Climatology
Mehdi pourahmad; mostafa karampour; behroz nasiri
Abstract
The aim of this study was to reveal the relationship between land cover changes and changes in aerosol optical depth index in the Middle Zagros. In this regard, two categories of MODIS sensor remote sensing products were used. First, land cover changes in the study area were performed using MODIS sensor ...
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The aim of this study was to reveal the relationship between land cover changes and changes in aerosol optical depth index in the Middle Zagros. In this regard, two categories of MODIS sensor remote sensing products were used. First, land cover changes in the study area were performed using MODIS sensor land use classification derivative product. In the second part of the research, the trends of dust events were investigated based on the station data of the dust codes of 4 stations of Khorramabad, Shahrekord, Yasuj and Abadeh. In addition, the trend of Aerosol Optical Depth Index (AOD) was examined using MOD04-L2 Madis sensor product for the statistical period 2000 to 2020. The results showed that there were 6 layers of rangeland, forest, agricultural, urban, residential, barren and water areas in the Central Zagros, in which the forest floor has decreased by about 123 square kilometers per year. Rangeland cover, which is the main cover of the study area, has remained relatively stable, and agricultural land uses have increased significantly, from 7% in 2000 to 9.5% in 2020. Urban and residential lands had also increased. On the other hand, a review of the 21-year time series trend of the AOD index indicates an upward trend over the last 21 years. Among the land use classes, the two categories of pastures and forests, which in fact occupy more than 90% of the study area, have shown an inverse relationship with the AOD index. But the class of agricultural lands was directly related to the AOD index. Therefore, the decreasing trend of forest floor in the region has been significantly associated with the increasing trend of AOD in the region and on the other hand, the increasing trend of agricultural land has been associated with the increase of AOD in the region.
Climatology
mehdi asadi; Ali mohammad khorshiddoust; Hassan Haji Mohamadi
Abstract
Introduction
Data and information from the Meteorological Department of India and the Joint Hurricane Warning Center (JHWC) were used to investigate the structural nature of Ashuba tropical storm in the Arabian Sea from June 7 to June 12, 2015. To study the atmospheric structure, the analyzed digital ...
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Introduction
Data and information from the Meteorological Department of India and the Joint Hurricane Warning Center (JHWC) were used to investigate the structural nature of Ashuba tropical storm in the Arabian Sea from June 7 to June 12, 2015. To study the atmospheric structure, the analyzed digital data were taken from the European Center for Medium-Term Forecasts and the Center for Environmental/Atmospheric Forecasts (NCEP/NCAR) for the Arabian Sea and beyond. The study area was the Arabian Sea, located between the Indian subcontinent (eastern part) and the Arabian Peninsula (western part) and northwest of the Indian Ocean. On average, 1-2 tropical cyclones form on the Arabian Sea each year. Even in some tropical regions, strong cyclonic cycles occur at the synoptic scale (Evan & Camargo, 2001: 145). Therefore, from previous years, climatologists have studied the types of storms, due to the increase in tropical cyclones in the last decade; and thereby, this issue is followed with more sensitivity. Consequently, the main purpose of this study was to explore the structural nature of Ashuba tropical storm on the Arabian Sea in order to identify one of the region's main moisture sources.
Materials and Methods
Storm data statistics were obtained from the Meteorological Department of India and the Hawaii Hurricane Warning Center. Analyzed digital data, including; Geopotential altitude (Hgt), orbital (u), meridional wind (v), sea surface pressure (SLP), air temperature and sea water temperature (SST) for standard levels at 17 compression levels with a resolution of average daily geographic degree belonged to the National Center for Environmental Prediction/Atmospheric Science and precipitated networked data were obtained from the European Center for Medium-Term Atmospheric Forecasting (ECMWF) with a resolution of 0.125 degrees Celsius for the Arabian Sea. NASA and MODIS satellite imagery were also used for the visible band for every six days. The CAPE index was applied to evaluate the energy required by the storm supplier.
Findings and Discussion
The results of study displayed that in the middle level of the atmosphere, while forming a low-altitude nucleus with very strong positive rotation, the conditions for the production of tropical storms in the region have been provided. On the other hand, on the surface, low pressure has formed in the southeast of the Arabian Sea with a central pressure of 995 hPa and has started moving westwards towards the coasts of Oman and northern Yemen. Creating a very strong convergence current on the surface and upper divergence caused the storm to reach its maximum strength in the region on June 9. However, the anomalous temperature of the water surface in the range where the storm reached its maximum intensity reaches to over than 5 degrees Celsius. The increase in water surface temperature and the transfer of heat and moisture into the storm has strengthened and, by its nature, caused heavy rainfall in the region. Finally, on June 12, as it approached the east coast of Oman, it began to disappear due to lack of moisture for its dynamic movements, and changed from a tropical storm to a tropical hurricane. Also examining the prepared maps for the amount of precipitation and the flow of the lower levels of the atmosphere, it was determined that on the first day of the storm, a cyclonic current occurred in the east of the Arabian Sea, resulting in the maximum amount of precipitation in the west of the system, which reaches more than 240 mm. On the second day, moving north of the system, the amount of precipitation was concentrated in the south, so that the southern coast of India was not unaffected by precipitation and had about 120 mm of rainfall. On the third day, with the placement of this tropical storm in the north of the Arabian Sea, the maximum precipitation was created in the east of the system, which was more than 160 mm. On the fourth day, the western half of the Indian coast was faced with a rainfall of nearly 110 mm, which was due to its location in the east of the cyclone, which in turn caused the rise of air and the transfer of moisture to the air parcel, floods in the region. On the fifth day, the maximum rainfall was close to the eye of the storm, which was close to 100 mm, and the coastal areas of the Indian subcontinent were still experiencing heavy rainfall. Examination of the 850 hPa pressure system revealed that on the first day, the maximum relative pressure system nucleus formed in the southeastern parts of the Arabian Sea. These conditions have led to very strong convergence in the lower levels. The presence of such strong convergence and amplification of rotation has caused this anomaly to reach its maximum in the region. The strong rotating nucleus then extended to the west coast of India and then moved westward on the third day to the central regions of the Arabian Sea, with a very strong rotating current extending from latitudes 10 to 30 degrees north. As the storm/hurricane approached the west coast of the Arabian Sea, it intensified to more than five pressure system units on the fourth day. On the fifth day, the positive nucleus became independent and formed a very strong rotating closed cell. On the sixth day, with the cyclone remaining on the eastern coast of the Arabian Peninsula, its power had gradually diminished.
