Journal
EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES
Volume 24, Issue 3, Pages 343-351Publisher
ELSEVIER
DOI: 10.1016/j.ejrs.2020.07.002
Keywords
Urban greenness index; Above ground biomass; SPOT 6; Platanus xacerifolia Jacaranda mimosifolia
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Funding
- Wits School of Governance (WSG) at the University of the Witwatersrand [2858]
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The importance of urban green space in urban planning and design has grown, with advancements in remote sensing technology allowing for better evaluation and management. A study in Johannesburg, South Africa compared the urban greenness index between affluent and poor areas, highlighting ecological disparities and providing valuable insights for future urban planning and policy formulation.
The importance of urban green space has over the years grown into an indispensable component of green infrastructure incorporated in urban planning and design as investment to promote the well-being of city dwellers. The continuous advancement in remote sensing spatial and spectral resolutions has made it possible to effectively map and evaluate urban green space for better management. The urban greenness index between the affluent suburb of Rosebank in the north and the poor Township of Soweto in the south, of Johannesburg city was assessed and compared to determine the environmental quality between the two areas. The total above ground biomass (AGB) of the two predominantly occurring street trees, Jacaranda mimosifolia and Platanus x acerifolia in Rosebank was estimated using existing allometric equa-tions for the respective species. An equation was derived from the correlation of normalized difference vegetation index (NDVI) values extracted from SPOT 6 image and AGB of Rosebank. The same equation was then used to extrapolate and estimate the AGB of Soweto. The results showed that Rosebank had the lowest total AGB of approximately 113,179 ton, while that of Soweto was approximately 504,400 ton. However, the greenness index of Rosebank (83%) was greater than in Soweto (14%), indicating a pat-tern of ecological disparity between the two areas. These findings could be useful for designing a sound urban planning and policy formulation for the city of Johannesburg. (c) 2020 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B. V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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