World Applied Sciences Journal 19 (10): 1523-1531, 2012 ISSN 1818-4952 © IDOSI Publications, 2012 DOI: 10.5829/idosi.wasj.2012.19.10.1161 Investigation of Sustainable Architecture in Arid Zones (Case Study: Ardestan City) 1 K. Yazdi, 2P. Nazeri Naeini and 3R. Hekmatpanah Ardestan Branch, Islamic Azad University, Ardestan, Iran Dehaghan Branch, Islamic Azad University, Dehaghan, Iran 3 Young Researchers Club, Ardestan Branch, Islamic Azad University, Ardetan, Iran 1 2 Abstract: Our modern culture, which is an upshot of mankind’s contact with the nature throughout the history, is based on the past knowledge and experiences. In today’s world, the considerable attraction of the developed cultural domains and the high speed of economic and cultural interactions have hindered us from noticing various aboriginal life styles. The climatic conditions have matured mankind in how to cope with region-specific problems by using elements of the same region and devising tools and methods appropriate to their needs in interaction with the regional climate. The major goals of sustainable architecture and its resulting sustainable development are to provide for the basic needs of mankind, to improve the standard of life, to better preserve and maintain the ecosystems and natural energy resources and finally to reach a safer future. The present study looks at the relationship between the desert traditional buildings and sustainable development as well as the climatic conditions and construction patterns in Ardestan district. This study is both descriptive and analytic. First some information is collected from different parts, next this bulk of data goes under descriptive and analytic scrutiny at three stages of data collection and statistics, data processing and data analysis. Key words: Sustainable architecture Ecological designing architecture Ardestan district INTRODUCTION Our modern culture, which is an upshot of mankind’s contact with the nature throughout the history, is based on the past knowledge and experiences [1]. Nowadays, sustainable development is concentrated due to climate change and destroying the nature by human [2] and on other hand, 'Green' or 'ecological' architecture is the inexorable trend of sustainable urban development [3]. The climatic conditions have matured mankind in how to cope with region-specific problems by using elements of the same region and devising tools and methods appropriate to their needs in interaction with the regional climate [4]. The major goals of sustainable architecture and its resulting sustainable development are to provide for the basic needs of mankind, to improve the standard of life, to better preserve and maintain the ecosystems and natural energy resources and finally to reach a safer future [5]. Significant parts of residential areas in Iran are towns and cities located in desert areas. These cities have been highly exposed to major changes caused by modern Corresponding Author: Natural resources and energies Climatic methods of urban architecture and designing in the last three decades. Since the process of modernism in Iranian architecture and after formation of the postmodernist thought, tendency to apply some of the principles, concepts and elements of traditional architecture became widespread [6]. Modern interferences, such as executing comprehensive urban plans, road-widening projects, etc [7], have had undesirable consequences, either on architecture scale or spatial structuring scale and the body organizing of desert cities. Urban expansion is one of the key factors in changing land cover/use which has caused major problems like agricultural lands loss, water pollution, soil erosion and some social and economic disadvantages [8]. Some of these undesirable consequences have been caused by the prevalence of buildings incompatible with the warm and dry climate of these cities and damaging ecological resources -like damaging agriculturally rich lands by expanding them immethodically. One of the main factors of sustainable development is conservation and equipping of natural resources [9]. K. Yazdi, Ardestan Branch, Islamic Azad University, Ardestan, Iran. Tel: +03625242047. 1523 World Appl. Sci. J., 19 (10): 1523-1531, 2012 In sustainable architecture there are objects such as CO2 and CFC emission reduction, of course with regard to increasing energy consumption trend in all over the world [10]. In sustainable architecture in the past, the locations of the rooms and buildings were totally dependent on and in harmony with the solar energy [11]. Colors, piers’ thickness, the positions of outlets, colors of the windows and sheds were all compatible with climatic solutions. Although production activities such as greenhouse production also should be compatible with climate properties in these areas [12]. Major construction materials used in Iranian old buildings were recyclable, regional and very durable. The wind was used for conditioning and cooling the internal space in a passive and useful system in wind towers for the purpose of stability. The basement and cellars, along with wind towers, created a traditional pleasant air-conditioning system which is an innovative instance of the relationship between ancient architecture and the concept of stability. Providing climatic comfort and economy in consuming the energy is practiced through reducing surfaces