Considering the water temperature in the region, which is an average of 6 days, it showed that the water temperature in most parts of the Arabian Sea was high, so that these conditions reached more than 32 degrees Celsius in the coasts of India and the center of the Arabian Sea. These conditions were less only in the northern regions of the sea than in other regions. To understand the water surface temperature, its anomaly was also calculated for six days with the storm. Its output indicated that the eastern, northern, western and southwestern regions of the Arabian Sea were associated with a positive anomaly of 2 to 3° C. Negative anomalies only reached -1.5 degrees Celsius in the north and south of the sea. Occurrence of maximum positive anomalies in the region was one of the main reasons for the intensification of cyclones in the region, so that the western regions of the Arabian Sea had the maximum positive anomalies and on the other hand the maximum area of tropical cyclone activity.
The 12-hour reports from the Indian Meteorological Agency and the Hawaii Hurricane Warning Center were used to route the tropical storm. In these two centers, there were several data methods for routing and the origin of the storm. Geographical coordinate data with a 12-hour separation was used, which from the beginning of the storm to its decline, its characteristics and longitude and latitude were recorded as a text file. The onset of the storm was from the eastern part of the Arabian Sea, which migrated northward to higher elevations and deviated in its path due to the dominance of the Coriolis to the west of the region and disappeared off the coast of Oman.
Conclusion
Ashuba tropical storm/hurricane formed on June 7, 2015 in the Arabian Sea and disappeared on June 12, 2015. This investigation revealed that on the first day, a low-lying cell was formed in the eastern part of the Arabian Sea, during which a positive rotating nucleus or vortex was formed in the mentioned area and strengthened in the following days. The role of the Arabian Sea and abnormal changes in its water surface temperature in the occurrence of hurricanes has been mentioned in the researches of Ghavidel Rahimi (2015: 31) and Lashkari and Kaykhosravi (2010: 19). On June 9, as the subtropical anticyclone expanded further east, the Arabian Sea's low-pressure cell became oval in a circle, contributing to the deepening of the system, creating another bond at the heart of the closed cell with a height of 5,810 geopotential meters. In the last days, as the coasts of Oman and Yemen approach, the intensity of this cell decreases and its extinction stage was reached. On the surface, in parallel with the mentioned period, a low-pressure core with a central pressure of 995 hPa formed on the southeast of the Arabian Sea and the creation of a very strong positive rotation indicates the occurrence of hurricanes in the region. The central pressure of the storm reached less than 993 hPa on days 9 and 10, which was the peak of the storm. As it approached the shores, the intensity of this cyclone was greatly reduced, turning it from a tropical storm into a tropical turbulence. Examination of the water surface temperature showed that the average water surface temperature in these 6 days in most parts of the Arabian Sea was more than 29 degrees Celsius. Inspection of water surface temperature anomalies also disclosed that the maximum positive anomalies corresponded to several places in the sea, including the southern coasts of Pakistan to western India, eastern Oman and a very strong core corresponding to the southwest of the Arabian Sea with an average temperature of more than 5° C. The maximum rainfall inside the cyclone indicated that on the first day of the storm, the maximum rainfall in the southwest was 240 mm. In the following days, with the transfer of this core to the south, southeast and finally to the east, the maximum rainfall would be on the west side of the Indian coast. Only in the last days it was observed that while the maximum rainfall occured in India near the eastern part of the eye of the storm, a maximum precipitation center with an average of 100 mm has been created. In this study, two indicators, CAPE and SWEAT, were used to assess the location of storm formation. The results showed that these two indicators well showed the formation and severity and weakness of the storm during different stages. Thus, on the first day in the south of the Arabian Sea, the amount of CAPE was more than 5000 Jules/kg, which indicates the amount of convective energy available. On the other hand, the values of the SWEAT index have reached more than 380, which specify that the probability of a hurricane in this region is very high. Also, with the increase of water surface temperature in the region and the increase of anomalies in it, the necessary energy is provided for the production of cyclones in the region, which with the increase of energy within the air mass system and the presence of buoyancy energy in it, and on the other hand, instability indicators in monitoring and tracking these types of storms showed that they are a suitable tool for tracking and are able to navigate it while being aware of the intensity of the storm.
Mehri Akbari; Hossein Mohammadi; Ali akbar Shamsipour
Volume 18, Issue 48 , June 2014, , Pages 17-36
Abstract
Abstract In this research large scale dynamic and thermodynamic anomalies during storm events resulted from cyclogenesis in the Mediterranean Sea and Sudan low-pressure systems, are investigated. 5 severe storms that happened in KarunBasin (1998-2008) were selected and using Japanese Re-analysis data ...
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Abstract In this research large scale dynamic and thermodynamic anomalies during storm events resulted from cyclogenesis in the Mediterranean Sea and Sudan low-pressure systems, are investigated. 5 severe storms that happened in KarunBasin (1998-2008) were selected and using Japanese Re-analysis data (JRA25), anomalies of dynamic and thermodynamic indices, 2 days prior to the start of the storm until the end of the storm were analyzed. The selected indices in this research are potential vorticity, convergence and divergence, vertical velocity, absolute vorticity advection, specific humidity, moisture flux, potential temperature and equivalent potential temperature. According to the results and comparing 6-hourly recorded rainfall amounts, it was found out that in the reference events, before the start of the storm, geopotential height values, in the under-study region decreased and at the time of maximum rainfalls, the geopotential height reached to its lowest values and by end of the storm, the values started increasing, whereas parameters related to convergence and vertical movements, such as potential vorticity, vorticity advection, moisture flux, convergence of moisture and specific humidity amounts corresponded to the same trend of rainfall from the beginning to the end. It is obvious that none of these indices can individually cause the occurrence of a storm, but by analyzing trends and regressions, it seems that there are meaningful relationships between geopotential height, moisture advection and potential vorticity and rainfall amounts which can be used in forecasting future rainfall events. To verify the results obtained from the reference events, 2 days without rainfall at least 2 days before and after the selected days, were also selected and studied. The results verify considerable changes of the selected dynamic and thermodynamic indices during stormy days compared to the days without any rainfall in the region.
Rural Planning
habib aghajani; saeedeh cheshmaloos
Abstract
Introduction Poverty means the inability to meet one's basic needs and necessities of life such as food, clothing, housing, etc. The concept of basic needs varies based on time and place, and it includes the minimum needs to survive with an average standard of living. Poverty limits human development ...
