Mahdi Modiri
Volume 23, Issue 89 , May 2014, Pages 2-4
Abstract
Geographic sciences address place and people living in it, how it influences people and how it is influenced by them. Geography is about place in different local, national, regional and global scales. Yet, geographers must know that the relation between people and place is not one-dimensional. This relation ...
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Geographic sciences address place and people living in it, how it influences people and how it is influenced by them. Geography is about place in different local, national, regional and global scales. Yet, geographers must know that the relation between people and place is not one-dimensional. This relation is part of a complex network. People in this network need to decide about different issues with different degree of importance. Geographers can only learn about the consequence of these decision making processes, if they know how they were made and how other elements have influenced this decision. Nowadays, the trend of human activities has imposed a particular situation on the world which in many cases has changed into fundamental challenges facing human life. This article refers shortly to three main challenges facing geographers.
Soheila Irankhah; Mojtaba Ghadiri Masum; Masud Mahdavi
Volume 23, Issue 89 , May 2014, Pages 5-16
Abstract
Rural development is the most sustainable policy and development strategy of every country. This policy is closely related with intellectual and attitude system. There are different tools and methods for the institutionalization of this policy. Issuance of ownership document for residential or rural ...
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Rural development is the most sustainable policy and development strategy of every country. This policy is closely related with intellectual and attitude system. There are different tools and methods for the institutionalization of this policy. Issuance of ownership document for residential or rural real estate along with other developmental policies in rural areas are among these tools and methods. In this regard, second, third and fourth economic, social and cultural development programs introduce rural construction as one of their goals, and regard issuance of ownership documents as an executive solution to reach this goal. Ground is full of buried treasures and wealth, so it is economically valuable and satisfies different needs of human society (including construction works).Therefore, houses and places in rural areas are among capital benefits of rural societies and owners need to feel legal safety in regard to their properties. On the other hand, the need for ground-related information is a basis for development and control of land resources, and it prioritizes issuance of ownership document for each unit (Tarshizian & Athari, 2010). This article seeks to scrutinize different countries’ experiences and performance in issuance of ownership documents for rural residential units and investigates their success rate. To do so, analysis and evaluation were performed in two different geographical points using field and case study, which provided different results.
Sohrab Asgari; Farzaneh Sadeghi; Zahra Khanmohammadi
Volume 23, Issue 89 , May 2014, Pages 17-25
Abstract
The Persian Gulf consists of 8 coastal countries and a water body of 240000 km. Coastal countries do not have the same access to this body of water which has caused some problems with dangerous environmental consequences. Persian Gulf (formerly known as Persian Sea) has specific natural and environmental ...
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The Persian Gulf consists of 8 coastal countries and a water body of 240000 km. Coastal countries do not have the same access to this body of water which has caused some problems with dangerous environmental consequences. Persian Gulf (formerly known as Persian Sea) has specific natural and environmental situations and is thus very different from other seas and water bodies. Because of these differences, United Nation environment office ratified Kuwait convention, so that coastal countries act more sensitively in preserving Persian Gulf environment. In recent decades, Persian Gulf environment has faced many losses and damages due to inappropriate human activities. Because of these devastating activities, the unique ecosystem of this sea is being destroyed. The destructions are quite widespread and includes different activities. Some countries have transformed their sea coasts and thus increased environmental devastation of the sea. The present article has endeavor to investigate Persian Gulf’s natural and environmental situation, while reviewing its position in the United Nation convention on Law of the Sea (1982) analytically and scientifically. It also mentions the coastal countries responsibilities in maintaining this sea.
Abbas Khosravi
Volume 23, Issue 89 , May 2014, Pages 26-31
Abstract
Since the avalanche hazard map is a very time-consuming task, our goal is to improve the development of risk mapping models in vast remote areas. This model is based on satellite imagery and digital elevation model at two points of the Swiss Alps. To simulate avalanche hazards, the model (DEM) is programmed ...