exposed to the sun in the buildings and urban structures and also b creating density [13]. Urban dense structure is mostly surrounded by a green belt of fruit gardens and farming lands acting as an ecological policy. The green area around a city plays an important role in preserving central constructions against desert winds, dust and dry weather [14]; it is also considered one of the key factors in the cities’ natural air-conditioning system. The location of penthouses –the outstanding feature of desert architecture- would place the pedestrian’s paths in the shadow in a proper sequence. In many penthouses, entrances for several houses are joined, which is significant in terms of neighborhood relationships. Surrounded houses, hierarchy and respecting social boundaries and places would be practiced through this kind of architecture and the whole process has resulted in social stability of desert cities. It is necessary to investigate and evaluate various aspect of architecture in arid zones cities. However, Evaluation is the systematic determination of the quality or value of something [15]. The importance of evaluation as an aid to achieving sustainability through measuring, benchmarking and comparing cannot be overstated [16]. Architecture offers use-values that are necessarily for fulfilling wide-ranging human needs from basic shelter to dignity and self-affirmation [17, 18]. Ideals and Models “World-in-a-pot” model “Peach B lossom Spring” model Traditional Chinese Landscape Architecture Underlying Philosophy Unity of Man with Nature Yin-Yang theory G uiding Principles Five-Element theory Eight-trigram theory Feng-Shui theory Fig. 1: Philosophical and cultural foundations of the Chinese landscape architecture Yard is the main central area in desert houses. Low yards and water ponds in the middle of the yard make it possible for every house to enjoy maximum cool and pleasant weather [19]. Ancient Iranian architecture in deserts has been formed in accordance with the climate and developed into the desired sustainable style by taking advantage of useful natural resources such as the wind and sunlight. Sustainable development is a type of development which considers people’s present needs along with the feasibility for the next generation to satisfy its needs [20]. In some countries such as China ‘‘unity of man with nature’’ philosophy is dominant idea in ancient buildings architecture. The ideals and practices of Chinese landscape architecture (Fig. 1) have been profoundly influenced by ancient Chinese philosophies and cultural traditions [21, 22]. The unifying theme of ancient Chinese philosophies and cultural traditions is ‘‘unity of man with nature’’ or ‘‘harmony between man and nature’’ [23]. The present study is based on field work and library research, conducted by sampling in Ardestan city with 3776 houses, 957 business centers and 201 miscellaneous units. Questionnaires were prepared for measuring the amount of the stability of the area’s constructions and the data were collected and categorized. MATERIALS AND METHODS Goals of Sustainable Architecture: According to the International Environmental Commission Statement, major goals of sustainable development may be summarized as follows: 1524 World Appl. Sci. J., 19 (10): 1523-1531, 2012 hazard-resilient communities. Firstly, human and natural systems are not only interconnected; they are coupled, with human systems enmeshed with natural systems. The economy is a subsystem of socio-political and cultural systems that together are embedded in the earth’s ecological systems. People are not separate from nature: humans and natural systems are an intertwined and integrated system—one complex system of systems with recursive coupling between the inter-linked human and natural elements [36]. Environmental Sustainability Ecosystem integrity Carrying capacity B iodiversity Social Sustainability Cultural Identity Empowerment Accessibility Stability Equity Economic Sustainability G rowth Development Productivity Trickle-down Human Well Being Principles of Sustainable Designing: The principles include: 1. Harmony with the climate, 2. Sustainable materials, 3. the proper position of building for taking maximum advantage of recyclable energies, 4. Sustainable capacity and shape of the building, 5. Local construction techniques, 6. economizingg the use of resources, 7. Noticeable presence of the nature, yet no intruding upon it. The term “sustainable architecture”, used to describe the movement associated with environmentally conscious architectural design, has created ambivalence and confusion [37, 38]. Fig. 2: Relationship between sustainable factors Vulnerability Context Huma SOURCE FUNCTIO N Natural Resources Ecosystem Service Social Political Physical Financial Natural Cap ita l SINK FUNCTIO N G overnance Institutions Livelihood Strategies Livelihood Outcomes Fig. 3: Sustainable Socio-ecological Systems[35 Revising and modifying the improvement quality Saving the budget by cutting living expenses Food, energy and water Sanitary facilities Providing stability level by population Maintaining and increasing the resources Combining the environment and economy in decision making International economic relations [24]. In Short, Well-Conceived: Participatory planning processes enable communities to interrogate and transform prevailing unsustainable