Saeed Jahanbakhsh; Majid Rezaee Banafshe; Marziyeh Esmaeelpour; Masoomeh Tadayoni
Volume 16, Issue 40 , September 2012, , Pages 25-46
Abstract
Accurate estimating of potential evapotranspiration is essential for many studies related to agriculture and water balance. This study was carried out with the aim of surveying models for estimating potential evapotranspiration in the southern basin of Aras river. For this purpose, the monthly data of ...
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Accurate estimating of potential evapotranspiration is essential for many studies related to agriculture and water balance. This study was carried out with the aim of surveying models for estimating potential evapotranspiration in the southern basin of Aras river. For this purpose, the monthly data of 6 stations including mean air temperature, minimum and maximum temperature, wind speed, sunshine hours, mean and minimum relative humidity were used in the statistical period of 20 years (1986-2005).
After reconstruction missing values and controlling stations for being reference (well irrigated) or non reference, potential evapotranspiration values were computed applying 9 methods (FAO- Penman- Monteith, Blanney-Criddle, Hargreaves-Samani, Makkink, Turc, ASCE standardized method, Kimberly- Penman, Penman and Priestly-Taylor) in REF-ET software. For determining best method, calculated potential evapotranspiration values were compared with evaporation pan values by using correlation coefficient and root mean square difference. Results indicated that there was significant correlation between Blanney-Criddle and pan evaporation values. Therefore, Blanney-Criddle model was selected as the best model for the study area. Afterwards, based on the above mentioned model and also the use of interpolation technique, the potential iso-evapotranspiration map was drawn for the southern basin of the ArasRiver.
Saeed Jahanbakhsh Asl; Batool Zeynali; Tahereh Jalali
Volume 16, Issue 39 , May 2012, , Pages 25-49
Abstract
In this research amount of seasonal effect of the Mediterranean Sea surface temperature (MedSST) has been investigated on seasonal precipitation of East Mountainsides of Zagros and Iran Central basins. For this purpose, warm, cold and base periods were determined for dates of MEDSST[1] in statistics ...
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In this research amount of seasonal effect of the Mediterranean Sea surface temperature (MedSST) has been investigated on seasonal precipitation of East Mountainsides of Zagros and Iran Central basins. For this purpose, warm, cold and base periods were determined for dates of MEDSST[1] in statistics period of (197-2005) for every season. Then statistic Medians of precipitation were determined so as (Rw, RC and Rb)[2] in each period and for all stations. Theses medians in every season and period were compared to specify amounts of these effects. The results indicated when MedSST is colder than base in winter season, precipitation of winter increases in the studied regions, but the temperatures of warmer than base in autumn increase autumn precipitation. Also MEDSST of colder than base of autumn is the cause of precipitation increase in winter and MEDSST of warmer than base of summer is cause of precipitation increase in autumn. The results of correlation analysis indicated that between oscillations of MEDSST and precipitation in winter there is negative correlation, in autumn it is positive correlation and between oscillations of MEDSST in autumn season and precipitation in winter season there is negative correlation. Between anomalies of MEDSST in summer and precipitation of autumn there does not exist any relevant correlation but between increases of autumn precipitation of the study region and warmer than normal MedSST of summer season the trends exist.
[1]- Mediterranean Sea Surface Temperature (MEDSST).
[2]- Rain Median of Warm period, Rain Median of Cold period and Rain Median of Base period of Mediterranean SST.
Karim Hosseinzade Dalir; Laleh Ashena
Volume 16, Issue 37 , November 2011, , Pages 25-57
Abstract
Iranian past architecture and urban planning, because of its creativity and sustainable features, has a specific location, but in contemporary age, due to various factors, especially following western industrialized features, separated from its origins and sometimes has been declined.
New methods, by ...
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Iranian past architecture and urban planning, because of its creativity and sustainable features, has a specific location, but in contemporary age, due to various factors, especially following western industrialized features, separated from its origins and sometimes has been declined.
New methods, by neglecting the past and without considering traditional ideas, have changed national and cultural features of the country. Spiritual principles of Iranian traditional urban planning have originated from its ideas and culture. Order as a spiritual principle, represented clearly in Iranian traditional urban planning, so it can be a strong base for the continuity of this rich culture. Baazar, as one of the important spaces in Iranian traditional cities, reflects clearly the principle of order. In this paper, based on library studies, by representing a clear meaning of order and studying this principle in the structure of Baazar as an important and basic structure of traditional cities, the necessity of reviewing the principles of traditional cities, especially their application in contemporary urban planning, has been emphasized. This paper, by emphasizing on the Bazaar, focused on the concept of order. The aim of this paper is recognition some parts of traditional principles to meet the needs of modern urban spaces. This paper represents a clear conceptual meaning of order, as an important factor in the formation of traditional cities, related concepts, effective factors and origins of its formation in Iranian traditional cities. This paper put emphasis on the use of the principle of order in urban planning for the promotion of the quality of modern urban spaces.
Hadi Hakimi; Mohammadreza Pourmohammadi; Akbar Parhizkar; Abolfazl Meshkini; Mehdi Pourtaheri
Volume 17, Issue 46 , February 2014, , Pages 25-45
Abstract
Informal settlements were formed as the shadow cities after the industrial revolution and the geographical redistribution of population in Europe. Informal settlements were slowly appeared after industrialization and modernization process as a main characteristic of almost many cities of developing countries. ...
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Informal settlements were formed as the shadow cities after the industrial revolution and the geographical redistribution of population in Europe. Informal settlements were slowly appeared after industrialization and modernization process as a main characteristic of almost many cities of developing countries. However, this phenomenon acted as an attenuating phenomenon in European countries and over the time and in the context of the location they were solved in the heart of the cities. Therefore, this phenomenon is now confined to the cities of the developing countries. Even the cities in developing countries like our country are also feature this phenomenon. Khoy middle city is not an exception of this rule. This research is classified as an explanatory analytical survey. Like most survey researches, this study focuses on a limited sample and the sampling method is the probable classification technique. In other words, all informal settlements in Khoy city are classified into four geographical categories amongst which four districts were randomly selected. The main purpose of this research was identifying the relationship between development and the increase of residents’ numbers in informal settlements and for this the hypothesis of study was that there was a significant relationship between urban and rural development and the increase of residents’ numbers in informal settlements in Khoy. The results indicated that in contrast to the expectations of many researches in this area, the number of residents in informal settlements would increase with increasing level of urban and rural development.