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Introduction Poverty means the inability to meet one's basic needs and necessities of life such as food, clothing, housing, etc. The concept of basic needs varies based on time and place, and it includes the minimum needs to survive with an average standard of living. Poverty limits human development and has long-term and extensive harmful consequences (Arzerum Chiller, 2005). The poverty phenomenon has long accompanied mankind and has been one of the basic socio-economic issues of humans. In recent decades, despite the expansion of the implementation of economic reform, poverty and inequality are still seen in most countries. Also, due to their comprehensive consequences, poverty and inequality are nowadays the focus of international organizations, government officials, economists, and of course sociologists more than ever. The significance of poverty reduction has always been focused on in religious teachings. Besides, elimination of poverty and deprivation of members of society and ensuring their well-being has strong theoretical foundations in the Holy Quran and Islamic teachings. Therefore, reducing poverty and respecting human dignity must be operationally considered in economic and social plans (Hekmati Farid, 2013). Given these teachings and the importance of poverty reduction in the country's development, paying attention to the poor and supporting them can be seen in Articles 2, 3, 21, and 29 of the Constitution, as well as Article 43, which pays particular attention to erase poverty and deprivation from society. Data and methodology The general econometric model used for examining the impact of variables and factors affecting the rural poverty index with a focus on rural roads is described as follows: i=1,2,…,28 t=1,2,…,15 Where the variables are: Sen = Amartya Sen poverty index (rural); calculation of the Sen index for rural areas of Iranian provinces RAH = Existing rural road (km) of the Roads and Transportation Organization El = Number of villages receiving electricity recorded by the Statistics Center of Iran He = Number of rural health centers recorded by the Statistics Center of Iran Educ = literacy rate of the rural population AB = Number of villages with drinking water recorded by the Statistics Center of Iran In = average rural household income khc = Food expenditure of rural households AGG = Agricultural sector growth rate It must be mentioned that the model was estimated in two modes to examine the short-term and long-term effects of rural road development on the rural poverty index. Mode one occurs with the Rah and DRah variables, which represented the total number of the rural roads in the province in each year and the difference of rural roads in the province in each year, respectively. Mode one showed whether or not the development of rural roads each year has affected poverty. Also, the model was estimated in different modes with different variables to avoid the collinearity problem. This model was designed based on panel data and its coefficients were estimated using conventional panel data econometric methods. Analysis of findings and conclusion As mentioned earlier, in addition to the transportation of agricultural products, roads reduce the time of transportation and the final price of the produced goods. Safe and proper roads and transportation networks are essential for accessing other important centers of the country. Besides, according to many experts, the effect of this factor on the expansion of other developmental factors is undeniable and it paves the way for significant development in various ways. Providing physical infrastructures plays an important role in the economic development process and facilitates accessing infrastructures such as education and health facilities, water supply, supply of electricity, and transportation, which in turn enhances welfare. Because it seems that the development of infrastructures such as investments in healthcare services, electricity and water supply, development of irrigation and drainage networks, construction of rural roads, and establishment of educational centers in rural areas improve income distribution and decrease the poverty rate. According to the statistics of the National Roads and Transportation Organization, the length of rural roads (asphalt and dirt) was 100316 km in 2005, and it was increased to 128139 in 2016. Evidence obtained from comparing rural road expansion and poverty reduction showed that the development of rural roads can have a positive impact on poverty reduction. Based on the research findings, it could be concluded that the expansion of rural roads affected rural poverty. Results and Discussion According to the results of estimations, the expansion of rural roads could not influence poverty in short term, but it could have a diverse influence on poverty, in the long run, meaning that it could reduce poverty. The negative value of the constructed rural road coefficient indicated the negative effect of this variable on the Sen poverty index. In other words, an increase in the constructed rural road led to a reduction in rural poverty. The coefficient associated with the average rural income had a negative value and significance, which indicated that the increase in the income of rural households throughout the studied years reduced rural poverty. The coefficient related to investments in water resources had a negative value and was insignificant, which indicated that this type of investment did not have a direct effect on poverty reduction. The coefficient associated with the variable of the number of villages supplied with electricity was significant and had a negative value, which was an indication of the inverse effect of this variable on poverty. The coefficient of the effect of agricultural sector growth rate on rural poverty was insignificant, which was indicative of the direct effect of this variable on poverty.
Saeed Jahanbakhsh; Majid Zahedi; Khalil Valizadeh Kamran
Volume 16, Issue 38 , February 2012, , Pages 19-42
Abstract
In a wide variety of scientific climatology studies earth surface temperature, is important, Astronomy, meteorology hydrology, ecology, geology, medical science, design and optimization of transportation network and site selection of fire extinction and particularly cases required. In the calculation ...
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In a wide variety of scientific climatology studies earth surface temperature, is important, Astronomy, meteorology hydrology, ecology, geology, medical science, design and optimization of transportation network and site selection of fire extinction and particularly cases required. In the calculation of the actual evapotranspiration also we consider these.. Considering the earth's surface temperature monitoring in a limited number of meteorological stations to the distribution point and the need to place the surface temperature in a wide area and at the same time the surface temperature were estimated. To access the earth's surface temperature and classification SEBAL algorithm and decision tree were used. Using ETM + image dated 31 August 2000 and pre- process, files became ready for implementation. For processing of SEBAL method. the above mentioned software Envi4.5 and ArcGIS9.3 were used. This paper estimates the difference less than 5.57° C, temperature difference between a satisfactory level was estimated through remote sensing and statistics. Temperature measured from ground level 12 years (1993 - 2005) in Maragheh meteorological station was achieved. Temperature was estimated through remote sensing and studies applicable in earth sciences research and the environment.
Hamed Beyti; siyamand Panahi; Maryam Salimi
Volume 18, Issue 49 , November 2014, , Pages 19-53
Abstract
Today the phenomenon of the urbanization has made the most complicated issues and challenges in the urban affairs and the urban transportation is one of the most essential problems in the process of the urban planning issues in this regard. Hence, the construction of the most suitable infrastructures ...
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Today the phenomenon of the urbanization has made the most complicated issues and challenges in the urban affairs and the urban transportation is one of the most essential problems in the process of the urban planning issues in this regard. Hence, the construction of the most suitable infrastructures regarding to the transportation affairs and praising the whole citizens to apply the same public transportation systems such as the buses, Metro can be considered as the main fundamental challenges of the urban managers in this pavement. Among this, the system of the bus rapid transportation is considered as one of the most effective approaches in the field of the public transportation efficiently. This makes also the high potential benefits being used in many various cities of Iran. Since the application of this kind of the transportation system needs special equipments, it will affect on the neighborhood affairs directly or indirectly economically and socially. The main purpose of the study is to investigate the impacts of the BRT transportation systems on the residential and commercial contexts in Tabriz Mega-city.
Based on this, the impacts of the BRT path has been specified by the application of many various library and field-based studies and then the research questions have been responded by the use of the field-based studies and the descriptive and inferential analysis. The analysis of the gathered questionnaires from the impact of the BRT system shows that the reaction of challenging fields along with the residential and commercial units are completely different towards the implementation of this plan while it has been attracted the satisfaction of the residents and commercial units relatively in relation to the implementation of the related plan potentially.
Geomorphology
Ebrahim Asgari Kalajahi; Fatemeh Namakchi; Abdolreza Vaezi Hir
Volume 20, Issue 56 , August 2016, , Pages 19-38
Abstract
Landslide is one of the natural hazards which affects mountainous areas and destroys residential areas, farms and basic facilities each year. In addition to the damages caused by landslides on roads in towns and villages, the natural environments are also affected by soil erosion. The study area with ...