practices that undermine socio-ecological resilience [25]. The conceptual framework portrayed in Fig. 3 provides a guide to thinking and practice for such planning processes. It portrays interacting elements of coupled socio-ecological systems, drawing on insights from ecological economics [26, 27], resilience studies [28-31] and sustainable livelihoods [32-34]. This framework highlights three features that are central to understanding the nature of sustainable, Geographical Location of the Area under Study: For conducting the present study, a large area had to be investigated. The area under study is located in northeastern part of Esfahan and it includes important population centers such as Ardestan city. Ardestan city is the center of Ardestan district, with 55°-22' eastern longitude and 33°-23' northern latitude. Being an urban center in Esfahan, Ardestan is one of the least populated districts. The city has existed –based on evidencesbefore Islam. Historical places attributed to Sassanid era (Mianshahr Castle and Sassanid ruins) prove the city’s ancient history. The strategic situation of this area, along with its environmental advantages (concerning water, soil and weather) were but a few reasons for establishing a city at that time in the past. RESULT AND DISCUSSION Urban Structure and Planning, Identifying the Borders of Different Neighborhoods in the City and their Interactions: Ardestan is city in the hot and dry climate near Iran’s central desert; therefore -like in other areas in such a climate –water is a necessary need for the existence of the city. Traditional structure and the formation of the city are also dependent on water to a large extent. Based on conducted bulk of research, 1525 World Appl. Sci. J., 19 (10): 1523-1531, 2012 Fig. 4: The City’s Spatial Organization (small to large level) Table 1: Evaluating Buildings’ Values Total Buildings Residential Type of Building in the City Buildings Precious 77 58 Old 68.11 13.12 In the need for repair 89.11 64.21 there are a number of subterranean canals in Ardestan city, any of which could have been the reason for establishing residences and neighborhoods around them. In fact, water was the factor shaping the old structure of the city on a small scale and joining different neighborhoods on a larger scale. These neighborhoods, gardens and their surrounding farms were extended through the time; now joined together, these lands form the old structure of the city. However, later road layouts separated these units and the streets scattered the old structure. The old structure of the city is organic and has narrow alleys to match the climate and protect people against the heat. Another significant point is the relationship between directions of alleys and paths and that of water movement and issues related to gardens’ and farms’ irrigation. In the new neighborhoods, the new towns are separated, yet connected with roads; therefore, people commute only to receive services unavailable in their own towns and they usually go to the city center for other necessities. The Logic behind the Architectural Shape and Urban Structure Concerning Climatic Issues: Through investigating the architecture and urban and rural structures of cities and villages in hot and dry climates –including the case under study- it is found out that climate is an important factor in logical formation of urban structures and their type of architecture [39]. Moreover, climate-related issues have always made serious problems for the people living in these regions [40]. Through the time, these problems have led people towards solutions which astonishingly decrease disturbing climatic aspects and take advantage of climatic relaxing aspects [41]. In fact, architecture is an art which cannot be separated from its surrounding conditions and features (natural or otherwise), because any region has its own characteristics and it needs exclusive reactions [42]. Since humans and their needs are at the centre of sustainable development (The Rio Declaration in UN Agenda 21 preamble), buildings are arguably a vital component of sustainability [16]. Seen as a spatial-temporal system through a lifecycle analysis approach, a building is comprised of products and processes starting from raw-material extraction and preparation, through building material manufacture to building construction, use and maintenance, final demolition and disposal/recycling (with inputs of labour, transport and machinery) [43]. The activities leading up 1526 World Appl. Sci. J., 19 (10): 1523-1531, 2012 wind & sun direction summer-humid moderate torrid summer-dry moderate winter torrid moderate cold Crossover collinear against Fig. 5: Locating outer spaces based on minor climates Fig. 6: The percentage of the buildings’ age in relation to other buildings in the city to construction, as executed for one building, have micro-scale effects on the natural and socio-economic environment. Cumulatively, the micro-scale effects constitute a macro-scale. Study of buildings in sustainability science is imperative because the overall impact of buildings on environmental and socioeconomic systems is immense [e.g. 44-47]. By thinking and knowing the surrounding environment, Iranian traditional designers created exclusive buildings whose beauty was considered as well as their usefulness and sustainable functions when facing