Climatology
abasali Arvin
Volume 19, Issue 52 , June 2015, , Pages 25-42
Abstract
Variations of ozone layer that measure by name of total ozone (TO) oscillation are one of the modern humane concerns as one of causes or manifestations of climate change. In this research total ozone oscillation in relationship with Sea Surface Temperature (SST) in Pacific Ocean has been studied. For ...
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Variations of ozone layer that measure by name of total ozone (TO) oscillation are one of the modern humane concerns as one of causes or manifestations of climate change. In this research total ozone oscillation in relationship with Sea Surface Temperature (SST) in Pacific Ocean has been studied. For this aim monthly mean data from the satellites in point by 1*1.25 degree of geographical distance and monthly mean of NINO1+2, NINO3, NINO4 and NINO3.4 indices have been used. The results show that total ozone in positive\negative occurrence of SST has been increased\decreased in all Iranian areas. The asynchronous relation of effects SST indices have been tested on (TO). The strongest relations in lag time of months 5, 1, 5 and 2 respectively are for NINO1+2, NINO3, NINO4 and NINO3 indices. The correlation of NINIO1+2 with TO are better than other indices and the strongest correlation was in west and northwest of Iran. The average of synchronous and asynchronous (5 months lag time) correlation coefficient between NINIO1+2 with TO on all areas of Iran was respectively r=+0.55 and r=-0.621. The in synchronous correlation was direct and significant at 0.05 level in 86 precent of areas of Iran but asynchronous correlation was indirect and significant at 0.05 level The relation of NINO4 with (TO) was the weakest correlation in other indices.
Mohsen Aghayariehir; Migat Habibyan; Mehdi Ostadiejafari; Hamed Aminishirazi
Volume 19, Issue 53 , September 2015, , Pages 25-47
Abstract
Nowadays, while there are a number of definitions have been introduced for the concept of zoning, there is no general consensus due to different disciplines adopt this term. In the field of planning, the zoning is a conscious and contemplative process to detect homogenous areas by an authority to allocate ...
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Nowadays, while there are a number of definitions have been introduced for the concept of zoning, there is no general consensus due to different disciplines adopt this term. In the field of planning, the zoning is a conscious and contemplative process to detect homogenous areas by an authority to allocate certain kinds of resources to them. Therefore, the process of zoning is an essential task to allocate and monitor the development projects for different type of territories. In this article, zoning is took into consideration from the rural transportation point of view to find what would be the homogeneous zones of rural transportation for Iran? To answer this question, an in-depth spatial analysis through the Geographical Information System (GIS) is performed with regards to a descriptive-analytical method. Based on four main indices which are fully explored in the paper (i.e., access to the link road, distance to urban hierarchical levels, rural density and land use), five homogenous distinct zones for Iran is emerged. The resulted zones which are presented on a country map would be useful for future rural transportation planning in Iran.
Urban Planning
tohid ahmadi; zohreh fanni; mohammad tagi razaviyan; jamileh tavakoli nia
Volume 23, Issue 67 , April 2019, , Pages 25-44
Abstract
Metropolises are as population and traffic density centers and their consequences are more than other population centers. Various metropolises present different solutions based on their circumstances and characteristics of transportation. The major issue about transportation in metropolises is weakness ...
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Metropolises are as population and traffic density centers and their consequences are more than other population centers. Various metropolises present different solutions based on their circumstances and characteristics of transportation. The major issue about transportation in metropolises is weakness of strategic plans in order to apply the plans for intelligent transportation system that impresses urban transportation. Management organization of transportation in metropolis of Tabriz presents some solutions sporadically that are not enough to solve traffic problems. The purpose of this study is to present a model to prioritize development strategies for intelligent transportation system in order to cover strategic plan for transportation management. In other words, this paper is concentrated on combination model of prioritize strategies. The procedure of this research is that after literature review, development strategies of intelligent transportation system which is as a result of logic and scientific management model (ANP،QSPM), is prioritized by using strategic approach. For achieving this goal, combination procedure is done and the relationship of different variables to present the real priority of strategies is considered. Finally, findings of this combination procedure are compared by using Spearman rank order correlation. The result of combination procedure and comparing it with Spearman rank order correlation illustrate that strategy entitled “coordination of all organizations to enhance public infrastructure in order to develop intelligent transportation system” in both analysis (QSPM and ANP) is prioritized as a major strategy and other strategies have different priorities.
All other Geographic fields of studies , Interdisciplinary
faramarz barimani; Mehdi Ramezanzadeh; Nazanin Tabrizi; sahand nozarasl
Abstract
Worldwide studies show that health is a vital stimulus that encourages older people to participate in tourism (Horneman et al., 2002), and the type of tourism that is encouraged and promoted by health is health tourism. Therefore, the services needed for health tourism are important. Today, health tourism ...
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Worldwide studies show that health is a vital stimulus that encourages older people to participate in tourism (Horneman et al., 2002), and the type of tourism that is encouraged and promoted by health is health tourism. Therefore, the services needed for health tourism are important. Today, health tourism is spreading in a variety of sites, including hot springs, mineral water springs, seas and areas with suitable climate (Pollock et al., 2000), and many countries are competing in this regard. Health tourism is a comprehensive journey focused on developing, maintaining and improving the body, mind and soul (Smith&Kelly, 2006). This type of trip is usually attractive for people over 50 who are economically rich and looking at health tourism as a lifestyle and also have experienced work stress (Smith & Puczko, 2009). Therefore, these activities are intended for the comfort of "people over the age of 50", "older people" and "elderly tourists". (Chen et al., 2013). Therefore, considering the significant global growth of tourism in the hot springs and the natural resources inside the country, it is necessary to make further efforts to achieve a suitable regional and global position in various health tourism branches such as hydrotherapy. Iran has over 1000 mineral springs and Mazandaran province with 40 hot and mineral springs has most resources after West Azerbaijan province. One of the influential and active hubs of the province in this regard is Ramsar.
Farnaz Pourasghar; Saeed Jahanbakhsh; Behrooz Sari saraf; Hooshang Ghaemi; Masomeh Tadayoni
Volume 17, Issue 44 , September 2013, , Pages 27-46
Abstract
This is a study of change in annual precipitation amounts and variability in southern part of Iran during 1974-2005. Southern part of Iran has been regionalized based on six factors in 183 stations using Principal Component Analysis (PCA) and Cluster Analysis (CA). The stations were grouped into four ...
