scholarly journals Quantifying the Potential Contribution of Urban Forest to PM2.5 Removal in the City of Shanghai, China

Atmosphere ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1171
Author(s):  
Biao Zhang ◽  
Zixia Xie ◽  
Xinlu She ◽  
Jixi Gao
Keyword(s):  
Human Population ◽  
Urban Forest ◽  
Population Distribution ◽  
Remote Sensing Data ◽  
Potential Contribution ◽  
Removal Capacity ◽  
Insufficient Amount ◽  
Vertical Planting ◽  
Building Walls ◽  
The City

Climate change and air pollution pose multiple health threats to humans through complex and interacting pathways, whereas urban vegetation can improve air quality by influencing pollutant deposition and dispersion. This study estimated the amount of PM2.5 removal by the urban forest in the city of Shanghai by using remote sensing data of vegetation and a model approach. We also identified its potential contribution of urban forest presence in relation to human population and particulate matter concentration. Results show that the urban forest in Shanghai reached 46,161 ha in 2017, and could capture 874 t of PM2.5 with an average of 18.94 kg/ha. There are significant spatial heterogeneities in the role of different forest communities and administrative districts in removing PM2.5. Although PM2.5 removal was relatively harmonized with the human population distribution in terms of space, approximately 57.41% of the urban forest presented low coupling between removal capacity and PM2.5 concentration. Therefore, we propose to plant more trees with high removal capacity of PM2.5 in the western areas of Shanghai, and increase vertical planting in bridge pillars and building walls to compensate the insufficient amount of urban forest in the center area.

scholarly journals Green(er) Cities and Their Citizens: Insights from the Participatory Budget of Lisbon

2021 ◽  
Vol 13 (15) ◽  
pp. 8243
Author(s):  
Roberto Falanga ◽  
Jessica Verheij ◽  
Olivia Bina
Keyword(s):  
Public Funding ◽  
Urban Sustainability ◽  
City Council ◽  
Potential Contribution ◽  
Political Awareness ◽  
Emerging Trends ◽  
Trade Offs ◽  
International Discourse ◽  
Participatory Budget ◽  
The City

There is rising scholarly and political interest in participatory budgets and their potential to advance urban sustainability. This article aims to contribute to this field of study through the specific lens of the city of Lisbon’s experience as an internationally acknowledged leader in participatory budgeting. To this end, the article critically examines the lessons and potential contribution of the Lisbon Participatory Budget through a multimethod approach. Emerging trends and variations of citizen proposals, projects, votes, and public funding are analysed in tandem with emerging key topics that show links and trade-offs between locally embedded participation and the international discourse on urban sustainability. Our analysis reveals three interconnected findings: first, the achievements of the Lisbon Participatory Budget show the potential to counteract the dominant engineered approach to urban sustainability; second, trends and variations of the achievements depend on both citizens’ voice and the significant influence of the city council through policymaking; and, third, the shift towards a thematic Green Participatory Budget in 2020 was not driven by consolidated social and political awareness on the achievements, suggesting that more could be achieved through the 2021 urban sustainability oriented Participatory Budget. We conclude recommending that this kind of analysis should be systematically carried out and disseminated within city council departments, promoting much needed internal awareness of PBs’ potential as drivers of urban sustainability. We also identify further research needed into the sustainability potential of green PBs.

scholarly journals Spatio-Temporal Changes of Urban Forests and Planning Evolution in a Highly Dynamical Urban Area: The Case Study of Wrocław, Poland

Forests ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 17 ◽  
Author(s):  
Justyna Jaworek-Jakubska ◽  
Maciej Filipiak ◽  
Adam Michalski ◽  
Anna Napierała-Filipiak
Keyword(s):  
World War Ii ◽  
Urban Forest ◽  
Urban Forests ◽  
Spatial Dimension ◽  
Temporal Changes ◽  
City Centre ◽  
Socialist Economy ◽  
Urban Green Spaces ◽  
Spatio Temporal ◽  
The City

