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Showing 708 results for Type of Study: Research

Dr Sara Karami, Dr Nasim Hossein Hamzeh, Dr Abbas Ranjbar,
Volume 24, Issue 74 (9-2024)
Abstract

Today, dust storms affect the lives of many people around the world and cause a lot of financial and human losses. Every year, Iran is affected by dust storms caused by internal sources and external dust sources located in neighboring countries. Semnan province has several dust-producing sources due to its geographical location, that affect not only this province, but also the neighboring provinces. The purpose of this study is to investigate the dust phenomenon of Semnan province and its monthly changes in the 15-year period, between 2003 and 2017. For this purpose, meteorological stations data of the province and the aerosol optical depth of satellite product have been investigated. Also, GOCART model has been used to estimate the amount of dust emissions from this region and to determine the vertical dust flux in Semnan province. The study of average dust flux showed that the highest values ​​of dust flux was in the southeast of Shahroud and then in the south of Shahroud, Damghan and Sorkheh. A monthly investigation showed that in all months, the average AOD in the southern half of Semnan province was higher than in the northern half. The highest levels of AOD were in May, April and June, and the highest amounts of dust flux were observed in March, June and July. Also, the prevailing wind direction was northeast and northeast, and this factor causes dust particles rising from this region and dust loading in the south of Semnan province and areas of Isfahan, Yazd and South Khorasan provinces.
Mohammad Kazemi Garajeh, Behnam Salmani, Mohammad Hossein Rezaei Moghaddam,
Volume 24, Issue 74 (9-2024)
Abstract

The purpose of the present study is to assess the land surface temperature in relation to landuse for the city of Tabriz using remote sensing technology and GIS. Landsat 8 satellite image was used to map the land surface temperature for the study area. Atmospheric correction was applied to the desired image using the FLAASH method and the land surface temperature was estimated using the split-window algorithm for the study area with an accuracy of 1.51 degrees. Landuse map of Tabriz city in 6 classes was obtained using the object-based approach in eCognition software with an accuracy of 90/03. The results of studying the relationship between land surface temperature and landuse indicate that agricultural lands with a temperature of 18.22 °C have the highest land surface temperature. Also, water areas (rivers) have the lowest (10.30 °C) land surface temperature, because of their radiant power close to one. The research results also indicate that the split-window algorithm provides reliable results for land surface temperature estimation that can be used in environmental studies and earth sciences.

Mehrdad Mohamadpour Shatery, Hoshang Taghizadeh, Sahar Khoshfetrat,
Volume 24, Issue 74 (9-2024)
Abstract

The phenomenon of poverty is a social, economic, cultural, and political reality that has long been one of the greatest human problems. The purpose of this study was to identify the factors affecting poverty and examine the internal relations and its leveling with an interpretive structural approach in the Imam Khomeini Relief Committee of Tabriz. In this regard, based on the factors extracted from literature, a questionnaire has been developed. In this phase, 41 indicators have been selected as the most important indicators affecting poverty at Imam Khomeini Relief Committee of Tabriz city. After obtaining appropriate validity and reliability for the questionnaire, it has been distributed among the statistical sample. After distributing the questionnaire, factor analysis was used to analyze the information and reduce the variables to dimensions. The results of factor analysis showed that about 68.3% of the total variance of variables was explained by 14 factors and about 31.7% of the variance was explained by other variables that were not measured. As a result, 14 factors have been identified as the most important factors affecting poverty. These 14 factors are important in order of importance: 1- Economic; 2- Social; 3- Individual; 4- Legal; 5- Family; 6; Environment; 7; Political; 8; Management; 9; Cultural; 10- Overseas; 11. Security; 12. Scientific; 13. Organizational; 14. Geographical. Finally, the interrelationships between factors and the leveling of poverty-related factors have been examined by presenting an extended structural-comparative model (ISM).

