Delineating and Assessing Urban Green Infrastructure in Cities: Application of the Patch Matrix Model in Alexandria, Egypt

Abdel-Gawad, Esraa and Ayad, Hany M. and Saadallah, Dina (2022) Delineating and Assessing Urban Green Infrastructure in Cities: Application of the Patch Matrix Model in Alexandria, Egypt. Mobility, Knowledge and Innovation Hubs in Urban and Regional Development. Proceedings of REAL CORP 2022, 27th International Conference on Urban Development, Regional Planning and Information Society. pp. 219-228. ISSN 2521-3938

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Cities face crucial issues related to urbanisation, declining quality of life, inadequate infrastructure, and ecosystem degradation. Those issues have huge impacts on the health and wellbeing of communities. In response, the World Health Organisation (WHO) recommends granting each person in a city a minimum of 9 m2 of urban green spaces that are functional. Many cities face challenges to achieve this requirement due to limited green public areas and their under-exploration as green infrastructures. In Egypt, due to high urbanisation rate and increased densification, some cities, particularly large ones, are struggling to provide a proper share of open spaces per capita. Exploring and promoting urban green spaces in cities could contribute to an improved quality of life (QOL) and ecosystem services. In this respect, “urban green infrastructure” (UGI) responds to such issues by offering opportunities that attempt to preserve values and functions of ecosystems, as well as solutions to support biodiversity and urban healthy environments. This research focuses on green spaces as a main component of UGI in Alexandria, Egypt's second-largest city, through the application of the Patch Matrix Model (PMM). Since the 1980s, PMM has been a fundamental principle in landscape ecology, as it describes the horizontal landscape structure in a simple practical way by delineating homogeneous areas and by quantitatively assessing their spatial arrangement and diversity. It is proposed to adopt PMM to classify and analyse UGI on an urban scale in Alexandria's Al Montazah district. Using remotely sensed data, Esri Sentinel-2 Land Cover maps, as well as existing local spatial information systems, delineation of existing and potential patches, corridors and matrices is performed. Homogenous areas of open spaces are analysed in terms of their shape, size, and functions. Linear spaces in the city are also investigated and the spatial arrangement of the PMM components is developed. Based on the implementation on a highly urbanised district, discussions extend to the potential and limitation of this approach for quantifying urban landscape patterns. The research results confirm the validity of PMM in delineating and providing scenarios for UGI development, and in proposing a tactic plan for city-scale interventions.

Item Type: Article
Uncontrolled Keywords: Urbanization, Urban green spaces, Patch Matrix Model, Urban Green Infrastructure, Landscape ecology, Ecosystem
Subjects: G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GE Environmental Sciences
Depositing User: The CORP Team
Date Deposited: 10 Nov 2022 12:07
Last Modified: 18 Dec 2022 14:18

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