Would LEED-UHI greenery and high albedo strategies mitigate climate change at neighborhood scale in Cairo, Egypt?

Fahmy, M. A. H.; Ibrahim, Yasser; Hanafi, Ehab; Barakat, Mohamed

doi:10.1007/s12273-018-0463-7

Cited by 40 publications

(25 citation statements)

References 42 publications

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“…This tree is commonly found in Cairo, as it is well-adapted to hot climates, it is a deciduous tree frequently used in urban parks, and it provides sufficient shade in the summer and heat in the winter, when its leaves fall [29]. The detailed inputs required in the ENVI-met tool, such as the Leaf Area Index (LAI) and albedo, were adapted from the measured values given in [30]; see Table 2. This tree was modeled and added to ENVI-met 3D plants database, following the work of Fahmy et al [26,27] using the Albero tool inside the ENVI-met software.…”

Section: Urban Treesmentioning

confidence: 99%

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Solar Irradiance Reduction Using Optimized Green Infrastructure in Arid Hot Regions: A Case Study in El-Nozha District, Cairo, Egypt

2021

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In the Middle East and North Africa (MENA) region, studies focused on the relationship between urban planning practice and climatology are still lacking, despite the fact that the latter has nearly three decades of literature in the region and the former has much more. However, such an unfounded relationship that would consider urban sustainability measures is a serious challenge, especially considering the effects of climate change. The Greater Cairo Region (GCR) has recently witnessed numerous serious urban vehicular network re-development, leaving the city less green and in need of strategically re-thinking the plan regarding, and the role of, green infrastructure. Therefore, this study focuses on approaches to the optimization of the urban green infrastructure, in order to reduce solar irradiance in the city and, thus, its effects on the urban climatology. This is carried out by studying one of the East Cairo neighborhoods, named El-Nozha district, as a representative case of the most impacted neighborhoods. In an attempt to quantify these effects, using parametric simulation, the Air Temperature (Ta), Mean Radiant Temperature (Tmrt), Relative Humidity (RH), and Physiological Equivalent Temperature (PET) parameters were calculated before and after introducing urban trees, acting as green infrastructure types that mitigate climate change and the Urban Heat Island (UHI) effect. Our results indicate that an optimized percentage, spacing, location, and arrangement of urban tree canopies can reduce the irradiance flux at the ground surface, having positive implications in terms of mitigating the urban heat island effect.

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Section: Urban Treesmentioning

confidence: 99%

“…Proposed tree specification. LAI was adopted from [30], geometry gathered from [30], and LAD values were calculated based on [31] for Cassia nodosa.…”

Section: Urban Treesmentioning

confidence: 99%

Solar Irradiance Reduction Using Optimized Green Infrastructure in Arid Hot Regions: A Case Study in El-Nozha District, Cairo, Egypt

2021

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“…Urban heat islands have been investigated in Cairo from a thermal effect point of view in the work of Hamid et al [73] and it was found that Land Surface Temperature (LST) which is the Surface Urban Heat Island (SUHI) in new towns is 2 K warmer than in Cairo due to the non-uniform distribution of urbanization. Moreover, the study indicates that the selection of suitable rural references in SUHI studies is an important in a desert city with significant landscape and surface difference with their most surrounding areas such as Cairo.…”

Section: Uhi Mitigationmentioning

confidence: 99%

“…In the study of Fahmy et al [73], the mitigation of UHI took place in Cairo in present and future by the application of tree lines, green roofs, high albedo pavements and shading structures mentioned in the green rating system LEED-ND, and the microclimatic numerical model ENVI-met was the assessment method. The study proved the efficiency of using selected Egyptian trees lines in UHI mitigation in present and under climate change scenarios until the end of century (2020, 2050 and 2080) in terms of air and radiant temperature reductions.…”

Section: Uhi Mitigationmentioning

confidence: 99%

“…Due to increase in population that are expected to live in urban areas, as well as, the increase in air temperature because of the changing climate [115], it is crucial to establish an adaptive and responsive thermally efficient built environment by means of implementing passive design strategies at both building and urban scales. At the urban scale, reducing energy consumption in buildings and alleviating the urban canyon temperature is an integration of several passive design strategies such as trees [3,59,60,116], green roofs [69,73,117,118], green walls, and the fabric of local micro-climate scale [44,[119][120][121]. Based on these studies, the energy consumption of the whole examined urban forms and the housing typologies is proposed to be passively reduced through design, and the remaining energy demand can be met by renewable energy systems.…”

Section: Present Housing Typologies; With or Against The Climate Respmentioning

confidence: 99%

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A Review and Insights for Eleven Years of Urban Microclimate Research Towards a New Egyptian ERA of Low Carbon, Comfortable and Energy-Efficient Housing Typologies

et al. 2020

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Since the mid-1970s, urban development in Egypt has sprawled far from the distinguished compact arid built environment, as the court-yarded housing typologies that completed the vernacular picture of desert architecture have been discarded in the early 20th century. This has motivated urban microclimate research in Egypt. The main objective was initially to improve outdoor thermal comfort. Therefore, Egyptian research started with assessing different existing patterns for the sake of climate responsive and sustainable urban design practice characterized with low carbon, thermal comfort and energy efficiency in such a hot arid conditions. That is why the review workflow of this article has followed a design progress workflow that led to solving design complexities with regard to generating housing urban forms on a microclimate basis rather than an article regular review workflow in order to extract the research gaps and conclude insights. After discussing a general framework for generating housing sustainable design identified from the concluded gaps, the main conclusion is a vision and a call to integrate the Urban microclimate-Building passiveness-Renewables design dimensions, UBR, towards the evolution of a new era of energy efficient housing typologies and a 5th generation of Egyptian sustainable cities where the 1st generation of new Egyptian cities started 1970s.

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Urban Green Coverage as a Strategy for Mitigating High Temperatures in Cities

Aboulnaga,

Trombadore,

Mostafa

et al. 2024

Livable Cities

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Would LEED-UHI greenery and high albedo strategies mitigate climate change at neighborhood scale in Cairo, Egypt?

Cited by 40 publications

References 42 publications

Solar Irradiance Reduction Using Optimized Green Infrastructure in Arid Hot Regions: A Case Study in El-Nozha District, Cairo, Egypt

Solar Irradiance Reduction Using Optimized Green Infrastructure in Arid Hot Regions: A Case Study in El-Nozha District, Cairo, Egypt

A Review and Insights for Eleven Years of Urban Microclimate Research Towards a New Egyptian ERA of Low Carbon, Comfortable and Energy-Efficient Housing Typologies

Urban Green Coverage as a Strategy for Mitigating High Temperatures in Cities

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