Dr Nafiseh Varkianipoor, Dr Seyed Mohammadreza Hoseini, Dr Rohalla Samiee, Dr Majid Ashrafi,
Volume 24, Issue 74 (9-2024)
Abstract

Women play an important role in promoting employment and improving the economic situation of society. Therefore, giving them identity and independence and providing the ground for their active participation in various economic and social affairs, especially entrepreneurial activities in urban areas is a very important factor of this great force.
The experts’ demographic features are analyzed. Then the components of entrepreneurship value chain and social sustainable development are sifted out using experts’ opinions (twenty of the best women entrepreneur of Golestan province), Fuzzy Delphi method, and De-fuzzy to find the components of intended variables. Validity and reliability of questionnaires are investigated by Cronbach’s Alpha and normal distribution of components and statistical samples are also analyzed by Kolmogorov-Smirnov and Student’s t-Test. In section one, the prioritization and ranking of dimensions and components of entrepreneurship value chain are addressed (by 198 of women entrepreneur of Golestan province) by using hierarchical analysis process method and Expertchoice software. In section two, to measure the relationships between the developing women’s entrepreneurship according to value chain and the social sustainable development, the Correlational research, the Structural equation for factor analysis test, and Smart pls2 software are used that show a statistical significant. In correlational research not only the relationship between variables are detected but also the type and rate of variables relationship are reachable. The results then are discussed. And the model of developing women’s entrepreneurship according to value chain with the approach of social sustainable development is presented. The model helps adjust the developing women’s entrepreneurship and show the strength and weakness.
Leyla Meshkani, Jamile Tavakolinia, Mohamad Taghi Razavian,
Volume 24, Issue 74 (9-2024)
Abstract

Landscapes cannot be explained only by obscure geographical frequencies that can be described by objective methods, but they are real subjective observations and experiences that can be inferred by artistic and aesthetic perception, analysis and comparison. Thus, recognizing the elements of the emergence, formation and development of any perspective can be considered as a mirror of the whole picture of human knowledge, culture and perceptions in geography. It is based on such an understanding that the present study attempts to combine qualitative content analysis techniques and soft operations based on interpretive philosophy with a qualitative approach to the question of why each geographical (urban) landscape emerges. Thus, by analyzing the content of printed resources in this field, 14 categories were extracted, and the experts answered the questions related to the role of each category by using the evaluation questionnaire. Finally, after collecting the questionnaires from 10 geography experts, with the help of Fuzzy DEMATEL technique, the existing relationships between categories were analyzed and finally, due to the defect and inability of this technique in leveling, the effective levels between categories were determined by ISM technique. In the meantime, the results indicated that the worldview category, which in the general sense includes religious and ideological concept, is considered as an independent variable of the geographical landscape system. At other levels, there is civic awareness, philosophical thought, and political thought, which serve as the basis for the geographical landscape. In this context, the perspective variables of context, governance, cultural dimensions, and social context are defined as the moderating variables of the geographical landscape system. From the set interaction of variables mentioned, such as the organization of living space, reading of living space, public and private agreement and social resilience are obtained.
Zahra Heidari, Asadolah Heqazi, Shahram Rostaei, Siros Fakhri,
Volume 24, Issue 74 (9-2024)
Abstract

Given Iran's ongoing role in the Middle East and the constant threat of external threats, it is imperative that I take action on the critical and important steps of my country Of the measures that can prevent the occurrence of malignancies , Kermanshah region due to its geographical location and proximity to Iraq as well as its complex morphology include high mountainous lands, relatively wide valleys and plains, geological structural diversity and With the immediate approach, Identify these natural features It creates the right places With passive defense approach To establish these centers. In this research, the research tools are surveyed topographic maps, geology and satellite and aerial images of the area as well as interviews with experts identifying the effective factors in locating critical and important centers with emphasis on passive defense..And after identifying them using AHP (Multi Criteria Decision Making Models) in order to compare the criteria has been analyzed. Also according to the final map based on geomorphological factors in ARC- GIS software environment The area of optimum area for the location of critical and sensitive areas in the northern part is greater than the soothe In other words, the geomorphologic features of the region in the northern and eastern parts of the region are more favorable than those in the western and southern regions for the optimal location of sensitive and important sites.
Mana Taheri, Mohammad Saied Izadi, Hamid Majedi, Zahra Sadat Saeedeh Zarabadi,
Volume 24, Issue 74 (9-2024)
Abstract

