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Climate Change Adaptation: Assessment and Simulation for Hot-Arid Urban Settlements – The Case Study of the Asmarat Housing Project in Cairo, Egypt

  • Mohsen Aboulnaga
  • Amr Alwan
  • Mohamed R. Elsharouny
Chapter
Part of the Innovative Renewable Energy book series (INREE)

Abstract

Urban areas in hot-arid climatic zones, especially in Egypt, are facing real challenges in responding to heat island effect, providing thermal comfort and adapt to climate change (CC) impacts. Such challenges are mounting due to CC risks that are manifested worldwide, e.g., severe storms that recently slashed the Gulf of Mexico, Texas, and Florida, USA. Metrological data indicate that the increase in hot summer days would result in rapid multiplication in heat stress, death cases, and economic impacts. A severe event was observed in Cairo, Egypt, in August 2015, where air temperature was recorded high 49 °C above the normal temperature for 10 days, hence resulting in 200 cases that were hospitalized from heat stress and 98 deaths. The CC direct risks are not only limited to urban areas and public health. Due to the fact that Egypt is highly dependent on fossil fuels to produce electricity, GHG emissions, mainly CO2 will be significantly increasing. Therefore, sustainable and green measures and actions are vital to be considered and implemented in all sectors. Under such adverse CC impacts, it is necessary for all stakeholders to examine current urban projects in order to assess their ability to respond to CC adaptation measures. This paper presents the assessment of a low-income housing settlement that was recently built in Cairo. The Asmarat project is selected as the case study to simulate the long-term impact of CC scenarios by 2080 on one of the capital’s urban settlements and to test the role of passive cooling configurations in mitigating CC effect in cities to identify possible countermeasures. Simulation programs ENVI-met and DesignBuilder were used to assess and measure the resilience and sustainability of the selected urban project. The study simulates the urban microclimate in terms of the urban form by 2016 and 2080 to evaluate CC impact. Six measures were tested including passive cooling design configurations, building elevation, buildings’ envelops, vegetation, and water features, and orientation and high albedo were tested, and results were presented. These findings address adaptation policies, actions and measures, and simulations of the role of buildings’ retrofitting and cities’ upgrading in coping with CC mitigation/adaptation to narrow the information gap and yet understand the challenges facing the adaptation measures in hot-arid zones. The changes in climatic parameters resulted in an increased magnitude of thermal discomfort by 1 point on the PMV thermal sensation scale in the built environment within hot-arid climate zones. In addition, results indicate that adaptation measures through buildings’ retrofitting and upgrading cities’ strategies played a vital role in adapting with CC risks through the enhancement of outdoor and indoor thermal comfort and mitigating CO2 emissions.

Keywords

Climate change adaptation Climate change scenarios Urban microclimate simulation Coupling methodology Retrofitting Hot-arid climate Urban settlement Urban cooling loads Egypt 