Knowledge about urban forests in Poland is still limited, as it is primarily based on aggregate, formal data relating to the general area, ignoring the spatial dimension and informal green areas. This article describes and analyses spatio-temporal changes in the actual urban forest resources in Wrocław in 1944–2017, which covers the first period of the city’s rebuilding after its destruction during World War II and its development during the nationalised, centrally-planned socialist economy, as well as the second period of intensive and only partly controlled growth under conditions of market economy. The study is based on current and historical orthophotomaps, which were confronted with cartographic data, as well as planning documents. We found that between 1944 and 2017, the percentage contribution of informal woodlands increased tenfold (from 0.5 to 4.9% of the present total area of the city). The area occupied by such forests has grown particularly during the most recent years of the city’s intensive development. However, the forests have been increasingly fragmented. During the first period, new forest areas were also created in the immediate vicinity of the city centre, while during the second one, only in its peripheral sections. The post-war plans regarding the urban green spaces (UGS), including the current plan, are very conservative in nature. On the one hand, this means no interference with the oldest, biggest, and most valuable forest complexes, but on the other hand, insufficient consideration of the intensive built-up area expansion on former agriculture areas. Only to a limited extent did the above-mentioned plans take into account the informal woodlands, which provide an opportunity for strengthening the functional connectivity of landscape.

Surface modelling of human population distribution in China

2005 ◽  
Vol 181 (4) ◽  
pp. 461-478 ◽  
Author(s):  
Tian Xiang Yue ◽  
Ying An Wang ◽  
Ji Yuan Liu ◽  
Shu Peng Chen ◽  
Dong Sheng Qiu ◽  
...  
Keyword(s):  
Human Population ◽  
Population Distribution ◽  
Surface Modelling

scholarly journals Redesigning Taman Hutan Kota PLN Medan (City Park) According to People’s Preferences

2020 ◽  
Vol 4 (2) ◽  
pp. 120-129
Author(s):  
Rani Aurora Barus ◽  
Siti Nurkholila Hafni ◽  
Dwiki Alfajar Andrea
Keyword(s):  
Public Space ◽  
Green Space ◽  
Urban Forest ◽  
The Real ◽  
Important Resource ◽  
Urban Quality ◽  
The City ◽  
City Park

Taman Hutan Kota PLN Medan is one of important part from the city, if the park managed properly it would give a good impact to increase the quality of public space which is lead to make a positive and better contribution to people's lives who lived in the busy city like Medan. However, in reality, Taman Hutan Kota PLN cannot make a good performance as its function as public space and urban forest. To increase the level of people's happiness and develop urban quality at Medan, it is necessary to redesign Taman Hutan Kota PLN. The redesign’s purpose is to fulfill the people’s needs and hopes to this park and make better, satisfying, and responsive facilities to the user.  Redesigning Taman Hutan Kota PLN will be based on people's preferences, perceptions, and perspectives. The preference, people's opinions, and documentation on the field will help us to discover what is the real reality and important resource for redesigning process so that the final result of the new Taman Hutan Kota PLN design can be a better park not only as public space and open green space but also as an alternative recreation facility for people in Medan.

scholarly journals Urban, industrial and technological risks. Synthesis of the elements of vulnerability of the city of Hassi-Messaoud

2020 ◽  
Vol 12 ◽  
Author(s):  
Lahcene Bouzouaid ◽  
Moussadek Benabbas
Keyword(s):  
Urban Space ◽  
Job Search ◽  
Population Distribution ◽  
Risk Assessments ◽  
Demographic Development ◽  
New Approach ◽  
Different Types ◽  
Specific Factors ◽  
The City

Abstract Today, Algeria is one of the developing countries that are engaging seriously into a new approach consisting of all kinds of combined risk assessments for better prevention them. Note that, this is a fairly important parameter, that is, the safety of people and property. However, the magnitude of the risk, of whatever nature, affects a variety of diversified aspects (Human, economic, technical and environmental). This study presented a case study, which is sometimes paradoxical, seeing that it is the result of the combination of all risk factors and specific factors related to them connected to a fragile urban environment: Hassi-Messaoud. It is well known that Hassi-Messaoud is one of the most important city for Algeria's economy; in which the demographic development is mainly known by incessant flows of immigrants, motivated essentially by job search. This arbitrary of population distribution exposes this city to a certain danger; especially as Hassi-Messaoud is in a zone subject to a probable risk expressed here by being characteristic of an oil zone. Thus, this article aimed to provide elements of risk assessment related to oil activity. This approach could conclude that, through a schematic scale, the different types and levels of exposure and vulnerability could be identified, that is, characteristics of the urban space in question.