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This is a study of change in annual precipitation amounts and variability in southern part of Iran during 1974-2005. Southern part of Iran has been regionalized based on six factors in 183 stations using Principal Component Analysis (PCA) and Cluster Analysis (CA). The stations were grouped into four individual clusters. Topography and latitude play an important role in determining boundaries between identified subdivisions and existence of spatial differences between them as well. Spatial variability and relationship between the precipitation series at 183 of stations were investigated by principal component analysis. A PCA of annual precipitation reveals five components that account for 68% of the total variance. The annual precipitation PCs are controlled by atmospheric circulation. Analysis of the results revealed that annual precipitation in south part of Iran is mainly related to Sudan and Mediterranean wave.
Majid Hosseini; Mohammad Ghafouri; Mahmoodreza Tabatabaee; Masood Godarzi; seyed asadollah Hejazi
Volume 17, Issue 45 , November 2013, , Pages 27-41
Abstract
One of the main concerns in recent years with regard to climate change and global warming is how to efficiently manage the water resources of the world. Insufficient or unavailable hydroclimatological data further aggravate the difficulty of good water management. Hence the use of hydrologic and hydraulic ...
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One of the main concerns in recent years with regard to climate change and global warming is how to efficiently manage the water resources of the world. Insufficient or unavailable hydroclimatological data further aggravate the difficulty of good water management. Hence the use of hydrologic and hydraulic models is a possible solution to ease the job of the water managers. In this research, Soil and Water Assessment Tools (SWAT) are used to predict and validate the discharge in Taleghan Watershed of Iran. The inputs required include soil, land use and DEM layers with hydroclimatological data. Statistical methods were used for calibration and validation of the SWAT model. The results indicate that the observed and predicted discharge have the least mean absolute relative error both in the annual and monthly periods. From the SPSS analysis, these values were found to be not significant at 95% probability for the annual and monthly discharges for the calibration and validation periods. The study illustrates the usefulness of the SWAT Model in predicting runoff components in a watershed. The annual results in Taleghan catchments during 1987 and 2007 indicate an increasing 7.3% surface runoff and decreasing 11.3% and 11% interflow and groundwater flow respectively.
Geomorphology
Sayyed Asghari Saraskanrood
Abstract
The purpose of this study is analysis of affecting factors in pattern forming and channel dynamic in mountainous Intervals of Garangu River between Khorasanak villages in Hashtrood to input of river in Mianeh city. The pattern of research is comparative – deductive. materials of research are include ...
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The purpose of this study is analysis of affecting factors in pattern forming and channel dynamic in mountainous Intervals of Garangu River between Khorasanak villages in Hashtrood to input of river in Mianeh city. The pattern of research is comparative – deductive. materials of research are include of Topographic map, Geological map, flow Hydrological data, data provided from Dem and field data. In this research were used methods of River Power Analysis, River specific power, Sinuosity Index, Central angle, Route Sinuosity and longitudinal profile analysis in order to channel pattern and dynamic analysis. Results indicated that forming of channel pattern and dynamic in studied area was controlled by lithological features of sections. So channel dynamic in sections such as section 1 is impressed by lithological resistance of river bed and sides mainly bed deepening and it in sections such as section 10 is impressed by erodibility and loose formation mainly bed Widening that it was controlled by river lithological features strongly. The results of this study can be used to identify of interval Maximum River power and interval affected by river erosion.
Climatology
nader pir moradian; hossein hadinia; afshin Ashrafzadeh
Abstract
Abstract Prediction and evaluation of meteorological data in effect of climate change is very important especially in water resources management. LARS is a model that generates weather data and predicts weather parameters by downscaling global circulation models (GCM). In this study, in order to evaluate ...
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Abstract Prediction and evaluation of meteorological data in effect of climate change is very important especially in water resources management. LARS is a model that generates weather data and predicts weather parameters by downscaling global circulation models (GCM). In this study, in order to evaluate 15 GCM models performance in simulating the minimum and maximum temperature, radiation and precipitation in Rasht synoptic station (2011-2012), statistical downscaling of each model was performed by LARS model. Then, the mentioned data were predicted on the basis selected GCM models for 2013-2042 and 2043-2072 periods. The results showed that the highest increase in annual average of minimum and maximum temperature will occur during the 2043-2072 periods with 1.3 and 2.0 °C, under A2 scenario, respectively. The amounts of radiation will decrease in future periods for all seasons. The highest decrease (143.4 MJ m-2) of radiation will occur in 2013-2042periods in winter under A2 scenario. The seasonal precipitation will often increase in future periods. The highest increase of seasonal precipitation (55.5 mm) will occur under B1 scenario in 2043-2072 periods for autumn.
Urban Planning
Mahdi Alilu; elham kazemi; Mohammadreza Pourmohammadi
Volume 23, Issue 70 , March 2020, , Pages 29-57
Abstract
City is the most important habitat for the man and the greatest cradle of civilization. Due to this fact, studying this phenomenon is of paramount importance. The problem today is that in the contemporary society many of Islamic traditions have been neglected. The impact of religious values on the construction ...
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City is the most important habitat for the man and the greatest cradle of civilization. Due to this fact, studying this phenomenon is of paramount importance. The problem today is that in the contemporary society many of Islamic traditions have been neglected. The impact of religious values on the construction of city spaces is of even greater importance. Cities are created according to ideologies and worldviews and the most sublime example of space occupation is Islamic beliefs and values. The mosque in an Islamic city, for instance, has been a site of political, nonmilitary, legal and economic gatherings. Nowadays, some religious rituals and ceremonies are held in spaces other than mosques and due to the paucity of favorable and appropriate space in the cities, streets and roads are occupied and traffic problems created. 200 students participated in this study and a close-ended questionnaire with a rating scale of 5 was used to gather data. In this article I have tried to emphasize the necessity of holding religious rituals out of mosque space, and suggest and provide the procedures needed for the definition and formation of appropriate spaces for the aforementioned rituals and ceremonies.
ahmad asadi; Mohammad Reza Pourmohammadi
Abstract
Introduction ach form of urban development has its own characteristics and disadvantages or advantages. But the common denominator of all these development patterns has been responding to the growing development of cities and preventing irregular growth. In recent years, with the emergence of new ideas ...
