scholarly journals Urban Green Space Suitability Evaluation Based on the AHP-CV Combined Weight Method: A Case Study of Fuping County, China

2018 ◽  
Vol 10 (8) ◽  
pp. 2656 ◽  
Author(s):  
Zhiming Li ◽  
Zhengxi Fan ◽  
Shiguang Shen
Keyword(s):  
Green Space ◽  
Central City ◽  
Urban Green Space ◽  
Ahp Method ◽  
Rapid Urbanization ◽  
Urban Green ◽  
Suitability Evaluation ◽  
Mountainous Regions ◽  
Weight Method

Urban green space (UGS) provides critical ecosystem services and alleviates environmental problems caused by rapid urbanization. The Analytic Hierarchy Process (AHP) method is recognized as a traditional technique to identify the weight of the UGS suitability evaluation. We reveal the limitations of the AHP method for its subjectivity and uncertainty. Then, we introduce the AHP and coefficient of variation (AHP-CV) combined weight method to better evaluate the suitability of UGS. Based on the principle of minimum information entropy, the AHP-CV combined weight method takes advantage of both the AHP and CV methods, thus keeping a good balance between subjectivity and objectivity. We used the green space system planning of Fuping County in China as a case study. A new evaluation index system was established using 4 aspects. Our results show that high-suitability areas are mainly distributed around the northern mountainous regions, 2 important rivers and the outer areas of the central city. By comparing the UGS suitability evaluation results obtained by the AHP, CV, and AHP-CV combined weight methods, we found that the AHP-CV method was optimal. Therefore, the AHP-CV combined weight method will not only enrich spatial Multi-Criteria Decision-Making techniques but also have a wide application in the related fields of land-use planning.

A city on the edge: the political ecology of urban green space

2021 ◽  
pp. 095624782110198
Author(s):  
Patrick Brandful Cobbinah ◽  
Valentina Nyame
Keyword(s):  
Political Ecology ◽  
Green Space ◽  
City Planning ◽  
Institutional Culture ◽  
Urban Green Space ◽  
Rapid Urbanization ◽  
Urban Green ◽  
Political Interference ◽  
Research Questions

African cities, faced with rapid urbanization and haphazard land use practices, struggle to address their fast-declining urban green space (UGS). Yet the spatial extent of UGS, and the influence of city planning legislation and frameworks, remains largely unexplored. Using a case study of Kumasi, Ghana, this study draws on mixed methods to address three research questions: (i) How did Kumasi’s UGS evolve from 1991 to 2019? (ii) How do city planning, legislation and the regulatory framework influence UGS management? (iii) What is the land governance institutional culture for managing UGS? Findings from the spatial analysis indicate a loss of over 80 per cent in Kumasi’s UGS between 1991 and 2019. Although unplanned urbanization, poor urban planning and political interference were frequently discussed as contributory factors, the foundational cause was found to lie in the complex and conflicting relationship between land governance agencies. This situation has resulted in the absence of a culture of coordination with regard to urban development, particularly towards UGS.

scholarly journals Air Pollution and Urban Green Space: Evidence of Environmental Injustice in Adama, Ethiopia

2021 ◽  
Vol 3 ◽  
Author(s):  
Erin Flanagan ◽  
Kristoffer Mattisson ◽  
John Walles ◽  
Asmamaw Abera ◽  
Axel Eriksson ◽  
...  
Keyword(s):  
Air Pollution ◽  
Green Space ◽  
Urban Green Space ◽  
Sub Saharan Africa ◽  
Household Air Pollution ◽  
Environmental Injustice ◽  
Rapid Urbanization ◽  
Urban Green ◽  
Air Pollution Exposure ◽  
Pollution Exposure

While air pollution data in Ethiopia is limited, existing studies indicate high levels of both ambient and household air pollution; rapid urbanization also threatens the preservation of urban green spaces. In this study, environmental injustice, or the disproportionate burden of environmental exposures on persons of lower socioeconomic status (SES), was explored among women in Ethiopia using a mother and child cohort from the city of Adama. Land-use regression models were previously developed for modeling ambient nitrogen dioxide (NO2) and nitrogen oxides (NOx) throughout Adama, while household air pollution (cooking fuel type) and the presence of green space were assessed through questionnaires and home visits, respectively. The odds of being exposed to these environmental factors were analyzed in association with two SES indicators, education and occupation, using logistic regression. Our results indicate the presence of environmental injustice in Adama, as women with lower SES shouldered a higher burden of air pollution exposure and enjoyed less urban green space than their higher SES counterparts. These findings encourage the prioritization of air quality control and urban planning resources toward policy action within lower SES areas. From a societal perspective, our results also support more upstream interventions, including investment in educational and occupational opportunities. Still, a human rights approach is emphasized, as governments are responsible for protecting the right to a clean environment, especially for those disproportionately exposed. To the best of our knowledge, this is the first study on environmental injustice in Ethiopia, and the first in Sub-Saharan Africa to investigate the inequalities of ambient and household air pollution exposure as well as urban green space access in the same cohort.

Study on Urban Green Space System Planning Based on Ecological Suitability Evaluation: A Case of Luancheng City in China

2011 ◽  
Vol 368-373 ◽  
pp. 1788-1793
Author(s):  
Shi Guang Shen ◽  
Hao Wang ◽  
Jun Fei Wen ◽  
Si Hui Wang ◽  
Chen Jing Fan
Keyword(s):  
Green Space ◽  
Evaluation Model ◽  
Subjective Evaluation ◽  
Urban Green Space ◽  
Suitability Analysis ◽  
Space System ◽  
System Planning ◽  
Urban Green ◽  
Suitability Evaluation ◽  
Ecological Suitability

For a long time, planners get used to apply qualitative analysis and subjective knowledge to define urban green space system. Lacking support of quantitative analysis, the incomplete inventory will result in subjective evaluation, low pertinence. And the required depth and level for planning will not be strong enough. This study strives for introduce ecological suitability evaluation to urban green space system, derives the supporting theory, framework, and evaluation model. By using GIS, Luancheng green space system is generated based on the ecological suitability analysis. Also, this study shows that green space system planning is more operational and reliable based on ecological suitability evaluation.

scholarly journals Demand of urban green space cool islands based on heat island pattern: A case study of Chaoyang District of Beijing

资源科学 ◽  
2019 ◽  
Vol 41 (8) ◽  
pp. 1541-1550
Author(s):  
Yunting SHI ◽  
Biao ZHANG ◽  
Jixi GAO ◽  
Yue TONG ◽  
Shanshan SHAO ◽  
...  
Keyword(s):  
Green Space ◽  
Urban Green Space ◽  
Heat Island ◽  
Urban Green
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