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Landslide is one of the natural hazards which affects mountainous areas and destroys residential areas, farms and basic facilities each year. In addition to the damages caused by landslides on roads in towns and villages, the natural environments are also affected by soil erosion. The study area with an area of about 80,000ha is located in the west of Khoy city, northwest of Iran. Some landslides have occurred on the southern slopes which verge on the roads and frequently damage the main road, Iran-Turkey railway and several villages, such as Gougerd and upper Kalt village. Due to the proximity of the study area to the main roads and residential areas and the existence of several historical mass slides, evaluation of landslide hazard and preparing a risk map is necessary. In this research, the potential landslide zoning map was developed by evaluation of each parameter influencing landslide including lithology, slope geometry, geological structures, relative elevation, land use and coverage and ground-water. Final zoning map was produced through overlaying of the maps developed by scoring of the mentioned parameters. The study area was divided in to 5 zones from potential landslide view of point, including safe, low, medium, risk and very high risk zones. About 23 and 5.6 percent of the total area are subjected to high risk and very high risk landslide hazards, respectively.
Rural Planning
Manije Ahmadi
Abstract
Now a day, environmental crisis resulting from uncontrolled human intervention has caused ideas on human interaction with the environment and also the concept of ethics and its importance in the preservation and optimal utilization of the environment considered by researchers. Due to this, the need of ...
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Now a day, environmental crisis resulting from uncontrolled human intervention has caused ideas on human interaction with the environment and also the concept of ethics and its importance in the preservation and optimal utilization of the environment considered by researchers. Due to this, the need of evaluation of the current human approaches towards nature regarding moral and ethical aspects will be emphasized. The existing study was conducted to analyze the effects of social capital in rural environmental ethics. Type of research is applied and its nature and method is Descriptive-Analysis. Data collection method is library and fieldwork (questionnaire) and data analysis was done by using descriptive (mean, standard deviation) and inferential statistics (chi-square and linear regression). Population of The study were, Chaypareh Bala villagers of Zanjan city: 15022 people inhabitants in 3584 households in the 1390 census. Analysis Unit is rural households who are living in the village, in order to plan internal consistency and reliability of indicators, Cronbach's alpha coefficient was 0.86. The results indicate, there is a statistically significant difference among independent variable social capital and dependent variable environmental ethics. Investigations of existing study show, based on social capital a significant difference obtained in rural environmental ethics and there is a direct relationship between them. So, we can say that with increase social capital, the environmental ethics increase too.
Geotourism
Banafsheh Farahani; jafar bahari; Shahla Bahari; Marjan Bazleh
Volume 22, Issue 64 , September 2018, , Pages 19-33
Abstract
Tourism today is one of the most important and effective economic issues and of the important factors of Outstanding communication, social and cultural in the worldwide is considered. In fact, the expansion of the economic, health, security and communication infrastructure in the twenty-first century ...
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Tourism today is one of the most important and effective economic issues and of the important factors of Outstanding communication, social and cultural in the worldwide is considered. In fact, the expansion of the economic, health, security and communication infrastructure in the twenty-first century has made tourism an inevitable reality in human life (Saghaei and Alizadeh, 2013: 2). Hence, tourism is one of the key industries in any society that can attract planners attention, Because it affects many sectors of society, including the economic, cultural and environmental sectors. On the other, The large volume of travel in recent years has made tourism one of the largest industries in the world (Kazemi et al, 2012: 48), So that the income of tourism and tourist With transportation of passengers in about 17 percent of total world exports make up. Given the growing importance of tourism in today's world and the competitiveness of the tourism market around the world, Tourist destinations are increasingly competing with each other to attract tourists. The expansion of the tourism industry in every part of the world requires special conditions and conditions such as climate, ancient artifacts, natural attractions, traditions, infrastructure, facilities and equipment (Pourahmad et al, 2013: 2). So each of the tourist destinations should try to increase their share of the industry and its revenues. On the other hand, On the other hand, Should be noted in today's competitive world, The first trip to a tourist destination It does not mean the success of tourism destination, It is also a repetition of the trip to the tourist destinations and the introduction and promotion of it for potential tourists, which can serve the purpose of tourism in the long run. Hence, loyalty to the destination of tourism and its influential factors play a significant role in their long-term success. Therefore, efforts should be Loyalty to the destination of tourism and the factors that create this loyalty are identified and strengthened. Given the importance of brand loyalty to tourism destinations, The present study aims to investigate the factors affecting the loyalty of tourists to the tourism destination of Tabriz. Emission reduction of carbon dioxide and its impact on global warming process is one of the most important results in the use of renewable energy sources. In urban areas, solar systems stationed on building roofs are the most appropriate utilization method of stable source of solar energy. Urban compactness is a major urban form parameter that affects the accessibility of solar renewable energy in the built environment, so it is essential that the effects of urban compactness on buildings utilization of solar energy, be surveyed. The aim of this study is the evaluation of solar energy potential in urban areas and determination of the relation between urban compactness indicators and solar energy potential in the local scale. In this study, the annual solar radiation modeling for each of the building surfaces of the study area, over one year period, was performed using the Solar Analyst model. On the other hand, the relation between various compactness indicators including site coverage, plot ratio, volume-area ratio, Entropy, population density and building density with Annual solar radiation received by the study area was explored and using least squares regression model, the relationship between the solar radiation and urban compactness indicators was determined. Also potential of using two types of active solar systems including Building Integrated Photovoltaic Systems (PV) and Solar Thermal Collectors (STC) was evaluated. According to the results, the annual solar irradiation increase from 507 (in compression areas) to 741 (in scattered areas) Kilowatt hours per square meter. Volume-area ratio shows the highest determination coefficient, R2 equal to 0/805 with annual solar radiation. Also in the study area, the building roofs potential for the development of PV systems much more than STC systems, influenced by the degree of urban compactness.
Urban Planning
najma esmailpoor; Mitra Ghorbi
Volume 22, Issue 65 , November 2018, , Pages 19-44
Abstract
The rapid growth of Kerman in recent decades with modernism thinking has caused the formation of new and marginal neighborhoods, for many reasons old neighborhoods have been converted to inefficient fabrics that their quality is not suitable for citizens' life. New Urbanism has confirmed new approaches ...
