عنوان مقاله [English]
The fundamental changes of cities in their activities and their bodies during the past century have made their vital connection to nature losing. By 1950, urban areas contained 30% of the world's population, estimated to grow by more than 65% by 2050. Rapid urbanization has brought not only new migrants into urban areas but also gradually changed the physical environment of the city, which is noticeably felt in the urban canopy layer (UCL). This layer is strongly associated with the comfort of people.
In recent years, with the growth of urbanization, villages around towns have been linked to it, and as a result, vegetation in these areas has been lost due to construction. This issue has been threatened especially in Tehran due to the rapid expansion of the city. One of the main features of sustainable urban environments is their compatibility and adaptability with local climatic features. Therefore, before designing urban spaces and planning for it, it was necessary to fully understand the environment and to be aware of the effects of climate on the public spaces of the city. Although the microclimate contains a small area, its characteristics depend on the environment and can be improved. Studies show that the degree of heat and moisture of the earth's surface is affected by the vegetation, soil and shape of the land. Inactive methods are effective in improving the microclimate factors, including increasing vegetation cover, planting trees and creating ecological networks. This strategy was used in ancient cities, especially in the central cities of Iran, and inside these cities there were fewer temperatures compared to outside.
Ozgol is one of the northern neighborhoods of Tehran, where most of its green space has been lost due to its development and the quality of the neighborhood has decreased. In this paper, with logical reasoning and software evaluation, two conditions were considered for the neighborhood center. Regarding the neighborhood climate, simulations were carried out in two situations of status and proposed scheme and compared with each other. The PMV model is used to clarify the effect of plants in urban areas and changes that affect relative temperature, relative humidity and comfort conditions. The results show that, by allocating a small percentage of the city's space to greenery, it can greatly improve the comfort zone. Per square foot of green space in this neighborhood, 3.71 square meters can be placed below comfort level.
It may seem that with this approach, the level of public space in the comfort zone is less than expected, but only 32.8% of the entire site has public space and has the ability to interfere, and the rest of the site was personal property, so getting to this level is important, and the chosen day for simulation has had the highest temperature in the last ten years. On the other hand, lowering the temperature of 1.5 degrees seems more efficient than considering the issue of global warming over the past 100 years over a degree of temperature addition to the planet. Using this strategy will be more effective when it runs on large scale.