According to the fact that place identity is influenced by various social, physical, semantic, functional, and natural factors, each of these dimensions has multiple indicators with complex internal relationships; Measuring and evaluating it is a fundamental and complex issue. Therefore, the aim of this study is to "provide a combined model for measuring the identity of place in urban spaces." To achieve this goal, quantitative methods have been used. First, the expert questionnaire with a sample size of 19 people was analyzed in the form of a combination of DEMATEL model and Analytical network process, then the questionnaire of space users with a volume of 384 samples in 12 urban spaces was analyzed by TOPSIS model. The results show that despite the decline in identity in recent decades, Tehran Bazaar as the central core of Tehran's historical district still has an acceptable level, but the further away from the Bazaar, the different dimensions of social, physical, functional, natural and the semantic identity is declining. Also, from a methodological point of view, it can be said that the combined DANP-TOPSIS model is a suitable model for measuring the various dimensions of place identity in an integrated way.
 
Maryam Aghaie, Siamak Dokhani, Ebrahim Omidvar,
Volume 24, Issue 74 (9-2024)
Abstract

Rain water harvesting is an appropriate option for storing surface runoff for subsequent uses during periods with limited access to water. The most important step in the application of rainwater harvesting systems (RWH) is the site selection suitable areas. Therefore, by identifying suitable sites for this purpose, time and cost will be saved . In this research, multivariate regression model and GIS were used to site selection in situ (RWH) in Tajare watershed. For this purpose, layers such as crown cover, litter, rock and stones, soil, curve number, rainfall, slope and depth of field as independent variable and infiltration were considered as the dependent variable. Then, according to the maps, their values were calculated in average for each of the 27 sub-basins. Also, to investigate the relationship between these variables and weighting, each of the effective layers of multi-variable regression was used by the stepwise method The results showed that the linear multivariate regression model with an explanation coefficient of 0.993 was able to estimate the penetration factor values well In terms of grade of importance, the curve number variables with a coefficient of -2.433, depth of soil with a coefficient of 0.3488, and rubble and gravel percent with a coefficient of 0.057, were the most important, and other factors were not significant. Comparison of the map from the site selection of multivariate regression in this research with some recommended criteria of various research studies showed that the predicted classes with good in the central parts of the basin and very good in the upstream areas of the basin which in the eastern and southeastern part of the basin fit have a good overlap with the recommended areas with these criteria.

Amin Ghahramani Tolabi, Sayed Ali Nouri,
Volume 24, Issue 74 (9-2024)
Abstract

Baths are among the public buildings whose shape and architecture have changed during different historical periods. Due to the importance of these valuable buildings. Kermanshah is one of the cities that during the historical period, especially in the Qajar period, due to its location on the path of Atbat-e-Aliat, was considered by the rulers of the time and has many textures and examples of historical baths. Therefore, the present study seeks to identify the types of historical baths in Kermanshah province with emphasis on the location. To achieve this, it is necessary to study the factors affecting the formation, location in urban, rural and neighborhood contexts, spatial geometry of Kermanshah baths. The research method in this research is a descriptive-analytical method based on field studies, analysis of the location, structure, architecture, decorations, proportions and materials of 12 samples of baths in Kermanshah province and a comparative-historical study of the samples. The results of this study show that Kermanshah province baths in terms of location are divided into 6 types: baths in the bazaar, single baths in neighborhoods, twin baths in neighborhoods, baths as an element of a complex in neighborhoods, baths in houses and baths They are divided in the rural context. The geometry of Kermanshah bath spaces is a function of the location in the city or village. Communication spaces and corridors in neighborhood and market-affiliated baths are based on the big measure, but in private baths and in-house baths and rural baths are based on the small measure. The main spaces of urban baths are decorated with limestone, but rural baths do not have limestone decorations. All the baths studied have 3 main spaces: Bine, garmkhaneh and khazineh, and the area of ​​the garmkhaneh space is relatively larger and larger than Bine, space.