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The rapid growth of Kerman in recent decades with modernism thinking has caused the formation of new and marginal neighborhoods, for many reasons old neighborhoods have been converted to inefficient fabrics that their quality is not suitable for citizens' life. New Urbanism has confirmed new approaches with compact, mixed-use, walkable, and relatively self-contained communities by relying on historic lessons from the most beautiful and successful cities. This study aims to determine the compatibility of New Urbanism principles in the traditional, middle and new fabric neighborhoods of Kerman to increase their quality of life. The present study is applicable, and it utilizes descriptive, comparative and surveying methods. Data collection is gathered from the desk and field studies. GIS analytical functions and statistical methods are used to determine the degree of compatibility. The studied indicators are divided into three categories of transportation, physical and historical, and in seven principles, then they are evaluated by the four-level spectrum. According to research results, the indicators show a significant difference in the use of new urbanism principles in various neighborhoods formed in different periods of Kerman development. Mozafari historical neighborhood (with Bazar) and the new one Hoshang-Moradi with the geometric meaning of 3.03 and 1.81, respectively, have the highest and the least adaptation with the new urbanism principles. Also, the highest and lowest compatibility in the studied neighborhoods is related to connectivity and housing diversity principles. New neighborhoods concerning physical principles; and old neighborhoods concerning historical and transportation principles are more compatible with new urbanism. Average of compatibility in Hoshang-Moradi neighborhood in physical principle is 3.56 and in Mozafari neighborhood in principles of historical and transportation is 3.67 and 4. Due to the relative compatibility of the neighborhoods with the new urbanism principles, its guidelines can be used to improve their quality of life.
Urban Planning
Rahimberdi Annamoradnejad; farzaneh Razeghi; Mahmood Arvin
Volume 23, Issue 69 , December 2019, , Pages 19-40
Abstract
Introduction: The most important public and creative spaces of the city are pedestrian or pedestrian highways that have the highest social role, with full pedestrian dominance, which can form an alley, a market, a market, a path to a square, a park, or the space of a complex, and Be a base for citizens ...
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Introduction: The most important public and creative spaces of the city are pedestrian or pedestrian highways that have the highest social role, with full pedestrian dominance, which can form an alley, a market, a market, a path to a square, a park, or the space of a complex, and Be a base for citizens to spend their leisure time. In the context of a spirit-based approach to the central context of the cities, the municipality of Rasht created a walkway in the center of the city. The walkway in the center of the city and its easy access to it has created the right atmosphere for citizens to interact and interact. The formation of such an environment requires the necessary indicators and criteria to attract citizens. Investigating the criteria and indicators affecting this environment and active participation of citizens in improving the quality of this environment and other similar environments is necessary. The purpose of this study was to evaluate the factors affecting the quality of Rasht cultural pedestrian space from the users' point of view.
Ali Reza Ildoromi; Hamid Zareabyaneh; Maryam Bayatvarkeshy
Volume 17, Issue 43 , October 2013, , Pages 21-40
Abstract
Rainfall due to its noise and random nature has structural changes at different times. Because of large uncertainty, fluctuations in the amount of rainfall forecast is created the prediction of which has been difficult. In this article, precipitation predictability was carried out rescaled by range analysis ...
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Rainfall due to its noise and random nature has structural changes at different times. Because of large uncertainty, fluctuations in the amount of rainfall forecast is created the prediction of which has been difficult. In this article, precipitation predictability was carried out rescaled by range analysis (R/S) technique in Shiraz, Mashhad and Kerman regions. SnapshotHurst (H) showed that rainfall parameter has the ability of predictability, because H was higher than 0.5 and much closer to the value 1. Minimum Hurst value was 0.8 in Mashhad and maximum Hurst value was 0.92 in Shiraz. In order to predict rainfall we used artificial neural network. Type of input parameters based on Pearson correlation test between data from non-rainfall, were a combination of temperature and humidity data. Number of input parameters, the number of middle layers, and other information related to artificial neural network randomly were selected. As a whole, rainfall estimation was calculated through Peresptron multi-layer neural network for comparing the performance of neural network. Results showed that the use of 3 and 4 meteorological parameters has the best rank estimator. Proposed layouts for the Shiraz station is 1-21-21-3, for Kerman 1-25-25-3 and for Mashhad 1-19-19-4 in which 1-25-25-3 of have correlation coefficients more than 91 percent. Validation rainfall models showed that network designed for rainfall parameters has best performance rainfall in Mashhad, Shiraz and Kerman stations with 4, 11 and 14 percent error respectively. As a whole, results showed that neural network method with considering the temperaturel and humidity data for describing the process and their combination in predicting good results were offered.
Kamal Omidvar; Mehdi Mahmodabadi; Farshad Safarpour
Volume 19, Issue 51 , April 2015, , Pages 21-39
Abstract
Abstract In this research we investigated synoptic pattern of heavy rain 1 and 2 February 2011 in southern and central regions of Iran specially Kerman province. At the first we calculated heavy rain for all of synoptic stations with use Extreme value type1 then thermodynamic characteristics of heavy ...
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Abstract In this research we investigated synoptic pattern of heavy rain 1 and 2 February 2011 in southern and central regions of Iran specially Kerman province. At the first we calculated heavy rain for all of synoptic stations with use Extreme value type1 then thermodynamic characteristics of heavy rain analyzed with use radio sounding and Skew-t data. For analyzing of this phenomenon we used daily rainfall data 32 synoptic stations of southern and central regions and SLP and 850, 500 and 300 hgt maps. In the 5 day periods, we investigated synoptic pattern formation and its trend in weather maps. The results show that main factor of precipitation in region is formation of cut off low on Mediterranean sea. This system act so blocking and with move onto east, it causes that trough of east Mediterranean reinforcement thus west systems penetrate to lower latitude and they get high level of humidity from south seas and they makes sever precipitations in the study area.
Urban Planning
saeid amanpour; nahid sajjadian; masoud modanloujouybari
Abstract
In a city the price of land and housing from one region to another, Based on the physical and socioeconomic different. The purpose of this study, Analysis of the spatial distribution of land prices And land on urban sustainability indicators is the efficient market. Research method Analytical- Descriptive ...
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In a city the price of land and housing from one region to another, Based on the physical and socioeconomic different. The purpose of this study, Analysis of the spatial distribution of land prices And land on urban sustainability indicators is the efficient market. Research method Analytical- Descriptive With the use of data collected through a survey needed to be discussed. The population studied an important loss in district 12 in Tehran. By using Cochran proportional to the population of each district representative was sample of 362 people. Land prices fell in the analysis and efficient market indices Gis in map software is used. review and evaluate the sustainability of neighborhoods of factor analysis and Morris models were used. Spss statistical analysis to examine the association between indicators of the land market efficiency and stability in the region is used. Factor analysis shows that in a physical-functional, Iran neighborhood as the most stable in the last place of an unstable neighborhood and the neighborhood martyr harandi behalf. The social factor also ranked first in terms of stability Darvazehshemiran neighborhood and neighborhood BAHARESTAN numerous volatile neighborhood. In terms of the local economy and local market ranked first in terms of stability bottom of the waterfall is unstable. The relationship between the earth and the efficient market indices Sustainable communities through Pearson correlation showed that A significant relationship between the level of 99% of the land market efficiency and sustainability are areas;فقاغفق
Rural Planning
ahmad hajarian
Abstract
In this research, using contextual analysis method, the contexts of rural home business development were identified. The information was collected based on semi-structured interviews and a study of sources and documents. Findings show that out of 126 open codes, 34 basic concepts were identified that ...
