tends to be an increase in fine dust amount adsorbed for each unique surface area. There is a need for further research in which experimentations need to focus on finishing materials and how indoor air quality could be improved.


2020 ◽  
Vol 183 ◽  
pp. 105021
Author(s):  
Stephan Gollasch ◽  
Matej David ◽  
Katja Broeg ◽  
Susanne Heitmüller ◽  
Miina Karjalainen ◽  
...  

2021 ◽  
Vol 11 (18) ◽  
pp. 8686
Author(s):  
Seungwon Cho ◽  
Muhammad Khan ◽  
Jaeho Pyeon ◽  
Chansik Park

In total, 44.3% of particle matter 10 (PM10) is fugitive dust, and one of the main sources of fugitive dust generation in Korea is construction work (22%). Construction sites account for 84% of the total business places that have reported fugitive dust generation. Currently, the concentration of fine dust at construction sites is being remotely monitored by government inspection agencies through IoT sensors, but it is difficult to trust that appropriate fine dust reduction measures are being taken, because contractors can avoid taking these measures by submitting false reports or photos. In addition, since the fine dust monitoring system under government management is not an open platform and centralized system, residents near construction sites encounter difficulties in accessing information about fine dust. Therefore, in this study, we designed and constructed a blockchain network model to transparently and reliably provide network participants with the information associated with IoT data and fine dust reduction measures. To operate the blockchain network, we designed the chaincode, DApp, and network architecture. In addition, information on fine dust concentration and reduction measure photos were shared with the participants via the blockchain search tool (Hyperledger Explorer). The proposed blockchain network is expected to form a trust protocol among contractors, government inspection agencies, and citizens.


2021 ◽  
Vol 13 (16) ◽  
pp. 8820
Author(s):  
YunEui Choi ◽  
Eunhye Ji ◽  
Jinhyung Chon

Creating a green infrastructure that is effective for reducing fine dust is a significant challenge for urban landscape planners. In this study, a fine dust reduction planting model that can be applied to socially vulnerable area was developed, and its effects were verified. Using PM10, PM2.5, temperature, relative humidity, wind direction, and wind speed measured for approximately one year, the changes in the concentration of fine dust according to the weather conditions were investigated. As a result of the analysis, there was a significant difference in the concentration of fine dust inside and outside the planting zone (p < 0.05). In addition, there is a significant difference between the fine dust reduction effect of the multilayered planting model and the single planting model (p < 0.05). The paper’s main findings are as follows: (1) When the green cover rate is over 50%, the concentration of fine dust is lower than that outside the planting zones. (2) Multilayered planting zones are more effective in reducing the concentration of fine dust than single-structured planting zones. (3) Multilayered planting zones reduce the concentration of fine dust by changing the microclimate. The results of this study can be used as basic data for small urban planting design to reduce fine dust for children’s health in socially vulnerable areas.


Sign in / Sign up

Export Citation Format

Share Document