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Introduction ach form of urban development has its own characteristics and disadvantages or advantages. But the common denominator of all these development patterns has been responding to the growing development of cities and preventing irregular growth. In recent years, with the emergence of new ideas in various political, economic and environmental sciences, the growth and development of cities has become intelligently considered. Internal development is an essential part of smart urban development. Internal urban development policy is one of the three urban development policies that, along with other urban development policies; Connected or continuous development or separate or discontinuous urban development policy is proposed. In parallel with the horizontal growth of the city towards the suburbs and the destruction of lands and natural environment around the city, some spaces inside the city have been abandoned and have been left out of the development process. These abandoned spaces, called "infill-level" spaces, are important because they are located in cities, have underground or day-to-day facilities or equipment, and have access to such service centers and facilities. For example, in many of the old cities of Iran, the core of the city, which is considered in the form of historical and valuable worn-out texture, has such potential. The aim of this study was to investigate the effect of infill development strategy on the components of vitality and social desirability in the worn-out tissue of Zanjan city. Methodology This research project in nature is an applied investigation and based on methodology is considered attributive- analytical project. Also using GIS techniques and FUZZY-AHP model required maps was provided and in each map Zanjan city’s deteriorated areas infill development specified and in final map under studying area’s internal development characterized as low, average and high developed areas. The questionnaire was used to measure the variables of vitality and social desirability. The sample size is 382 questionnaires that have been selected from the statistical population of worn-out tissue of Zanjan city using Cochran's formula. The research findings show that infill development has a positive effect on promoting vitality and social desirability in worn-out tissues, and there is a significant relationship between infill development with vitality and social desirability variables. Therefore, it can be said that vitality and social desirability are significantly different from infill development (less, medium, high). Results and discussion 17 items have been selected to measure vitality, and according to descriptive statistics, vitality in the range will increase with increasing level of infill development. The rate of vitality score in neighborhoods with low intermediate growth development is 46.77, in neighborhoods with medium infill development is 52.63 and in neighborhoods with high infill development is 53.82. Also, each of the vivacity items is examined separately. The score of each of the items is between 1 and 6. To measure the level of social desirability, 14 items have been selected. The level of social desirability is improved according to the increase in the rate of infill development, and according to the average score of the social desirability variable, this can be realized. The rate of social desirability score in neighborhoods with low infill development is 44.98, in neighborhoods with medium infill development is 50.66 and in neighborhoods with high infill development is 52.12. Conclusion In studies of infill development, the potentials of different urban neighborhoods have been examined using the principles of infill development and its relationship with other variables has not been investigated. However, in this study, the relationship between infill development and the variables of vitality and social desirability in the worn-out context of Zanjan city has been investigated, which is a new discussion. This can determine the benefits of infill development. The findings show that the higher the infill development of neighborhoods, the higher the level of vitality and social utility. In the dilapidated context of Zanjan, neighborhoods with high infill development (neighborhoods above Imam Street) are in a better position in terms of quality of life and social acceptance than neighborhoods with low level of infill development (neighborhoods around the Husseinieh Azam Zanjan). Therefore, it can be said that the higher the level of infill development, the better the security, the beauty of urban spaces, the diversity of activities, the physical diversity, the presence of women in the place, the compatible uses, the vitality of the citizens, and so on.
Geomorphology
Mojgan Entezari; Hamide Gholamhaydari; Haji Karimi
Abstract
IntroductionMainly containing thin gypsum units, evaporite formations cover 8% of the Earth's surface and 25% of the Earth's continental surface (Ford and Williams, 2007). The term karst refers to a set of geological processes and the phenomena resulting from the dissolution of carbonate rocks. Decomposing ...
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IntroductionMainly containing thin gypsum units, evaporite formations cover 8% of the Earth's surface and 25% of the Earth's continental surface (Ford and Williams, 2007). The term karst refers to a set of geological processes and the phenomena resulting from the dissolution of carbonate rocks. Decomposing the structure of the rocks forms a unique hydrological regime, leading to the development of special landforms (Ministry of Power, TAMAB, 1994). In general, the eight elements needed to develop a karst are: precipitation, relief, lithology, thickness of carbonate layers, carbon, low temperature, pressure, and tectonic rocks (White, 1988). Sinkholes are the enclosed depressions that are known as the characteristic of carbonate and evaporite karst landscapes. In recent years, several genetic classifications have been published for sinkholes (Gutierrez et al., 2008).Materials and methodsTo conduct this research, a 160,000-m2 area of the Gachsaran formation in Maroon plain with a high density of sinkhole was examined and visited. The exact geographical location and specifications of 51 sinkholes were surveyed, and it was found that the sinkholes totally account for 25% of the surveyed area. Table 1 lists the specifications of the sinkholes. Also, in another field visit conducted in this study area, a sub-basin with an area of 6.2 hectares, average slope of 28%, and length of 2301.7 m was selected for the surface runoff sampling during the precipitation, which also included a number of previously surveyed sinkholes. The surface runoff samples taken included the first moment of runoff onset, which began 3 hours and 27 minutes after the start of precipitation. Then, 5:19, 5:45, 8:10, 9, and 9:20 after the start of precipitation, other samples of surface runoff were taken again to monitor the changes in the ions dissolved in the runoff in the spatial and temporal intervals. The minimum height of this sub-basin is 520 m, and its maximum height is 888 m above sea level. Also, in this regard, to estimate the average long-term rainfall of the region from the 20-year rainfall data of the meteorological stations in the study area, the daily rainfall data of the Maroon meteorological station in the vicinity of the study area, 1:100,000 geological map of Behbahan sheet, 1:50,000 topography, and 10-m DEM of the study area were used as the research data.Results and DiscussionThe obtained results showed that a total of 25% of the surveyed area is covered with the surface and visible sinkholes. It should also be noted that the dissolution in the Gachsaran formation is not the only erosion process that is taking place. In addition to the dissolution of gypsum, the marls of this formation are eroded by the surface runoff due to the precipitation and leave the basin as a suspended load, which accelerates the formation of sinkholes. Therefore, it can be stated that the time interval estimated in this study can be shorter, because the effect of the accelerating factor of the suspended load was not calculated, which requires the investigation and study to calculate the suspended load. Directing the runoff by sinkholes to downstream areas is likely to lead to the same expansion of the underground karst and tunnel, which is not visible. Also, it is not clear how many cavities and tunnels formed in the subsurface of this area, but this is not expected to be low based on the obtained results. There are roads, agricultural lands and, more importantly, residential areas on the gypsum zones, at least 25% of which are visible sinkholes, and the subsurface tunnels that are expanding every year at this dissolution rate. In addition to the effective rainfall, the presence of agricultural lands requiring continuous irrigation and intensifying the dissolution rate can lead to surface collapses and expansion of sinkholes, which ultimately threatens the life and financial security of the inhabitants in these areas.ConclusionBased on the field observations and the conducted studies, the sinkholes in the stream course have a generally elongated form and often have several ponors. Given that the sinkholes do not retain the aggregated runoff inside the sinkhole and the runoff exits through the same ponors, such diversity in the number of ponors results in a number of sinkholes in the stream course, which are connected together through a subsurface path. Unlike calcareous sinkholes that can direct the runoff current to karst aquifers, water is rapidly saturated due to the high solubility of gypsum. The dissolution is mainly limited to the opening area of the sinkhole, and less runoff finds the opportunity to expand the sinkhole in depth. It should be noted that based on the results, to increase the safety factor and reduce the risk of gypsum dissolution, it is necessary to monitor and study the subsurface area and to examine the subsurface cavities and tunnels that have formed so far. Finally, to reduce the risks of the dissolution rate, some arrangements such as sinkhole risk zoning should be made. This is because the cavities in the gypsum layers with the high dissolution rate can easily expand and prepare the conditions for the sudden collapse so that the whole plain suffers the collapse, incurring human and financial losses.