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In this research, using contextual analysis method, the contexts of rural home business development were identified. The information was collected based on semi-structured interviews and a study of sources and documents. Findings show that out of 126 open codes, 34 basic concepts were identified that can be divided into 11 categories of organizing themes. . These concepts are divided into 11 categories including: motivational, structural and infrastructural factors, marketing, policy-making, educational and extension, management, partnership, financial and credit resources, information system, attitude and support as organizing themes of the research subject. Were. The results of the analysis indicate that the participation of members, empowerment of stakeholders, change of attitude of villagers, improvement of credit and financial resources of villagers, improvement of infrastructure and comprehensive policy for the development of home-based businesses should be considered.Employment and unemployment, which are very important issues in rural areas, can be solved in general through home-based jobs and their development.
Mohammadreza Afshariazad; Haleh Poraki
Volume 16, Issue 42 , March 2013, , Pages 23-44
Abstract
Road transport plays a key role in the effective implementation of national sustainable development plays and safety of traffic during the year. Of special importance are Col Almass Anklet and Esalam in the western Alborz 30 km long road. This way of connects sections steep and passes high-risk areas ...
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Road transport plays a key role in the effective implementation of national sustainable development plays and safety of traffic during the year. Of special importance are Col Almass Anklet and Esalam in the western Alborz 30 km long road. This way of connects sections steep and passes high-risk areas and always threatens types of risks, especially in the range of movement types. Established lines of communication and identification of natural risks and geomorphic effects of road accidents caused by geomorphologic factors is a main issue The relationship between climatic phenomena, road accidents and the high-risk areas is studied which can provide suggestions and solutions to improve road transport safety factors. In one of the axes, the axis connecting the north of the country Esalem-Khalkhal (Col Almass) are included in the study. Methods are based on field observations and interpretation of these observations, geological and topographic maps, aerial photographs. In addition, a risk zoning map of the area showed geomorphologic 64 percent of association is high and very high risk. Geomorphologic assessment conducted in this study, shows damage to roads and other facilities in the area.
Hossein Babazadeh; Saeadamir Shamsniya; Fardin Bostani; Elnaz Norozyaghdam; Davood Khodadadydehkardy
Volume 16, Issue 41 , November 2012, , Pages 23-47
Abstract
Stochastic models have been used as one technique to generate scenarios of future climate change. Temperature and precipitation are among the main indicators in climate study. The purposes of this study is analysis of the status of climatic parameters of monthly precipitation and mean monthly temperature, ...
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Stochastic models have been used as one technique to generate scenarios of future climate change. Temperature and precipitation are among the main indicators in climate study. The purposes of this study is analysis of the status of climatic parameters of monthly precipitation and mean monthly temperature, years of drought and years of wetness due to precipitation deficiency, simulation and forecasting using stochastic methods. In this study, the 21 year data on the precipitation and mean monthly temperature at shiraz synoptic station are used and based on ARIMA model, the autocorrelation and partial autocorrelation methods, evaluation of all possible models regarding their invariability, examination of parameters and types of model, the suitable models for prediction of monthly precipitation: ARIMA (0 0 0)(2 1 0) 12 and for forecasting of the mean monthly temperature: ARIMA (2 1 0)(2 1 0) 12 were obtained. After validation and evaluation of the model, the forecasting for the agriculture years 2008-09 and 2009-10 were made. In view of the forecasting made, despite of a continuing drought, it is likely that the precipitation will improve. As regards the mean monthly temperature, the trend of increasing temperature, especially in recent years, has continued and the findings of the forecasting show an increase in temperature along with a narrowing of the range of variations.
firooz Jamali; Mirsatar Sadrmousavi; Mehdi Eshlaghi
Volume 18, Issue 47 , April 2014, , Pages 23-53
Abstract
The hospital is an important element of the new public health. The health of a population requires access to medical and hospital services as well as preventive care and a healthy environment. Site selection of urban public facilities is one of the most important goals of urban planning. Planners help ...
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The hospital is an important element of the new public health. The health of a population requires access to medical and hospital services as well as preventive care and a healthy environment. Site selection of urban public facilities is one of the most important goals of urban planning. Planners help increase the welfare of citizens by means of allocation of urban lands to various necessary urban land uses and facilities, by reducing unnecessary commuting and providing a healthy environment. The main objective of this study is the evaluation of site selection models of hospitals in Tabriz city considering quantitative and qualitative criteria in 3 levels of compatibility, desirability and capacity matrixes. Employing 13 indices and using the ArcGIS 9.2, Idrisi Andes, Index Overlay and AHP implications, site selection of hospitals in Tabriz city has been reexamined. The existing sites and spatial patterns of hospitals have been analyzed. Findings reveal that there has been insufficiency in the number of hospitals and hospital beds in some cases.
Urban Planning
Mohsen Ahdnejad; Saeed Najafi Najafi
Abstract
Studies indicate that the process of globalization and the concentration of poverty and richness of modern urbanization in most developing countries tends, Gap caused by the inefficiency of urban development plans in order to achieve the optimal spatial distribution patterns of informal settlements and ...
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Studies indicate that the process of globalization and the concentration of poverty and richness of modern urbanization in most developing countries tends, Gap caused by the inefficiency of urban development plans in order to achieve the optimal spatial distribution patterns of informal settlements and planned in urban neighborhoods that offer the possibility of head.What this research in comparative compared to the quality of life in Islamabad as informal settlement neighbourhood and Karmandan as planned in the city of zanjan based on indicators of economic, social, cultural, religious, Physical and environmental. Descriptive and analytical research using library resources and navigational analyze indicators of quality of life. Data into the software, Spss and then the comparative quality of life measures of model Vikor, AHP and to test the hypothesis of descriptive test, mean test inferential Chi (Chi - Squre) is used. The study indicated comparative study on the basis of the models undesirable situation indicators in the neighborhood of Islamabad to the Karmandan and the difference in Physical and economic indicators Dramatic. Which also change any of the parameters will change their quality of life. So be selectively removed glances and tried to improve the quality of life of citizens optimal planning.
Rural Planning
Mohammad Akbarpour; Firouz Jafari; Yashar Karimi
Abstract
Address the situation of rural housing is one of the basic programs of rural development in developing countries is most counties, especially. Due to the different nature of housing in rural areas andfunction its purpose, must-have features that are rural housing, housing in many rural areas, however, ...
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Address the situation of rural housing is one of the basic programs of rural development in developing countries is most counties, especially. Due to the different nature of housing in rural areas andfunction its purpose, must-have features that are rural housing, housing in many rural areas, however, the function of climate, vegetation and location are settlements.The purpose of this study was to investigate the rural housing in rural areas of the central part Hashtroud and evaluation criteria for affordable housing is a vision of society.Methodology The survey questionnaire is based on information collected in the questionnaire using SPSS statistical software was used.The research findings indicate that the residents of housing strength and resistance against disaster, not satisfied with the condition of heating and cooling systems and design and landscape standards of housing as well.Other findings indicate that the criteria related to adequate housing, building resistance against disasters and environmental health in the first place, area and size of housing, facades, new architecture and the use of local materials is the next priority.