Mr Shokrollah Kiani, Mr Ahmad Mazidi, Mr Seyed Zein Al-Abedin Hosseini,
Volume 24, Issue 74 (9-2024)
Abstract

Subsidence is an environmental phenomenon caused by the gradual subsidence or sudden subsidence of the earthchr('39')s surface. The phenomenon of subsidence in residential, industrial and agricultural areas can cause catastrophic damage. In most parts of Iran, there is a high correlation between land subsidence and the decrease of groundwater level and consequently the density of soil layers. In this study, using two time series of radar images with artificial apertures from Sentinel sensors belonging to 2014 and 2019, the amount of subsidence in Damaneh plain (Frieden city) was calculated. Wells were studied in the period 2014 to 2019, the results of the study of the correlation between land subsidence with changes in groundwater level at the level of 95% was significant. In the continuation of the research, using the logistic regression model, the subsidence trend in the study area was predicted and a subsidence probability map was prepared and created as a dependent variable for the logistic regression model. The independent variables used included altitude, slope, slope direction, geology, distance from the road, distance from the river, land use, distance from the village, groundwater level, piezometric wells. The output of the model is subsidence risk zoning map which was created in five classes. The accuracy and validation of the logistic regression model was evaluated using the system performance characteristic curve and the accuracy (0.89) was obtained. The good accuracy of the logistic regression model in producing the probability map Subsidence is in the study area. In the output of the model, it was found that the area of ​​1980 hectares, equivalent to 7.9%, has a very severe subsidence that has put the situation in a dangerous situation and the need for control and management to reduce this destructive effect.
Hajar Jahanshahi, Hamidreza Varesi, Masoud Taghavei,
Volume 24, Issue 74 (9-2024)
Abstract

In fact, the growth of urban consciousness is a wise strategy to drive urban development and control dispersion and drive urban growth toward sustainability. The purpose of this study was to evaluate the rate of Bushehr city area in terms of growth indices. In this regard, this research is a goal-oriented, applied-developmental one, and a combination of documentary, analytical, causal and survey methods. Reliability of the research instrument based on Cronbach's alpha coefficient of the research was 0.749 which is higher than 0.7 and is appropriate. The statistical population of the study is Bushehr inhabitants which according to Cochran formula is estimated 384 samples. According to the statistical population, the questionnaire was distributed randomly among the citizens. In order to compare between two regions, T-test with two independent samples was used for evaluation of urban smart growth in District 1 and 2 of Bushehr. In this test, the first option to be considered is the significance level while the significance level or sig between the two regions is less than 0.05 indicates a significant difference between the two regions and vice versa. Significance level analysis (0.000) shows that there is a significant difference between the two regions in terms of urban smart growth. Meanwhile, the mean of Region 1 with 3.21 was higher than that of Region 2 with 2.86. Although there is a significant difference in Bushehr region in terms of smart growth indices, this difference is not significant and in general Bushehr regions are not in a good position in terms of smart growth indices.

Dana Rahimi, Javad Khoshhal Dastjerdi, Dariush Rahimi,
Volume 24, Issue 74 (9-2024)
Abstract

Among natural disasters, floods have the highest human toll. The economic impacts of floods are greater in developing countries, including Iran, and are particularly severe in the colder months of the year in the west of the country. The purpose of the present study is to analyze the most severe historical synoptic floods that occurred in Karkheh Basin  (1 April, 2019). Descriptive - analytical research method and its environmental approach into circulation. Analysis of synoptic systems of large floods such as the April 12, 2019 floods show that Western Europe's high-pressure systems, Black sea, East of the Caspian and low pressure north of the Red Sea, Eastern Mediterranean in harmony with the high-rise systems of Western Europe, Low Mediterranean East with a temperature drop of about 50 degrees Celsius(The temperature at sea level In the eastern Mediterranean and Red Sea about 25 degrees Celsius and in the middle of the atmosphere -25 degrees Celsius) also the climb Humidity from the Arabian Sea, North Indian Ocean, Red Sea, Oman Sea and Persian Gulf and Along with Mid-width cold air loss On the area and the establishment of the Polar jet stream) Core up to 70 m(And the establishment of the front jet stream And positive rotation area On the area shows the structure of the synoptic systems causing the flood in the area.
Mrs Mahnaz Saber, Dr Bromand Salahi, Dr Abbas Mofidi,
Volume 24, Issue 74 (9-2024)
Abstract