All other Geographic fields of studies , Interdisciplinary
Asghar Asghari Moghddam; Mir sajad Fakhri; Morteza Najib
Volume 19, Issue 54 , February 2016, , Pages 19-41
Abstract
Purpose of this study is zoning of Marand aquifer vulnerability mapping using DRASTIC, AVI methods and comparing their susceptibility adopted from these methods. The DRASTIC method is a combination of seven measurable hydro-geological characteristics that are effective on transportation of contaminant ...
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Purpose of this study is zoning of Marand aquifer vulnerability mapping using DRASTIC, AVI methods and comparing their susceptibility adopted from these methods. The DRASTIC method is a combination of seven measurable hydro-geological characteristics that are effective on transportation of contaminant into groundwater. The GODS and AVI methods combine four and have two properties respectively. The DRASTIC method results is the most complete index for assessing groundwater vulnerability, which has been estimated the vulnerability for the study area as moderate 50.4 percent, high 32.9 percent and very high16.7 percent. The GODS method results suggest three classes for the Marand aquifer vulnerability including moderate, high and very high with 43.8, 5.16 and 51.04 percent, respectively. Also the AVI method results indicate that the aquifer has a vulnerability of moderate, high and very high with 39.13, 6.5 and 54.37 percent, respectively. In all three methods, the degree of vulnerability in the East, Southeast and Northeast parts of the pain is more than the central and western parts of the pain. DRASTIC model is determined the vulnerability areas more accurately due to having more features and different weighting of the features based on their role in pollution.
Geomorphology
gholam hassan jafari; Frozan Naseri
Abstract
Doline is one of the most characteristic and basic surface and morphological forms of karst, as a result of the chemical effect of water on limestone that occurs in different shapes and sizes. Dolines differ in morphological characteristics. In the present study, after identifying the valleys in the ...
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Doline is one of the most characteristic and basic surface and morphological forms of karst, as a result of the chemical effect of water on limestone that occurs in different shapes and sizes. Dolines differ in morphological characteristics. In the present study, after identifying the valleys in the karst areas of the Zagros, their dispersion and change of morphological characteristics such as length, width, area and depth in relation to altitude and climate, citing documentary sources such as geological maps 1: 100000, digital elevation model layer with strength 12.5 m resolution, satellite imagery, 1: 50,000 topographic maps, and 49-year-old Esfzari temperature and precipitation databases were analyzed in Arc GIS, Mapper Global, and Excel software. The study of different parameters of Zagros valleys in different altitudes and climates indicates that their shape and depth have been affected by Quaternary climate change. At lower altitudes, where water is more involved in dissolution than low temperatures, the dolines are nearly circular in shape and stretch at higher altitudes and the lower the temperature and the greater the likelihood of the doline turning into a glacial-doline circus, the more elongated the doline becomes. The compression coefficient of the dolines also indicates that their elongation and length increase with increasing height; in this way, at an altitude distance of 500-1000 meters, the ratio of circles for every 1000m increase in height increases by 0.8 and the compression coefficient decreases by 0.9. At an altitude distance of 1000-2000m, with each increase of 100m, the ratio of circles is 0.44 and the compression coefficient is 0.1. In the 3700-3000m floor, the circular ratio decreases by 1.2 with each elevation of 1000m, and the compaction increases by 1.3.
Mohammadreza Pourmohamadi; Hassan Mahmoudzadeh; saman salavati
Abstract
Since the beginning of human being creation and beginning to live in this world, man has faced the threat of terrorism and has always tried to balance security threats and human needs. In this context, passive defense is one of the most effective and lasting means of defending against threats from a ...
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Since the beginning of human being creation and beginning to live in this world, man has faced the threat of terrorism and has always tried to balance security threats and human needs. In this context, passive defense is one of the most effective and lasting means of defending against threats from a long history of human. One of the solutions has proposed to reduce injuries in the threat situations is the use of open spaces . Therefore, the purpose of the research is to evaluate urban open spaces and its role in reducing vulnerability during crisis with the passive defense approach in Tabriz . The present research is descriptive-analytical and with applied approach. Sampling were selected from 100 residents of Tabriz decuple regions from questioning surveys. The data were analyzed using ARC GIS software and multi-criteria decision making methods, MCDM and fuzzy analysis. The results showed that among the weight of sub-criteria, outdoor space has the highest weight with 0.621 value and the lowest weight was assigned to the sub-criterion of relative self-sufficiency 0.023 and according to the final map of fuzzy overly map, the area of open space in reducing the vulnerability of 10 regions was 4253469 m2 with the lowest area 5.55 percent and highest area 19.39% Equal to 14849144 m2 and has the most favorable open spaces in decreasing vulnerability, and in the among of 10 regions of Tabriz, region of 5,6,7, and 9 have an important role in decreasing of vulnerability and region of 1,2,4, 8,9 and 10 have the less effect in decreasing vulnerability.