References

  1. 1.
    Elwan A et al (2014) An outdoor-indoor coupled simulation framework for climate change–conscious urban neighborhood design. Sage Publications ltd stm 90(8):874–891Google Scholar
  2. 2.
    Yi C et al (2014) Microclimate change outdoor and indoor coupled simulation for passive building adaptation design Elsevier B.V. Procedia Computer Science 32:691–698Google Scholar
  3. 3.
    Weisser D (2007) A guide to life-cycle greenhouse gas (GHG) emissions from electric supply technologies. Elsevier 32(9):1543–1559Google Scholar
  4. 4.
    DesignBuilder 2.1: user’s manual (2009). Retrieved April 10, 2017, from DesignBuilder Ltd: http://www.designbuildersoftware.com/docs/designbuilder/DesignBuilder_2.1_Users-Manual_Ltr.pdf.
  5. 5.
    DesignBuilder Software Ltd (2017) DesignBuilder-simulation made easy. Retrieved 14 April 2017, from www.designbuilder.co.uk/
  6. 6.
    Fahmy M et al (2017) On the green adaptation of urban developments in Egypt; predicting community future energy efficiency using coupled outdoor-indoor simulations. Elsevier 153:241–261Google Scholar
  7. 7.
    Holmer I (2008) PMV 2008 ver 1.0. Retrieved 14 May 2017, from http://www.eat.lth.se/fileadmin/eat/Termisk_miljoe/PMV-PPD.html
  8. 8.
    Walsh J et al (2010) Ch. 2: our changing climate. Climate change impacts in the United States. In: The third national climate assessment. Global Change Research Program, pp 19–67.  https://doi.org/10.7930/J0KW5CXT
  9. 9.
    Kaarin Taipale et al. (2012). Challenges and way forward in the urban sector: Sustainable Development in the 21st century (SD21). (Division for Sustainable Development of the United Nations) Retrieved April 20, 2017, from https://sustainabledevelopment.un.org/content/documents/challenges_and_way_forward_in_the_urban_sector_web.pdf
  10. 10.
    Bruse M (2009) ENVI-met 3.1 Help system. Retrieved 16 April 2017, from www.envi-met.com/documents/onlinehelpv3/helpindex.htm/
  11. 11.
    Bruse M (2014) LEONARDO 2014. Retrieved 12 April 2017, from http://www.model.envi-met.com/hg2e/doku.php?id=leonardo:start
  12. 12.
    Elnabawi M (2013) Use and evaluation of the ENVI-met model for two different urban forms in Cairo, Egypt: measurements and model simulations, Chambéry, France: 13th Conference of International Building Performance Simulation AssociationGoogle Scholar
  13. 13.
    MoIC (2016) National review sustainable development goals. Ministry of International Cooperation, CairoGoogle Scholar
  14. 14.
    NREL (2017) Weather data by location. (National Renewable Energy Laboratory ) Retrieved 4 March 2017, from https://energyplus.net/weather-location/africa_wmo_region_1/EGY//EGY_Cairo.Intl.Airport.623660_ETMY/
  15. 15.
    Phil Katzan et al. (2017). Protecting Health from Heat Stress in Informal Settlements of the Greater Cairo Region. (Deutsche Gesellschaft für, Internationale Zusammenarbeit (GIZ) GmbH) Retrieved March 15, 2017, from https://health.bmz.de/what_we_do/climate_health/Vulnerability_assessments/50_va_cairo/Qualitative_vulnerability_and_adaptation_assessment_Cairo_2016.pdf
  16. 16.
    SERG. (2013). Climate change world weather file generator. (Sustainable Energy Research Group, University of Southampton) Retrieved April 5, 2017, from http://www.energy.soton.ac.uk/files/2013/06/manual_weather_tool.pdf
  17. 17.
    SERG (2017) CCWeatherGen: climate change weather file generator for the UK. Retrieved 16 May 2017, from http://www.energy.soton.ac.uk/ccweathergen/
  18. 18.
    UNGA. (2008). Climate Change and The Most Vulnerable Countries: The Imperative to Act. (United Nations General Assembly) Retrieved May 2, 2017, from http://www.un.org/ga/president/62/ThematicDebates/ccact/vulnbackgrounder1July.pdf
  19. 19.
    WGII AR5. (2014). Climate Change 2014 Synthesis Report Summary for Policymakers. (Cambridge university press) Retrieved February 12, 2017, from https://www.ipcc.ch/pdf/assessment-report/ar5/syr/AR5_SYR_FINAL_SPM.pdf

Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Mohsen Aboulnaga
    • 1
  • Amr Alwan
    • 2
  • Mohamed R. Elsharouny
    • 3
  1. 1.Sustainable Built Environment, Department of ArchitectureCairo UniversityGizaEgypt
  2. 2.Department of ArchitectureFaculty of Engineering, Military Technical CollageCairoEgypt
  3. 3.M.Sc. in Environmental Design and Energy Efficiency, Department of Architecture, Faculty of EngineeringCairo UniversityGizaEgypt

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