Estimate the Mitigation of Environmental Pollutant inBualistreet’s Multi-story Car Park of Qazvin by Green Walls

In recent decade, due the increase of cars emissions as well as Low per capita of green space, Pollutant concentrations has reached above the Public health standards in many developing cities of Iran. This problem led to an increase in sudden mortality rate in these urban areas. This situation in spaces with special functions such as multistory-car-parks is much more important. The expansion of Qazvin has led to an increase in the need for the parking facilities in dense urban areas. This problem has been solved by building underground and multi-story parking in these areas. Buali Street’s multi-story car parks are intended for economic exploitation in terms of land as well as meeting the need of parking space shortage for cars in one of the densest urban areas. Emissions caused by more than a thousand cars in the parking lot due to excessive condensation on parking site, increased the level of pollutants at this location. This problem needs to provide a way for reducing the level of pollutant and pollution.Nowadays vegetation is used as materials for building skin to mitigate the environmental problems. The green wall technology has wide application and significant benefits in term of Environments, saving energy, economy, psychology, reduced greenhouse gas emissions, prevention of heating islands, improve air quality, employment opportunities and aesthetic aspects. Given the role of plants in reducing urban pollutant and taking into account that urban green spaces and the trees on the edge of streets and parks can absorb pollutants only at low levels, so the possibility to create Vegetation at higher levels due to vertical growth of cities, can be an effective step in reducing the micron pollutants that has maximum concentration at the Levels above the ground and adjacent building openings. The system considered in this study is a special kind of green wall that includes climbing plants with a modular scaffold system that are used to provide support and direction for move the plants. To use this system in a building with multiple floors, such as those comes in this study we face, the plant that planted in a soil bed (medium), fixed to the part of the facades is required by using the support structure. After a few months (depending on the environmental conditions), the facade is covered with vegetation.This study intends to estimate the amount of contaminants arising from the cars’ emission in Bualistreet’s parking and determine the level of mitigation of pollution by green wall. The present study was based on a combination of library-based as well as statistical and numerical methods which are used to determine the concentration of carbon monoxide, lead and smokes in parking areas and to calculate the mitigation of these pollutants by big-leaf model. The result indicated that 1m2 of green wall on the Buali’s multi-story car park’s walls can reduced the emissions of pollutants in the 757.7μg per second. In other word these walls mitigated the air pollution in parking area as 26.1% and prevent them from being damaged.... Keywords: Multi storycar parks,Bualistreet of Qazvin, Pollutants, Green wall.