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Since the avalanche hazard map is a very time-consuming task, our goal is to improve the development of risk mapping models in vast remote areas. This model is based on satellite imagery and digital elevation model at two points of the Swiss Alps. To simulate avalanche hazards, the model (DEM) is programmed in a computer that includes the determination of avalanche coordinates and parameters in the forest environment. Forests and pastures were classified according to thematic maps (TM) data. So far only a single forest classification has been made. While separating forests, bushes, and areas near the separating lane (the hypothetical line near which no tree grows) creates problems. The classification of small water springs, and the effect of avalanches within the forest was successful. The comparison of Bahman land and land use maps shows that 85 percent of risk and risk areas are correctly categorized. But for scientific applications, the separation of the red and blue lines was not satisfactory, and more needs to be done for operational applications that need to be addressed. The overall policy is very promising and should be led toward our goals, which is to provide more reliable risk maps with better and newer gateways to mutual conversion of snow and forest.
Mohammad Rauf Heydarifar; Naser Rezaie
Volume 23, Issue 89 , May 2014, Pages 32-42
Abstract
Trend of security issues in Iran’s western borders, including Kermanshah province shows some threats and problems caused by borders’ intrinsic attributes. The present study seeks to present an appropriate study of the geographic-political situation of the province’s borders, help to ...
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Trend of security issues in Iran’s western borders, including Kermanshah province shows some threats and problems caused by borders’ intrinsic attributes. The present study seeks to present an appropriate study of the geographic-political situation of the province’s borders, help to manage present threats and opportunities by a more comprehensive understanding of borders features and facilities, and suggests appropriate solutions to face and neutralize these threats. The study affects our understanding of the province’s borders, helps in gaining a strategic position for the province, and influence Iran-Iraq relations. We hope that this research opens an appropriate and effective way to develop borders and increase our knowledge of Kermanshah province from a geopolitical standpoint (which has not been addressed comprehensively).
Saied Olfati; Khadijeh Moradi
Volume 23, Issue 89 , May 2014, Pages 43-45
Abstract
Gully formation is always accompanied by erosion and land transformation which produce a significant amount of sediment, cause land degradation, destruction of roads and irrigation networks and dam overflow. Climatic situation of the area is one of the most influential elements in formation of gullies. ...
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Gully formation is always accompanied by erosion and land transformation which produce a significant amount of sediment, cause land degradation, destruction of roads and irrigation networks and dam overflow. Climatic situation of the area is one of the most influential elements in formation of gullies. The present article seeks to investigate gully erosion and formation of gullies in Dire basin in Gilan-e gharb which is one of the main agricultural centers of Kermanshah province. In this regard, 5 climatic indicators are applied. These indicators include hydrothermal coefficient, Ws coefficient or the amount of humidity in formations, Sepaskhah model, Arnoldos model, and second model of Fournier. Hydrothermal and Ws coefficients indicate high sensitivity and very high potential in gully formation. Moreover, the other third models which apply climatic factors to estimate the amount of produced sediments indicate that 27.24818 ton erosion has happened across the area. This volume of erosion plays a significant role in gully formation.
Seyyedeh Fatemeh Hoseini; Mohammad Soleymani; Farhad Azizpour; Zahra Porbar
Volume 23, Issue 89 , May 2014, Pages 46-53
Abstract
Annually, earthquake damnify many countries dramatically and damages human communities physically and psychologically. Regarding absolute annual average of people facing earthquake threat, Iran ranks 7th in Asia and 13th in the world. Throughout history, Qiru Karzin city has always faced devastating ...
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Annually, earthquake damnify many countries dramatically and damages human communities physically and psychologically. Regarding absolute annual average of people facing earthquake threat, Iran ranks 7th in Asia and 13th in the world. Throughout history, Qiru Karzin city has always faced devastating earthquakes which have resulted in many losses and damages in rural and urban areas. In this regard, spatial information system can play an influential role in identifying areas facing earthquake hazard, their dispersion, the quality of physical structure in danger and analyzing economic, social and demographic features of the area in danger. The present study seeks to identify secure and unsecure zones and find appropriate locations for crisis management bases in Qiru Karzin. To reach this goal, information received from different criteria is studied and classified into three classes of natural variables, physical variables and institutional-management variables. Then, information layers of different criteria are entered into GIS environment and standardized using Fuzzy linear functions. Later, maps are integrated using Fuzzy Plus. Finally, appropriate and inappropriate zones are identified regarding risk taking and construction of crisis management bases. According to the research results, three villages were selected based on their capability for creating crisis management bases in three levels. These villages will aid rural municipalities (Dehyaris) in the process of crisis management in Qiru Karzin and in reaching goals of crisis management bases using geographic information system capabilities .