Urban Planning
amir oshnooei nooshabadi; mahshid mohammad ebrahimi
Abstract
IntroductionIn recent decades, in parallel with theories of sustainable development and sustainable urban development, the idea of improving the quality of life, which in turn makes cities more livable, has found its place in urban planning literature and, therefore, the ability to have Livelihoods ...
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IntroductionIn recent decades, in parallel with theories of sustainable development and sustainable urban development, the idea of improving the quality of life, which in turn makes cities more livable, has found its place in urban planning literature and, therefore, the ability to have Livelihoods are essential for cities. This article has selected one of the most talented central cities of the country, namely Kashan city, as the scope of research, which has excellent features such as tourist attractions, historical and cultural history, natural attractions and so on. On the other hand, in this city, issues such as; Widespread unemployment and employment issues, the phenomenon of marginalization, lack of recreational and leisure facilities, high housing prices and rents, and so on. In order to eliminate these negative effects from the spaces of this city, it is necessary to identify and analyze the key factors affecting livability with a future research approach. The main question of the research is what are the key factors affecting the future situation of livability in Kashan?MethodologyThis research is based on the purpose of applied research and according to data collection methods, it is descriptive-analytical research and its data collection method is "documentary and field" in which the researcher-made questionnaire was used. The research method is based on the futures approach and its horizon is 1415. The statistical population was 15 experts and specialists. Futurism projects use a set of techniques and methods that often complement each other, and the outputs of each form the inputs to the next method. Micmac and Scenario Wizard futures software and Delphi method have been used to review and analyze the data. Propulsion forces are prioritized based on the opinion of specific experts and then these factors are prioritized based on the degree of importance and uncertainty, and the most critical factors are used to write down possible scenarios. Results and discussionIn this study, 24 factors were identified as effective factors of biodiversity indicators in Kashan. The identified factors are then analyzed with Mick Mac software to extract the main influential factors. The dimensions of the matrix were 24. 24. The degree of saturation of the matrix is 84.22%, which shows that the selected factors have a great and scattered effect on each other, and in fact, the system has been in a state of instability. According to Table 1, out of a total of 488 measurable relationships in this matrix, 88 were zero, which means that the factors did not affect each other or were not affected by each other.58 The relationship was one, meaning that the effect was relatively small. Together, 163 relationships were numbered 2, meaning that the influential interface was relatively strong, 174 relationships were 3, meaning that the key factor relationships were very large and highly effective. Finally, 93 relationships had a P number that indicated the potential and indirect relationships of the factors.ConclusionThe results of this study indicate 5 scenarios with different combinations of three situations, desirable, static and critical, which are likely to occur in the viability of Kashan city, which unfortunately, the probability of negative (critical) events is more than positive (desirable) events. However, 51.1% of the critical situation, 17.8% in the static state and 31.1% in the optimal state of the scenario page. With this situation, it seems that the favorable and stable conditions have occupied a smaller part of the scenario page and the critical situation is in the first priority and according to the results of these scenarios, it is clear that in Kashan's habitability, conditions are likely to occur. More critical, but less likely to occur. A very important point in the results is the relative distance of the level of desirability in the best case scenario with the ultimate living objectives of Kashan city. Assuming that the best scenario, which is Scenario 1, occurs among the five scenarios, it does not indicate the desired viability of Kashan in the future. In the most optimistic case scenario, one in four scenarios out of five scenarios affecting urban viability will be in an almost favorable situation, with only four desirable scenarios alone, and the other four scenarios have a much lower utility ratio. On the other hand, assuming that the worst possible situation, scenario 5, occurs in the viability of Kashan city, in this scenario we will see 6 critical situations in the scenario that we will not see a favorable situation in Kashan city.
Urban Planning
Ali akbar Taghipour; Benyamin Hasanzadeh Baghi; Parsa Ahmadi Dehrashid
Abstract
pedestrian zones are places that help improve the physical and mental health of people and their social mobility, creating human spaces and the identity of cities. But these conditions will be realized when the pedestrian zone is built based on the needs and expectations of the citizens. Therefore, the ...
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pedestrian zones are places that help improve the physical and mental health of people and their social mobility, creating human spaces and the identity of cities. But these conditions will be realized when the pedestrian zone is built based on the needs and expectations of the citizens. Therefore, the city management must be aware of the factors that are of great importance in pedestrian zones from the point of view of citizens and also check the success rate of pedestrian zone construction projects to solve the defects and problems in these spaces. In this research, by considering a complete set of factors affecting the quality of the pedestrian zone and using a method different from other previous researches, it was tried to evaluate these factors in the two phases of the pedestrian zone in Rasht city from the citizens' point of view, so that in addition to finding the most important factor, two phases The pedestrian zones are also compared to each other. The research method is applied based on the objective and descriptive-analytical based on the implementation method. Based on the research literature, four criteria (physical-spatial, access, socio-economic, micro-design) and 22 indicators were selected. In the next step, by distributing 392 questionnaires among the citizens as a simple random sampling, using Shannon's entropy method, the importance coefficient of study criteria and indicators and their weighted scores were obtained in two phases. The results show that in general, the level of satisfaction of the citizens with the pedestrian zone is average, and the micro-criterion of the design and three indicators are "suitable design for the disabled and the elderly", "lighting at night" and "proper placement of trash cans, drinking fountains, etc." They are of great importance and have the greatest impact on the quality of the pedestrian zone. These factors are more satisfactory in the first phase compared to the second phase of the pedestrian zone. In general, from the point of view of the citizens, the first phase of the pedestrian zone with a normalization score (0.52) is more favorable than the second phase (0.47). These results can be effective in the success of urban management to build desirable pedestrian zones. If more attention is paid to the design factor of these spaces.
Hosein Panahi; parviz Mohammadzadeh; Akbari Akbari
Volume 18, Issue 50 , February 2015, , Pages 29-53
Abstract
Using integrated data and Heckman two-stage approach, this study investigates the relationship between energy demand (including electricity, petrol and natural gas) and transportation (annual consumption of gasoline by cars owners) with environmental pollution. To do so, the cost-income data for approximately ...
