The Simulation of “Natural Ventilator of the City” Model by Using ENVI-met to Mitigate the Effect of Urban Heat Island in Tehran Metropolitan Area
Parisa Shahmohamadi1, Ulrich Cubasch1, Sahar Sodoudi1, A.I. Che-Ani2
1 Institut für Meteorologie, Freie Universität Berlin, Germany
2 Department of Architecture, Faculty of Engineering and Built Environment,
Universiti Kebangsaan Malaysia, Selangor, Malaysia
Natural Ventilator of the City (NVC) model has been recommended by this paper to mitigate the UHI intensity in Tehran metropolitan area. The main aim of this model is to achieve ideal condition with zero effects of UHI. In order to achieve this condition, hypothesis has been considered which if the half of 6 urban district of Tehran covers with vegetation covers and high albedo materials, it could be approached to this condition. 6 urban district, as a central district of Tehran, is one of the polluted areas which plays an important role on formation of UHI. Providing different kinds of greenery such as balcony gardens, green roofs and vertical and horizontal landscape in barren and urban lands along with using higher albedo materials can convert 6 urban district into the central ventilator. In this way, providing this natural ventilator in 6 urban district can affect the surrounding areas and mitigate the UHI intensity in whole part of the metropolitan area. Therefore, in order to prove whether the ideal condition is achievable or not, simulation of NVC model by using the micro scale climate model ENVI-met has been done. The result will be presented and discussed.
Key Words: ENVI-met, Natural Ventilator of the City Model, Urban Heat Island.