Elham Ghasemifar; Somayyeh Naserpoor
Volume 23, Issue 89 , May 2014, Pages 54-60
Abstract
Zoning by climatic elements and factors is one of the most crucial issues which is of interest due to its importance in agriculture and architecture. Climate is the result and function of dominant elements and factors in the area. In this article, zoning is performed based on monthly temperature and ...
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Zoning by climatic elements and factors is one of the most crucial issues which is of interest due to its importance in agriculture and architecture. Climate is the result and function of dominant elements and factors in the area. In this article, zoning is performed based on monthly temperature and precipitation average in 16 synoptic stations of Zagros area using 4 analytical methods - analyzing the main component, seasonal Z-score of temperature and precipitation, standard deviation of monthly and seasonal temperature, and climatic coefficients (De Martonne’s aridity index and Peggy climogram). These selected stations possess the most complete statistics since establishment in 2005. Z score results were verified using variance analysis. In the first 3 methods, zoning was performed using Ward’s method. 3 main components and 5 areas were identified which justify 91.84 percent of variable variances. Z score shows 5 areas in spring and autumn, and 4 areas in summer and winter for rainfall, and 4 areas in summer and 3 areas in other seasons for temperature. Variance analysis test proved the hypothesis (inequality of the areas). 5 main areas were reached based on the temperature data. Applying De Martonne aridity index and Peggy climogram, 3 and 4 areas were verified respectively. Finally, maps of precipitation and temperature areas of Zagros were produced by Inverse Distance Weighted method in GIS environment.
Mohammad Akbari; Khodayar Sepahvand; Mahdi Karimi
Volume 23, Issue 89 , May 2014, Pages 61-66
Abstract
The present article evaluates condition of currents, sedimentation and erosion regime in Kuh-Mobarak coasts. Modelling was performed using MIKE-21 software and the hydrological information received from Geographic Organization of Armed Forces. Moreover, last year’s satellite and aerial imagery ...
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The present article evaluates condition of currents, sedimentation and erosion regime in Kuh-Mobarak coasts. Modelling was performed using MIKE-21 software and the hydrological information received from Geographic Organization of Armed Forces. Moreover, last year’s satellite and aerial imagery of Kuh-Mobarak are used to evaluate changes in the coastline. In sediment transport studies, changes in depth of some northern and southern profiles of Kuh-Mobarak port are evaluated using information related to hydrographical periods. Modelling was performed to understand the hydrodynamic situation and current in the area. Afterwards, the model was validated and calibrated in accordance with field measurements. In the proposed model, dominant current at the beginning of the coastline has a South East- North West direction, while there is a south to north direction at the end of the coatline. Comparing aerial and satellite imageries of different time periods, we can distinguish coastline changes, erosion points, coast sedimentation. Therefore, 1968 and 1995 aerial imagery and 2010 Geoeye satellite images were applied.
Ali Hanafi
Volume 23, Issue 89 , May 2014, Pages 67-71
Abstract
Weathering happens with the breaking and transformation of ground surface stones, due to physical, chemical or biological processes. Wind, water, climate, plant and animal factors can cause weathering. The present study is performed based on Louis Peltier models in which two variables of average temperature ...
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Weathering happens with the breaking and transformation of ground surface stones, due to physical, chemical or biological processes. Wind, water, climate, plant and animal factors can cause weathering. The present study is performed based on Louis Peltier models in which two variables of average temperature and precipitation were used. Applying these two variables, Peltier distinguished 7 models which can describe different forms of weathering. Among these, two models of weathering regimes and morphogenetic regimes were investigated in Iran and related regimes of each station were determined based on the related graphs. To study and investigate weathering and geomorphologic areas across the country, climatic data including average annual precipitation and temperature were collected from 143 stations in Meteorological Organization portal with appropriate data and statistical period. The collected data were registered in a GIS database. After investigating the temperature and precipitation trend of the country, the regime of each station was determined using Peltier models and a weight was assigned to it. Then, they were registered into the mentioned database and related maps were produced in Arcmap. Results indicate that 5 of 9 morphogenetic situations of Peltier models occur in Iran climatic situation, so the central plateau, east and west of the country are mostly located in arid zone. Mountainous areas, Zagros and Alborz elevations have semi-arid regime, and stations located in southern coasts of the Caspian Sea and western hillsides of Zagros have a mild regime. Regarding weathering, areas in the central plateau and southern part of the country have a very low level of weathering, mountainous areas like Zagros and Alborz elevations and North West of the country have a weak level of mechanical weathering. Some stations in Northern Alborz and western hillsides of Zagros have average chemical weathering with frost and in some stations on the southern coasts of the Caspian Sea, severe chemical weathering occur.