Climatology
Masoud Jalali; Ali SHahbai; Vahab Kamrian
Abstract
In this paper, we attempted to identify the synoptic patterns of Summer heavy rainfall in the southern coast of the Caspian Sea by using environment- to- circulation method. To attain this aim , by using statistics of daily Precipitation of 40 synoptic and climatology stations located in the region for ...
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In this paper, we attempted to identify the synoptic patterns of Summer heavy rainfall in the southern coast of the Caspian Sea by using environment- to- circulation method. To attain this aim , by using statistics of daily Precipitation of 40 synoptic and climatology stations located in the region for periods of 20 years of 1991 to 2010 and by percentile method , 29 days have rain more than 15 mm which have occurred in at least 30 percents of region stations , were determined as days with heavy rain. By using factorial analysis and cluster analysis methods , 3 synoptic patterns were determined as agent of creating rain in 29 days that the first pattern 48.3 percent , second pattern , 30 percent and the third pattern have allocated 21.7 percent of days of heavy rain in the studied region. In order to synoptic analysis of these patterns , maps of sea level pressure , 500 hectopascal level , omega (atmosphere vertical motions) , vorticity and moisture flows of level of 850 hectopascal related to two days before rain was used until rain day and finally it is determined that the main cause of occurring heavy summer rainfall in southern coast of the Caspian Sea is the penetration high-pressure system and after that formation of cool and moist northern flows as well as incidence of vast convection in the region. Each three patterns emphasize on occurrence of this condition and their difference is the place of deployment of high-pressure system and consequently the number of rainy days and severity of rain in these days.
Urban Planning
Ebrahim Asghari-Kaljahi; Ghodrat Barzegari; Robab Azarmi; Azadeh Shahbazi
Volume 22, Issue 66 , January 2019, , Pages 23-44
Abstract
Site selection for landfill is an important issue for planning and management of solid waste materials on the metropolitan cities. In order to prevention of environmental, ecological and economical impacts of waste material, investigations for selection of suitable site should be done in a scientific ...
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Site selection for landfill is an important issue for planning and management of solid waste materials on the metropolitan cities. In order to prevention of environmental, ecological and economical impacts of waste material, investigations for selection of suitable site should be done in a scientific trend. Nowadays multi-criteria decision analysis methods and GIS systems are widely using for environmental planning.Shahindezh city with 35 tones daily waste material production is facing with environmental, social and healthy problems. In this research, in roder to selection of suitable site for landfill of Shahindezh city, some important criteria including hydrogeology, hydrogeology, litology, land use, vegetables developing, soil condition, topography, transmission lines, distance from city and main roads and faults are considered. After making pair-wise comparison matrix for the criteria, the weight of information layers determined by using of Expert Choice11 software in the GIS media based on Analytic Hierarchy Process (AHP). Therefore the appropriate zones for landfill of Shahindezh city are divided into four categories according to the location potential from completely suitable to completely unsuitable. As a result 6 areas are selected and subjected to visiting and filed investigations. In term of site visit, three areas are determined as proper locations. The selected areas are compared to each other based on similarity to the ideal choice by using TOPSIS method. Finally area no. 2 located in the west of Shahindezh (in the north of the upper Sarojeh village) was introduced as the best area for landfill site of this city.
Climatology
KARIM AMININIA; Ali Mahmoudei
Volume 23, Issue 68 , September 2019, , Pages 23-45
Abstract
One of the things done in the field of synoptic climatology is air typology. An air typology represents types of air that are similar enough in terms of particular atmospheric variables. The emergence of an air type in a certain area, on one hand, depends on the air masses entering to the area, and on ...
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One of the things done in the field of synoptic climatology is air typology. An air typology represents types of air that are similar enough in terms of particular atmospheric variables. The emergence of an air type in a certain area, on one hand, depends on the air masses entering to the area, and on the other hand, reflects the geographic conditions (roughness, adjacency to the masses of water, etc.) of that area. Since the geographic conditions of each area are usually constant, the difference in air types that come and go in the region is a function of the air masses that enter the area. Characteristics of the air masses while moving and crossing different areas, change, adjust and turn into another air. Given the fact that the repetition of air types determines the climate in an area, it is very important to identify the types of air. This is because without knowing the types of air dominating an area, management and planning will be very difficult and even impossible. This is while by identifying air types, it will possible to identify possible types of natural disasters in different sectors of agriculture, industry, etc. and prevent its damages. Since each type is related to circulation patterns, recognizing the characteristics, severity, and frequency of each type can show us their remaining time and duration of their domination, and help us in planning
Urban Planning
seyedeh parastoo bahernia; Hossein Nazmfar; Belal Mohsenzadeh
Abstract
Introduction Developments and growth of urbanization and uncontrolled growth of non-standard textures and unbalanced spatial and physical growth of urban neighborhoods have caused many problems in all fields and the occurrence of various crimes caused by urban design disorders and inappropriate ...
