Improving Pedestrian Thermal Comfort Using Optimized Urban Trees Pattern in Aswan City

Abstract

For long periods last years, the majority of cities suffer from exceptionally hot- dry climate. However, the most urban patterns within these cities are unsuitable for these severe occurrences and raise the value of the Urban Heat Island (UHI). The goal of this study is to see how UHI mitigation options affect outdoor human thermal comfort in three different forms of frequent urban trees patterns in the world’s most populous city in Egypt, Aswan. The ENVI-met model was utilised to assess meteorological using simulation climate program (Ecotect Analysis), buildings and vegetation distribution, using Pupulus Alba. All measurements were taken in a pedestrian walkway at the microclimate case study (case 1. without trees, case 2. distribution trees each 8m total coverage 50%, case 3. distribution trees each 12m total coverage 21.5% were conducted to measure, relative humidity, mean radiant temperature, wind speed, air temperature and prediction mean vote as a key indicator for human thermal comfort. This study provided a better understanding of the role of Urban Heat Island UHI mitigation strategies on human thermal comfort in the outdoor spaces of Aswan’s residential neighborhoods. The simulation results revealed high thermal comfort and discomfort after setting 3 cases for trees pattern for the climate and the possible vegetation (trees patterns). This result indicate that an optimized percentage of urban trees pattern can mitigate (UHI) effect and clear the role that urban trees serve in modifying microclimates.