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  • br City Prosperity Manifest Cities have been

    2018-11-02


    City Prosperity Manifest Cities have been perceived as the engines of a country׳s economy, creativity, well-being, and development. For decades, economic growth was considered the key factor to development policies. However, city prosperity currently looks beyond this perspective and examines how a city can equitably produce and redistribute its benefits. Promoting economic growth is further emphasized, including social cohesion, environmental sustainability, and quality of life (UN-Habitat, 2012). The UN-Habitat report introduces a new statistical instrument, namely, the City Prosperity Index (CPI), to measure prosperity in five dimensions: Productivity, Infrastructures, Quality of Life, Equity and Social Inclusion, and Environmental Sustainability. Five main dimensions exist in the city prosperity manifest. Each dimension consists of some sub-indices and variables employed in measuring the numerical value of CPI. Some of these variables are statistical and cannot be applied to architectural design or programming. Therefore, these variables are excluded from the study (Fig. 2).
    Tehran Healthy Building Design Decisions According to the Statistical Center of Iran (SCI, 2014), the rate of residential building construction in Tehran has increased significantly since 1980. The energy consumption per capita for Iranian families is also significantly higher than the ideal average rate for Middle Eastern countries (SCI, 2013). The most severe thermal loss in the present residential buildings of Tehran is found to be throughout the windows (50%) and walls (35%), in apexbio dilution to the floors (7.5%) and ceilings (7.5%) (Sadegh Zadeh, 2007). Therefore, using architectural strategies to consider the insulation of windows and walls results in an impressive reduction in energy costs and, consequently, household consumption. Moreover, avoiding curvature forms and creating shadows on the southern facade of buildings in Tehran result in significant energy saving (Shafiee et al., 2013). Conversely, the lack of adequate infrastructures in houses and poor quality of design and construction in low-income areas of the city have led to low-quality buildings, which are commonly houses that fuel the slum expansion. This deficiency would further increase the level of energy consumption each year. Innovative self-help construction methods appear to be a solution to improve housing in these troubled areas. According to SCI (SCI, 2013), the building sector contributes approximately 25% of the overall imposed costs caused by the production of CO2. In Tehran, an average of 50% of the urban space is dedicated to residential use (Behzadfar, 2011). Consequently, 40% of this amount of residential space is dedicated to home yards according to the Tehran municipal construction regulations. Building green spaces in house yards has a strong potential to compensate for the vast household CO2 emission through buildings themselves. This strategy can also be applied to green spaces in front of the building, given that they are eliminated in recent constructions. The strategy of providing a beautiful green vista is expected to have medium-term positive impacts on the physical health of the society and the mental health of occupants. The building industry is known as one of the major culprits of environmental degradation in most Iranian populated cities, given that two to three buildings per alley are under construction every year. In Tehran, nearly 40% of municipal solid waste is construction waste (SCI, 2009). According to the Iran Statistical Center (SCI, 2013), buildings consume some 36% of the total energy use in Tehran, the highest consumption rate compared with other sectors (industry, transport, and agriculture). However, the portion of producing renewable energies in the same year by this sector is 0.23%, which is highly negligible (SCI, 2013). Improving the energy efficiency of buildings and reducing building energy consumption in Tehran are clearly urgent problems for the construction industry. Improving energy efficiency in buildings demands an extensive discussion, which must focus on how to replace common, easy-to-use, active energy-consuming systems with passive solutions. Considering that over 70% of the building energy consumption aims to support cooling systems in hot climate cities of Iran, such as Tehran, strategies such as the increased southern façade in compliance with Trombe wall and solar space should be encouraged to support passive solar systems in the housing sector (Pour Mirza, 2010). Moreover, state interventions proposing strategies to reduce municipal service fees and costs for constructing greenhouses can foster the green development policies and their embodiment within the currently neglected residential buildings in Tehran. Iran is highly lacking on water resources. This problem is more significant in dry-climate populated cities, such as Tehran. Reusing and collecting water resources are relatively vital strategies in such cities. The current water-sewerage system in Tehran fails to separately provide clean drinking water and water used for other purposes, such as cleansing activities. Consequently, researchers suggest that separating drinking water in buildings can save up to 80% of the energy and effort put into providing drinking water for all purposes. Reusing gray water from cleansing activities in kitchens, bathrooms, and so on can also save up to 50% of the total water consumption in Tehran (Moqadasi, 2009).