Abdollah Seif; Tayyebeh Mahmoodi
Volume 23, Issue 89 , May 2014, Pages 72-80
Abstract
During the last three decades, the process of producing topographic information has observed a development in data producing technology, from traditional and land mapping toward inactive methods of surface measurement and registration (like photogrammetry and remote sensing), and more recently toward ...
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During the last three decades, the process of producing topographic information has observed a development in data producing technology, from traditional and land mapping toward inactive methods of surface measurement and registration (like photogrammetry and remote sensing), and more recently toward active methods (like radar and Lidar). Lidar is a technique used to gather information from the surface which works by measuring distance with laser. Measurement in Lidar is based on this principle: with defined coordinates of the laser sending point, it is possible to measure coordinates of any point on the ground by measuring the oblique distance between pulse sending point and the ground surface and measuring the angle of wave sent between the pulse sending point and ground level. Images produced using Lidar data have a 472*697 pixel dimension. In fact, Lidar is a supplementary tool for collecting 3 dimensional information which aid spatial photogrammetry and remote sensing. The most important information received from this device is the distance between sensor and ground level which is measured by calculating the time period between pulse impact with earth surface and its return to the sensor. Moreover, the distance between ground surface and flying level of the airplane is repeatedly measured which determines ground surface and vegetation. Digital elevation model and digital surface model are products of Lidar. Features like plot parameters, average elevation of trees, surface of vegetation crown, elevation of the vegetation crown, diameter at breast height, single trees and jungle structure can be exploited by Lidar. The present article seeks to introduce Lidar and investigate its functions and applications.
Seyyed Hosein Mir Moosavi; Shahab Shafiei; Zahra Taghizadeh
Volume 23, Issue 89 , May 2014, Pages 81-87
Abstract
Studying the influence of climatic elements on residential environments is an applied subject in meteorology, which has recently received a significant importance in synchronizing buildings and residential environments with dominant climatic situations due to the high costs of energy. The present study ...
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Studying the influence of climatic elements on residential environments is an applied subject in meteorology, which has recently received a significant importance in synchronizing buildings and residential environments with dominant climatic situations due to the high costs of energy. The present study use data collected from different climatic parameters (humidity, minimum temperature, maximum temperature) in an hourly basis. Data was analyzed using Ecotect and One Square software. Moreover, day degree, temperature adaptability index, climatic-environmental situations of the designed building in Mehr-Abad station were investigated. Results indicate that climatic comfort in winter (January, February, and March) and December equals zero. In other words, some of the necessary situations for climatic comfort inside buildings should be achieved using mechanical systems, while others must be achieved by appropriate climatic designing of buildings. Comparing comfort level in and outside of buildings indicates that some of necessary situations for climatic comfort were provided naturally in March. This shows the role of correct designing in reducing the need for mechanical systems. Moreover, temperature adaptability index in different points inside the building indicated 0.94 which shows a completely appropriate situation in the designed building. Finally, Tehran bioclimatic graph was extracted which shows that there is just a 7 percent climatic comfort around the year and Tehran climatic situation is out of comfort range for the other 93 percent of the year.
Marzieh Khanahmadi; Mahdi Arabi; Alireza Vafaienejad; Hani Rezaiean
Volume 23, Issue 89 , May 2014, Pages 88-98
Abstract
Constructing new urban facilities needs a precise investigation on the right method of establishing such facilities in different areas of the city. Selecting an optimal place based on different and sometimes controversial characteristics is the first fundamental issue in correct allocation of urban facilities. ...