scholarly journals Wild orchids of Tyumen and challenges, related to their preservation

2021 ◽  
Vol 38 ◽  
pp. 00053
Author(s):  
Mariya Kazantseva ◽  
Sergei Artyomenko
Keyword(s):  
Plant Species ◽  
Small Groups ◽  
Urban Areas ◽  
Urban Forest ◽  
Municipal Services ◽  
Public Gardens ◽  
The Family ◽  
Forest Belts ◽  
Epipactis Helleborine ◽  
The City

There are 11 plant species of the Orchidaceae family in the city area of Tyumen; eight of them are protected in the Tyumen region, one species is included in the Red Book of Russia. Representatives of the family are found in the urban forest complex, roadside forest belts, on lawns and in public gardens of the central part of the city. Most species are represented locally by single specimens or small groups; three species – Epipactis helleborine, Platanthera bifolia and Neottianthe cucullata can form large complete coenopopulations. The main anthropogenous factors negatively affecting the condition of orchids in the city are: reconstruction of roads and plantations, regular mowing of grass in the habitats of plants. The protection of species requires coordinated efforts of municipal services for the improvement of urban areas and environmental organizations.

scholarly journals Ecosytem Services Assessment of Urban Forests of Adama City, Ethiopia

2020 ◽  
Author(s):  
Hingabu Hordofa Koricho ◽  
Ararsa Derese Seboka ◽  
Shaoxian Song
Keyword(s):  
Carbon Sequestration ◽  
Urban Environment ◽  
Carbon Storage ◽  
Azadirachta Indica ◽  
Eucalyptus Globulus ◽  
Carica Papaya ◽  
Urban Forest ◽  
Urban Forests ◽  
Pollution Removal ◽  
The City

Abstract Background: The recent urban challenges due to climate change and urban environment deterioration requires proper planning and inventories of urban forests. In this paper, trees and shrub information were used to estimate leaf area/biomass, carbon storage, carbon sequestration, pollution removal, and volatile organic compound (VOC) emissions, hydrological and functional values of Adama city urban forest. This study was conducted to assess and quantify the ecosystem services of urban forests of Adama city, Central Ethiopia.Results: The result of i-tree Eco model has indicated that the tree species such as Azadirachta indica, Eucalyptus globulus, Carica papaya and Delonix regia sequester high percentage of carbon which is approximately 14.7%, 7.4%, 7.3% and 6.2% of all annually sequestered carbon respectively. Besides, urban forests of the city was estimated to store 116,000 tons of carbon; the most carbons were stored by the species such as Eucalyptus globulus, Azadirachta indica, Carica papaya and Delonix regia that stores approximately 22.1%, 12.3%, 9.5% and 4.2% of all stored carbon respectively. Trees in Adama urban forests were estimated to produce 19.93 thousand tons of oxygen per year. It was estimated that trees and shrubs remove 188.3 thousand tons of air pollution due to O3, CO, NO2, PM2.5 and SO2 per year. In the city, 35 percent of the urban forest's VOC emissions were from Eucalyptus cinerea and Eucalyptus globulus. Besides, the monetary value of Adama urban forest in terms of carbon storage, carbon sequestration, and pollution removal was estimated to 16,588,470 ETB/yr, 118,283 ETB /yr and 12,162,701,080. 9 ETB /yr respectively.Conclusion: Urban forest of Adama city has significant contribution in terms of enhancing woody species diversity and the regulation of urban environment of the study area. From the management and conservation perspectives, urban forests of the study area needs consolidated interventions in terms of tree planting in bare areas and management works. Hence, reliable commitment should be demanded form the key stakeholders such as government, urban foresters and city dwellers.

Key natural impacting factors of China’s human population distribution

2007 ◽  
Vol 28 (3) ◽  
pp. 187-200 ◽  
Author(s):  
Min Chen ◽  
Chonggang Xu ◽  
Rusong Wang
Keyword(s):  
Human Population ◽  
Population Distribution ◽  
Impacting Factors
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