Anyachebelu, Ayina

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2019 - 201912020 - 20221
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  • Publication
    Who Gets Green in Philadelphia?: A Spatial Analysis of Philadelphia's Tree Distribution Program
    (2022-01-01) Anyachebelu, Ayina
    This study evaluates the equity of the tree distribution of Philadelphia’s yard tree program run by TreePhilly. The assessment focuses on the program’s ability to counteract the urban heat island effect based on land surface temperatures calculated using Landsat 8 satellite imagery as well as zoning specifications from the City of Philadelphia’s land use data, and socioeconomic characteristics from the American Community Survey on the census block group level. Disparities were identified using mapping, regression analysis, and spatial econometric models to determine the relationships between tree distribution and important factors such as temperature, race, income, and property characteristics. Overall, the study found that residential tree distribution was not equitable with regards to combatting the urban heat island effect and that more trees per square feet were planted in census block groups with higher white populations and lower density zoning classifications. This assessment will inform the local government on the effectiveness of its program and facilitate TreePhilly in determining where to target its outreach.
  • Publication
    Reducing Social Exclusion in Disadvantaged Urban Areas through Transportation
    (2019-08-30) Anyachebelu, Ayina
    Cities in both developing and developed nations have long struggled with marginalized members of their population unable to access employment, education, and opportunities needed for social mobility. This limited access to opportunities transcends the globally acknowledged issue of urban inequality. Scholars refer to the phenomenon as social exclusion, involving the lack or denial of resources, rights, goods and services, and the inability to participate in the normal relationships and activities, available to the majority of people in society. Medellín, Colombia suffered from social exclusion for decades with drug cartels, gangs, and military groups leaving isolated communes entrenched in violence and poverty. However, the city has reinvented itself since the twenty-first century with innovation in public transportation and urban policy that have integrated these communes with the rest of the city, spurring growth and reducing violence. A study of Medellín’s transformation reveals the significance of mobility, social interventions, and the government’s collaboration with residents and the private sector in decreasing social exclusion. Medellín presents an example for other cities in need of engaging with their citizens to reduce marginalization and foster urban prosperity.