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Introduction Developments and growth of urbanization and uncontrolled growth of non-standard textures and unbalanced spatial and physical growth of urban neighborhoods have caused many problems in all fields and the occurrence of various crimes caused by urban design disorders and inappropriate textures of urban neighborhoods. One of the major problems in urban planning, given the population growth and physical development of cities, is the guidance of urban settlements in accordance with the principles of location. Today, with the increasing expansion of various criteria and criteria of urban planning, there is a need to use models and software that can consider all these criteria and according to a combination of them, meet the various needs of urban managers. Research shows that criminals are often rational in their choice of crime scene and are looking for the least dangerous and appropriate opportunities for crime. Thus, in the city limits, centers are formed that have more criminal opportunities and targets, and consequently higher crime rates. Attention to the space, as a direct factor in the occurrence of crime, in comparison with individual or structural factors, makes it possible to think of more practical solutions to prevent crime. As a result, the aim of the present study was to determine the effect of residential use criteria on crime reduction in Tabriz metropolis. The need to conduct this research with the aim of changing and modifying some uses and more control over residential uses with complex physical elements that are vulnerable to crime and achieving measures to reduce crime rates in Tabriz and help to improve safety and security in society Was. The result of the question that in this research, considering the problems raised in Tabriz metropolis, made the researcher's mind investigate; It was a crime among the citizens. Methodology The present study is applied in terms of purpose and analytical-descriptive in terms of the nature and method of data collection. The statistical population included experts in the field of housing patterns in reducing crime in Tabriz metropolis in 1396. According to the Tabriz Judicial Statistics Department, 60 experts were randomly selected and answered the questionnaire on the impact of residential use metrics in Tabriz metropolis with ten regions. The measurement tool was designed as a researcher-made questionnaire that includes 48 items in a 5-item Likert scale for the identified indicators using crime prevention approaches in residential patterns, which in the factor analysis confirm the removal of 3 items and finally with 45 items were designed. Results and discussion The present article was conducted with the aim of influencing residential use criteria in reducing crime in Tabriz metropolis. The results showed that planning and physical actions, planning and social measures and planning and security measures of high-rise residential uses have an effect on reducing crime in Tabriz metropolis with different values. The second and social indicators are the last priority. As a result, paying attention to the environment and residential patterns in crime prevention can be fruitful. Most theories have focused on physical actions and planning for residential use patterns in crime. However, with the rise of buildings and the lack of control and access to units and residents, theorists turned their attention to social measures and planning in these places and benefiting from the interaction and cooperation of residents in increasing control in such places. Security was considered. Therefore, in the present study, the three criteria of physical, social and security measures and plans and their indicators in reducing crime have been identified and evaluated by residential and criminology experts. Conclusion Based on the results of the present study on the effect of planned and social and security planning and residential measures on residential use reduction patterns in such places and in line with the theories and results of the mentioned research, it can be understood that due to population expansion And the lack of land to build residential areas in metropolitan areas, along with changing people's lifestyles and the increase in apartment living due to the consequences of modernity, as well as the advancement of technology and construction of towers and skyscrapers in metropolitan areas; For the construction of such residential premises in addition to construction and Legal instruments and attention to building strength and safety; in consultation with environmental criminologists and exchanging views with them, it is necessary to provide expert expertise in physical dimensions such as access control - environmental quality - natural monitoring and domination; social such as threshold capacity and social solidarity between Residents should consider preventing and preventing the occurrence of crime in such units. But these plans can be partially effective in reducing crime in these places. Residents also have responsibilities to improve the security of the building. As a result, paying attention to security in and around the building and neighborhood, along with physical and social planning, as a complement and catalyst can play a decisive role in reducing crime in such residential areas. One of the most important and effective interactions is mass monitoring as well as encouraging residents to participate.
Urban Planning
Elham Asiabanipour; Ali panahi; Hassan Ahmadzadeh
Abstract
Introduction The concept of a livable city means to be suitable for living or habitable, which has been very strong today by expanding and intensifying the problems human societies and the loose of quality of life. The word "livable cities" for the first time in 1970 by the national Arts organization ...
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Introduction The concept of a livable city means to be suitable for living or habitable, which has been very strong today by expanding and intensifying the problems human societies and the loose of quality of life. The word "livable cities" for the first time in 1970 by the national Arts organization in order to achieve their urban ideas and looking for it by other centers and research organizations such as the environmental protection organizations that has done extensive studies regarding the most of American cities was gone. Following the influence of this word in the literature related to this field can be searched in 1975 and the writings of William Marlins on the fields of livable in Saturday Review and Christian Science Monitor. Today, by expanding the problems of human societies and increasing their day to day (problems) has been greatly increased the quality of life indicators of residents of different places. Tabriz is one of the oldest cities in the country with regard to the historical, economic, cultural, health and industrial backgrounds of Tabriz metropolis, which has turned the city in to the first city in different fields. Today not only does not upgrade this roles and functions but also is in annihilation state. Because of its complex and multi-dimensional conceptual and its patterns vary from one region to another. So far a comprehensive model of the impact of the overall livability of cities on the present situation and the relationship between them is not defined. This paper tries to measure the present situation based on the appropriate models of Tabriz and the effect of the dimensions of livability on the situation in objective models based on scientific methods. Hence, the main objective of the present study was to determine the level of livability indices based on their impact on the situation in Tabriz metropolis using structural equation modeling technique. The output of this research helps urban managers and planners have a bright picture of the ecological sector of Tabriz metropolis. This article has been formulated based on scientific study and tracking to answer the following question. What conditions is the current condition of the city of Tabriz in different dimensions? and which indicators should be the first priority of the planners be given the amount of their impact on the present situation to achieve urban livability in Tabriz metropolis? Methodology This research is applied in terms of nature and is a descriptive-analytic method. The instrument was a questionnaire the statistical population in this research are the experts and urban managers with complete familiarity with the situation of each region, has a number of 140 people. According to the volume of society and Morgan table, 104 people selected by non-linear snow bullets and the question have taken place. Then the statues of livability using single sample T-Test and relationship between dimensions and livability in dices is analyzed with structural equation modeling whit Partial least squares method(PLS). Results and discussion Due to the increasing development of the life- level of Tabriz metropolis, requiring the main indicators and influence on the existing situation and communication between them. This research has provided new insight in to the livability of Tabriz metropolis that will detect the priorities of action in the decision space. Study of analysis of the present analyses regarding the current situation of Tabriz's livability in different dimensions generally, the average obtained in all dimensions (urban services and infrastructure, urban environment, urban economics, urban management, urban history and the urban community) were lower than the average and the results are not statistically significant only for urban community index that the results of this indicator are not generalized. Also, prioritizing indicators due to their impact on the present situation to achieve urban livability in Tabriz metropolis shows that highest share of urban services and infrastructure are (providing daily necessities in the neighborhoods, highways access, access to other neighborhoods in the city, access to workplace, the quality of water, electricity, gas and internet, Bank, quality of public transportation in neighborhoods, public transport work hours and distribution of public transport stations), that pays attention to urban managers and planners. Research findings show the current condition of Tabriz's livable situation according to the average of all ten areas in all dimensions is low that it has alignment with the findings of Rashidi and colleagues (1395) who have assessed the livability of Tabriz region in comparison with the Osku, Azarshahr, Bostan Abad, Tabriz, Shabestar and Herris. This findings with the findings of Ali Akbari and Akbari (1396), which has recognized the equitable distribution of facilities and services identified the main livability of the city of Tehran, the study of Aluria (2017) that the factors affecting on the quality of life of residents has expressed the distribution of urban services and also the ministry of Sustainable Management in India (2018) that physical index (with 45%) highest ranking in the livability standards. Conclusion This research, based on structural equations analysis shows that the services and urban infrastructure have the highest effect on the present situation of Tabriz metropolis livability In any attempt to improve the livability of Tabriz, it should be considered the role and position of this indicator. The results show that all aspects of livability in Tabriz metropolis have low average. The results of the model also show that among the influence factors on livability status, "urban infrastructure and services" and "urban environment", "urban management", "urban history" and "urban community" factors have a direct and meaning full effect, In the meantime, the "urban infrastructure and services" factor has the greatest impact which has a motivation of Tabriz metropolis livability. As a result, any program and attempt to initiate and upgrade of the livability of Tabriz status need attention to the key role of these factors. But what is particularly the achievement of the present study is preparation of appropriate bio-model with the new scientific methodology Partial least squares (PLS) based on present conditions.