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Constructing new urban facilities needs a precise investigation on the right method of establishing such facilities in different areas of the city. Selecting an optimal place based on different and sometimes controversial characteristics is the first fundamental issue in correct allocation of urban facilities. This is especially important if crucial issues like human life are also considered. Thus due to the importance of endangered human lives, optimal selection of fire stations is considered to be crucial. Considering the uncertainty about information sufficiency and comprehensiveness of inferences drawn by tools like spatial information system, fuzzy model is used in combination with analytic hierarchy process. In the beginning step of the study, influential factors in locating fire stations were determined and standard maps were produced and prepared. During the study, a survey performed on the experts opinions indicated that these criteria do not have the same influence in locating stations. Thus, these criteria should be assigned different weights based on their importance and influence. Analytic hierarchy process (AHP) and Export choice software were used to weight these criteria. After collecting expert opinions and in order to avoid possible non-expert opinions, adaptability of the judgments were calculated. After verifying CR values, these weights were used in subsequent steps. In the next step, fuzzy logic was used to rate these layers. Prepared layers were transformed into fuzzy logics using different membership functions which were selected according to experts’ opinion. Finally, AHP and weighted linear combination (WLC) were used to integrate fuzzy criteria with fuzzy membership functions and calculated weights, and in this way appropriate zones for building fire stations were identified and determined. Simply relying on the map results cannot have the necessary efficiency in locating an optimal place for the fire stations. Therefore, standard functional radius of available stations were determined using network analysis in GIS environment. Then, places with a high score for building stations and those covering whole area in a standard time were selected. This research seeks to display the efficiency of applying integrative logic for ranking layers using AHP in GIS environment. The integrated model benefits from high capabilities and it can be applied for different goals (selecting the optimal place for a site) and in different spatial situations.
Parastoo Khosravian Arab; Gholamhosein Rastegarnasab; Zahra Arzjani; Mansooreh Banazadeh
Volume 23, Issue 89 , May 2014, Pages 99-101
Abstract
In the present century, a massive scientific, intellectual and philosophic revolution has happened in our understanding of the universe. Meta space theory introduces new dimensions to the accepted four dimensions of space-time. In fact, according to this theory the world is located in a Meta dimensional ...
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In the present century, a massive scientific, intellectual and philosophic revolution has happened in our understanding of the universe. Meta space theory introduces new dimensions to the accepted four dimensions of space-time. In fact, according to this theory the world is located in a Meta dimensional space. Scientifically, this theory accompanies Kaluza-Klein theory or super gravity. But superstring is its most developed formula, which even predicts the exact number of dimensions. So, six other spatial dimensions are added to the three commonplace dimensions of space (length, width and height) and the one dimension of time. Therefore, the present article seeks to display that science certainly needs higher dimensions to describe hidden layers of natural laws. So that, even known laws of the nature expressed in higher dimensions become surprisingly simpler, symmetrical and more beautiful and nature finds its real position in a geometry with higher dimensions.
Iman Ghalandarian Golekhatmi
Volume 23, Issue 89 , May 2014, Pages 102-105
Abstract
Different elements are involved in user’s transportation choice. Land use is one of these influential elements. The present article investigates the impact of different urban land use factors (like density, local access, street connections, composition of the land uses, pedestrian-center) on traveling ...
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Different elements are involved in user’s transportation choice. Land use is one of these influential elements. The present article investigates the impact of different urban land use factors (like density, local access, street connections, composition of the land uses, pedestrian-center) on traveling behaviors (like using personal car, transportation without car). This information is especially appropriate for evaluating transportation policies and their influences. Policies like intelligent growth, new urbanism and access management help in realizing plans of transportation planning.
Farhad Azizpour; Roghayyeh Shamsi
Volume 23, Issue 89 , May 2014, Pages 106-112
Abstract
Factors of the natural-ecologic, social, economic, historical and political environment affects formation, establishment and organization of rural environments. Thus, the present article seeks to clarify the influence of natural elements (natural-ecologic environments) in transformability of spatial ...
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Factors of the natural-ecologic, social, economic, historical and political environment affects formation, establishment and organization of rural environments. Thus, the present article seeks to clarify the influence of natural elements (natural-ecologic environments) in transformability of spatial organization in 11 rural districts of Lavasan-e Kuchak village. Descriptive-analytic methods and secondary-research methods are used for collecting information. Moreover, models like Gatman institutional measurement, value of centrality, total minimum distance, number of direct links, number of communicative nodes and demographic capacity are also considered. Results indicate that natural elements, especially topography, water resources and slope have influenced the position of rural settlements. This has resulted in the spatial organization of the study area possessing a two-level hierarchical structure. Moreover, based on the results it is suggested to form spatial organization of the area with three rural areas of Afje, Kantiya and Bujan villages and a rural complex of Lavasan city.