ENVIRONMENTAL QUALITIES OF UNDERGROUND TRANSITION SPACES IN MUMBAI

Underground system have been constructed to improve the quality of public transportation and considered to be the most convenient mode of pedestrian transportation in the World. But these spaces are sensitive in terms of Environmental quality. This paper based on research of Environmental quality of underground transition spaces in Mumbai. Since people spend a considerable amount of time in Churchgate, CST subway daily, there has been growing concern over the regulation of indoor air quality. Various types of pollutant like Particulate Matter, Carbon di oxide remain accumulated in the subway due to heavy use, overcrowding and inadequate indoor ventilation system. Key aspects that could have an influence on underground space design include: accessibility and closest surrounding, orientation and spatial proportions, human comfort, natural and artificial lighting, material and colors, noise levels and air quality. The aim of research paper is to design strategy based on continuous monitoring for three working days in order to construct data base for understanding the actual condition during rush hours. A ventilation system is widely used to control indoor air quality in underground subway. After studying Metro,Churchgate,CST and Borivali shows that increasing mechanical ventilation can help to cool the environmental comfort. However improper ventilation leads to hazardous pollutant accumulation and also has negative health impact.