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Using integrated data and Heckman two-stage approach, this study investigates the relationship between energy demand (including electricity, petrol and natural gas) and transportation (annual consumption of gasoline by cars owners) with environmental pollution. To do so, the cost-income data for approximately 14000 urban households is used over the year 2009. Following estimating the demand function of energy and transportation, we have estimated the coefficients of pollution emissions originated from consumption of electricity, gas and gasoline. Then we calculated the pollution emission of these three energy careers. The results indicate that income has a positive and significant effect on consumption in all three types of energy. The results also show that the highest rate of carbon dioxide emissions associated with the electricity, and gasoline has the lowest rate of carbon dioxide diffusion. Estimating the dioxide emission in all three types of energy in Iran’s states indicates that the highest rate of CO2 diffusion belongs to Tehran Province. In contrast the three provinces named Kohgiluyeh & Boyorahmad, North Khorasan and Ilam have the lowest rate of carbon dioxide emission.
Rural Planning
Ali Azar; ghorban Mahboubi; Mahsa Salahi Ranbari
Abstract
Introduction One of the emerging phenomena of modern urbanization that has had a significant impact on various problems in metropolitan areas is the reverse migration from urban to villages locating in the suburbs of the cities. The continuation of reverse migration has reduced life quality and ...
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Introduction One of the emerging phenomena of modern urbanization that has had a significant impact on various problems in metropolitan areas is the reverse migration from urban to villages locating in the suburbs of the cities. The continuation of reverse migration has reduced life quality and doubled the pressure on the rural environment. The rapid physical growth of Tabriz (called Urban Creep) has caused the uncontrollable development of rural settlements and has created a kind of new marginalization. Currently, the growth and development rate in the villages connecting to Tabriz is very high, so that the area of these villages has multiplied in recent years, and their population is several times more than that of Tabriz city. It should be noted that the average national growth rate is increasing. However, many of the areas built in these villages are outside the legal boundaries. Due to the lack of a local urban plan, illegal constructions and marginalization in these villages occur with an upward trend. If the trend of reverse migration in these areas continues, a turbulent and organic fabric will emerge in the next few years. Data and Method This study aims to determine the effect of various factors on migration from Tabriz to the surrounding villages and explain the rapid development of these villages. A descriptive-analytical research method has been used in the study. The documentary-library tools and field studies, including questionnaire, was used to collect the information. The statistical population of this study includes the migrants returned from Tabriz to the seven studied villages. In the new comprehensive plan of Tabriz, the villages of Anakhaton, Alvar Olia, Kojovar, Sahlan, Oghli, Khilijan, Konduro (Kondrud), which were previously outside the city limits, have entered the city limits. Subsequently, the research questionnaires were completed from the seven villages connecting to Tabriz city. The components of reverse migration are physical, socio-cultural, economic, and environmental factors, of which 114 were selected using the convenience sampling method. Cronbach's alpha coefficient was used to determine the reliability of the questionnaires, and the obtained mean reliability was 0.7. Results and Discussion The average growth of the country's rural population during the last ten years (2006-2016) was 69.0%, while it was +43.83% for the studied villages in this period. This growth indicates that rapid physical development has increased in recent years in the villages surrounding Tabriz due to the high cost of land and housing in the Tabriz. The population of the studied villages in 2006 was 25892 people, which has increased to 37249 people in 2016. Furthermore, the area of other villages in 2006 was 284.61 hectares, which has increased to 552 hectares in 2016 and have grown 93.94%. Conclusion Based on the field studies and the data analysis results, in terms of population growth and population attraction, the highest population growth was related to Anakhaton village. According to the factor analysis model, twelve factors were involved in reverse migration to the villages connecting to Tabriz. In the economic and housing factor, the high cost of living in the city with a correlation coefficient of 0.731; in the ecological factor, healthy drinking water with a correlation coefficient of 0.813; in the recreational-tourism factor, the natural tourism spaces with correlation coefficient 0.8; in the entrepreneurship and employment factor, establishment of an industrial workshop in the village with a correlation coefficient of 0.705; in uniformity of social class factor, matching the village with the social class with a correlation coefficient of 0.739; in the urban pollution factor, pollution of the cities with correlation coefficient of 0.820; in village enthusiasm factor; the existence of a happy rural life with a correlation coefficient of 0.774; in the job opportunities factor, the job potentials with correlation coefficient of 0.827; in the security and spatial affiliation, the village security with a correlation coefficient of 0.715; in the high density of the city, urban population density with a correlation coefficient of 0.704; in the cultural-behavioral factors and government support, the factor of government support from the villagers in the form of equity shares and subsidies with a correlation coefficient of 0.858 were the most important variables in reverse migration from Tabriz to the connected villages. Moreover, according to the factor analysis model, the economic and housing factor (Eigenvalue=9.61) determined more than twenty-six percent of reverse migration variance and was the most important reason for the reverse migration to the surrounding villages of Tabriz. The high cost of living in the city, low income, high land prices in the city, low purchase and rental prices in the village were among the economic factors affecting the reverse migration.
Urban Planning
isa piri; Akbar Hossin Zade; Samira Moradi
Volume 22, Issue 64 , September 2018, , Pages 35-57
Abstract
The situation of hospitals, especially in comparison to other urban and street network from one side of and population density on the other hand of urban residents has an important role in the physical and psychological comfort. In addition, hospitals can to determine radius of performance and jurisdiction ...
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The situation of hospitals, especially in comparison to other urban and street network from one side of and population density on the other hand of urban residents has an important role in the physical and psychological comfort. In addition, hospitals can to determine radius of performance and jurisdiction to determine the optimal location for this function to be effective. This research aims to evaluate the location of the existing hospitals in the city is the best place to deploy them. The research method is descriptive-analytic. To collect the required data from field studies used. For collecting required information and data is used field studies and According to information obtained, To review the study area in terms of access to communication road, green space, away from industrial centers, military, and the fault, as well as for weighting the criteria, is used the AHP model. Then, using a decision model of TOPSIS in GIS software, valuation of criteria in the study area and mapping in accordance with the selection criteria, finally The Intersect map of the standards that represent the best place for construction of the hospital in this range are extracted. The results of integrating layers, Land area suitable for the area for service users – treatment Classified in seven categories which finally lands a great right and good for the construction of health centers were identified. Analytic Hierarchy Process Model AHP with GIS can be used as effective tool in site selection of hospitals.
Rural Planning
Mohsen Aghayari Hir; Mohammad Zaheri; Hossein Karimzadeh; reza talebifard
Abstract
Introduction Sustainable rural development based on information and communication technology can be realized as the enjoyment and use of ICT in the area of public services’ support, general management, and interaction between the planners and the rural community and it has to cause contingent participation ...