unfavorable environmental conditions. These issues were so important in Iranian ancient architecture that locating a city, positioning the buildings concerning the sunlight direction and major winds, the direction of the city extension, the directions and forms of paths, the locations of squares (for passing the air through passages, markets and houses) were all chosen very carefully and in relation to the region’s climate. Fig. 7: Urban structure stability in several situation Fig. 8: The amount of the presence of the region’s climatic architecture principles in the existing buildings in the city 1527 World Appl. Sci. J., 19 (10): 1523-1531, 2012 Table 2: Taking into account the characteristics of urban sustainability in buildings (depending on wind and plant and water works) No. 1 2 3 4 5 Characteristics of sustainable architecture and urban planning Using water ponds and waterscapes Using trees to cast shadows Using plants adapted to the climate Using artificial cooling systems (wind towers, chaharsoffeh -i.e. a cross-shaped room with more than one roof-, etc.) Planting dense plants near the rooms Percentage of observing principles in the buildings between 0-10 years old Percentage of observing principles in the buildings between 10-30 years old Percentage of observing principles in the buildings more than 30 years old 7.45 5.37 3.20 - 15.63 21.15 17.17 1.71 46.25 57.41 59.38 32.26 15.2 37.51 62.12 Table 3: Taking into account the characteristics of urban sustainability in buildings (due to the inherent properties of materials) Characteristics of sustainable No. architecture and urban planning Percentage of observing principles in the buildings between 0-10 years old Percentage of observing principles in the buildings between 10-30 years old Percentage of observing principles in the buildings more than 30 years old 1 2 3 1.12 42.31 27.41 47.13 76.12 43.15 82.41 97.34 85.9 Using high heat-capacity materials (mud-bricks and mud) Materials in light colors (cob, etc.) Using local materials Table 4: Taking into account the characteristics of urban sustainability in buildings (according to the order form No. 1 2 3 4 Characteristics of sustainable architecture and urban planning Designing different parts of buildings considering the direction of the sun Designing different parts of buildings considering the major winds Condensed mass and square, long plans in east-west houses Condensed mass and rectangular, long plans in south-north or high buildings Percentage of observing principles in the buildings between 0-10 years old Percentage of observing principles in the buildings between 10-30 years old Percentage of observing principles in the buildings more than 30 years old - 7.3 35.41 - 4.2 17.42 5.91 17.82 32.14 27.15 32.8 27.21 Table 5: Taking into account the characteristics of urban sustainability in buildings (with shadows) Characteristics of sustainable No. architecture and urban planning Percentage of observing Percentage of observing Percentage of observing principles in the buildings principles in the buildings principles in the buildings between 0-10 years old between 10-30 years old more than 30 years old 1 2 3 4 5 6 7 8 4.1 8.6 7.1 4.21 5.7 0.28 Building rough and uneven surfaces facing the sun Dome-shaped or cylindrical shaped roofs Designing proper details for the doors and windows (light-blocks) Designing windows on top of the walls (blocking radiant sun rays) Being inner-directed and walled around Reducing outer surfaces to the least possible Reducing contact with the heat and intense sunlight Tall parapets on the roofs 12.32 14.71 10.1 7.21 24.9 17.63 25.7 7.1 32.17 43.11 35.27 42.35 58.7 48.13 51.8 24.25 Table 6: Taking into account the characteristics of urban sustainability in buildings (with thermal insulation) Characteristics of sustainable No. architecture and urban planning Percentage of observing principles in the buildings between 0-10 years old Percentage of observing principles in the buildings between 10-30 years old Percentage of observing principles in the buildings more than 30 years old 1 - 1.20 8.72 5.3 12.1 0.32 22.14 27.14 5.41 67.13 37.51 - 0.67 24.1 2 3 4 5 Using soil’s high heat-capacity (building structures under the ground) Using cellars and basements Thick walls and roofs (heat insulation) Using entrances to enter an area (blocking the direct connection with the environment) Using suspended ceilings (two-layer roofs and domes) 1528 World Appl. Sci. J., 19 (10): 1523-1531, 2012 ACKNOWLEDGEMENTS In addition to exclusive and valuable buildings in the city, historical structures, passages, paths and the neighborhood organization are of high value and beauty, as well as adapting to the special climate. The most important historical site is the area of Ardestan’s main mosque, including a mosque, Husseinieh, bath and the main mosque. The researchers would like to appreciate the research vice-presidency in Islamic Azad University, Ardestan Branch for their support and coordination to fulfill the research plan of “Research about construction Patterns from sustainable architecture view in Ardestan” and the present study. CONCLUSON REFERENCES Sustainable architecture in Ardestan has been a strategy for improving the life quality and comfort. A sustainable architecture may be achieved by observing Ardestan’s architecture. 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