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Introduction Sustainable rural development based on information and communication technology can be realized as the enjoyment and use of ICT in the area of public services’ support, general management, and interaction between the planners and the rural community and it has to cause contingent participation of the villagers in the decision-makings, improvement of the social and economic development in the villages and protection of the natural resources for the future generations. On the other hand, the existence of spatial inequality in the enjoyment of the ICT-based facilities and services can cause diversion and imbalance in the development amongst the rural regions. In this regard and based on the investigations, it seems that Iran’s rural regions hence Jiroft County do not enjoy a so much optimal situation in terms of the ICT-based sustainable development indices despite possession of abilities like high populational potentials and agricultural economy. Therefore, the present study intends to adopt a novel approach towards ICT-based sustainable development concept for elaborating and valuating its indices in line with planning and achieving sustainable development; to do so, the position and the levels of rural region’s enjoyment in Jiroft County will be assessed and evaluated in terms of the distribution of the ICT-based sustainable development indices and an answer will be found to the following question: How is the status of the villages in Jiroft County in terms of the ICT-based sustainable development level? Data and Method The present study is applied research in terms of the objectives and it is descriptive-analytical research in terms of nature and method. For collecting the information and data, use has been made of the documentary and field methods. The study area of the present research includes the rural regions in Jiroft County. For selecting the sample volume from the study population, two sets of villages, one with and another without ICT centers, were taken into consideration. In sum, 19 villages were found having ICT centers in Jiroft County until 2016; efforts were also made to select another group of the villages by considering several important indices (number of households, the village’s distance to the center of the county, and the village’s elevation from sea level) and some conditions similar or in contrast to those of the villages from the first set. In a match with the total number of the sample villages’ households, i.e. 16170 households, the study sample volume of this group was selected equal to 376 households based on Cochran Formula and the share of the questioned cases was determined in proportion to the number of households in every village. After confirming the validity of the study’s operationalized framework, some elites’ ideas were gathered for determining the weight of the indices in proportion to the conditions of the country’s rural society. Next, COPRAS multiscale decision-making model was employed for analyzing the data and rating Jiroft County’s rural regions in terms of the ICT-based sustainable development. In the end, use was made of K-cluster analysis in SPSS Software’s environment for determining the homogeneous regions and, after determining the level of development in the studied villages, the weights obtained for every village were added within the format of a field to the layer of villages in ArcGIS Software and the results were offered in the form of a map. Results and Discussion In line with achieving the study’s objective and assessing the level of ICT-based sustainable development in Jiroft County’s rural regions, 17 indices were applied. The items related to each of the indices were measured in Likert’s scale and the mean of every index was considered according to the idea of the sample households in every village as a basis for the formation of a matrix indicating the status quo of the ICT-based sustainable development level and rating of the studied villages. In the second step and after the formation of the status quo matrix and to normalize the existent status quo matrix, the indices’ weight determination had to be seminally done. Based thereon, electronic instruction in the social aspect, electronic marketing in the economic aspect, and electronic risk management in the bioenvironmental aspect were found with the highest weights. Then, after finishing the calculational stages of the COPRAS decision-making model, the villages were rated based on Qj’s amount; this way, the villages with the highest amounts of Qj and Nj were found in the highest ranks of ICT-based sustainable development and, on the contrary, the villages with the lowest Qj, were found in the lowest development ranks. Moreover, use was made in this part of Nj for performing K-cluster analysis based on which the studied villages were categorized into five clusters in terms of ICT-based sustainable development level. Therefore, considering the results of the cluster analysis, it can be stated that 8 villages fall in the cluster “developed”, 11 villages in the “relatively developed” cluster, 6 villages in the cluster “intermediate (normal) development”, 8 villages in the “relatively deprived” cluster and, finally, 5 villages in the “deprived” cluster in terms of the ICT-based sustainable development. Conclusion The study results indicated that the rural regions of Jiroft County enjoy a different situation in terms of ICT-based development. Based on the study’s investigations and observations, it can be stated that villages like Dwolatabad Esfandagheh, Dowlatabad Markazi, Daryacheh, Doboneh, Poshtlor, Hosseinabad Dehdar, Ferdows and Saghdar that have the highest development levels under the current conditions enjoy auspicious environmental and spatial states like good position on the plain, high groundwater levels, suitable soil, closeness to the city center and appropriate connective routes and they have also accommodated more population. The aforesaid villages also have better situations regarding cases like ICT infrastructures and equipment, trained human workforce, and services offered in the area of ICT. In opposite, villages named Abshour, Kohan, Hishinsofla, Darrehroud, and Abbasabad that enjoy the lowest level of ICT-based development from the perspective of the study sample volume are small and distant villages usually located in mountainous regions and often with unstable populations. Weakness in access to ICT-based equipment, facilities, and services, as well, in the aforementioned villages is an evident phenomenon. The collection of these conditions have caused the witnessing of different levels of ICT-based sustainable rural development in the rural regions of Jiroft County. The collection of the indices offered in this research can be utilized as a pattern for analyzing the level of ICT-based sustainable development in the other rural regions; additionally, this collection can assist the rural development planners in offering development programs and policies.
Alireza Ildoromi; Habibeh Rouzbahani
Volume 18, Issue 48 , June 2014, , Pages 37-60
Abstract
Mass movement is one of the natural hazards with regard to frequency of which and its strength there are two consequences direct (blocking the rads and the direction of waterways, burring the residential areas and service installations) and indirect consequences (environmental unpleasant effects, making ...
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Mass movement is one of the natural hazards with regard to frequency of which and its strength there are two consequences direct (blocking the rads and the direction of waterways, burring the residential areas and service installations) and indirect consequences (environmental unpleasant effects, making the soil useless, increasing the sedimentaion and decreasing the capacity of dams). The present research was carried out on Kalan dam watershed in Malayer to distinguish the effective factors in the mass movement and recognize prepared areas for mass movement and appointing the weight which states the standard role of these factors in mass movement occurrence. Factors such as lithology, space of faullts, slope, altitudinal surfaces and rainfall are chosen as the most effective factors in the mass movement occurrence. By using geological maps, topography and aerial photos in the from of geographical information system (GIS) and ArcGIS software, we used LNRF model in the maps in the numerical and stratum from for analyzing the obtained data through studying the effective variances as the research conceptive tools. We finally prepared the zoning map of the mass movement danger by combining various strata (layers) through weighting to the effective factors and their algebraic conclusion and the results show that the LNRF model is a good competence to study the data and zoning of mass movement in Kalan dam basin.