In this study, the spatiotemporal variations of evapotranspiration (ET) were investigated in the southern part of the Aras River catchment. For this purpose, the ET networked data of FLDAS Noah model with horizontal resolution of 0.1 * 0.1 degree were used for a period of 38 years (2019-1982). After validating the data, the average annual ET values ​​for the region were determined first. Then the monthly and seasonal distribution of the parameter were analyzed spatially. Subsequently, ET variations and anomalies were evaluated year to year. Also, the spatial distribution of the occurrence frequency of ET was investigated by considering the absolute thresholds of 50, 80, 100 and 120 mm for the Aras basin. The results show that the annual ET in the east of the basin is higher than the west of the basin. In the seasonal scale, spring and summer have the highest ET values, respectively. In the monthly scale, Mayو June, April and March had the highest ET values, respectively. In contrast, the autumn and winter months have the lowest average ET values. Also, the whole basin during the study period has experienced three distinct periods of ET changes that in the eastern and western parts of the basin, despite the same behavior in the second and third periods, a significant difference was observed in the first period. The results also indicate the existence of positive anomalies after 2002 in the whole basin, the highest values ​​occurred in 2018 in the west of the basin. The study of the frequency of occurrence of absolute ET thresholds on the basin shows the high frequency of ET occurrence at all thresholds in the east of the basin. A study of nearly 4 decades of ET values ​​in the Aras River Basin shows an increase in ET values ​​over the last two decades over the entire basin, which can be attributed to the occurrence of global warming.

Arsalan Karimi Khiavi, Siamak Panahi, Shahab Kariminia,
Volume 24, Issue 74 (9-2024)
Abstract

The science of urban planning, like other sciences, has been influenced by different intellectual currents. The origins of Folding urbanism, which owes much to philosophy in rhizome, based on Leipnitz mathematics, emerged in architecture by Peter Eisenman, which today survives on an urban scale with postmodern feminist literature as anti-Oedipus and anti-Freudian. Gives. Folding urban planning can be studied in three levels of geography, landscape and city. In this research, landscape and city levels are discussed. Objective: In this research, the evolution of folding is based on Foucault genealogy, which deals with the holes of history and power relations. In the field of urban planning of these relations, the ontology of urban topology layers according to Riemannian equations and Deleuze philosophy in the works of architects such as Peter Eisenman, Zaha Hadid, Eric Owen Moss, Charles Jenks, James Wines.  The research method in this paper is descriptive-analytical with a combination of inductive and deductive. The process of this research has reached the conclusion that Folding urbanism is based on Mendelbrot fractal geometry, Lotfizadeh fuzzy logic and in Lawrence chaos atmosphere and power relations in the glory of feminism and its manifestation on urbanism are the main reasons for the formation. Urbanization is a folding. Results: Similar theories used in folding architecture, rhizome, anti-Oedipus, Mobius, hermeneutic cycle, theories have been formed that are closely related to Gestalt psychology and the phenomenological view that is hidden in the philosophy of unity in plurality. In these theories, the component is folded in its entirety. The skyline, the accesses, the views and all the architectural reserves form a whole unit. Theories related to folding urban planning such as small-scale urban carpets in urban furniture have not been successful, but in single buildings have provided the desired philosophies and have been somewhat successful, and on a large scale in the city well phenomenology, unity in plurality , Contains rhizomes, anti-Oedipus and all the issues raised within it.

Hamid Bagheri, Rahime Rostami,
Volume 24, Issue 74 (9-2024)
Abstract

Wetland cover classification is of special importance in order to identify the type of plant species inside the wetland and also to distinguish it from the wetland margin vegetation and to study their ecosystem changes.  Due to the spectral similarity between different plant species of wetlands and plants along the wetlands and agricultural lands, this is faced with problems using multispectral data and hyperspectral data can be very useful in this regard. in this study power of hyperspectral and multispectral sensors in identifying the characteristics of the wetland and the ability of ETM + (2011), Hyperion (2011) and ALI (2011) sensors to study the characteristics of Shadegan wetland during 1390 and different spectral indices with a suitable combination of The satellite imagery bands of these sensors were compared as input to a variety of classification methods including maximum likelihood, minimum distance, neural network and support vector machine. The results showed that the support vector machine and neural network methods with closer classification accuracy of 85% in all three images show closer results to reality. The classification accuracy for all three images was at its highest for the backup vector machine method, with a total accuracy of 95.73 for the Hyperion image, 88.03 for the ALI and 89.34 for the ETM +. Therefore, the characteristics considered for the wetland, in the three images obtained from the SVM algorithm showed that showing the differentiation of wetland vegetation use from irrigated agricultural land use is more ambiguous than other wetland features. Studies have shown that this part is less recognizable in ALI and ETM + images than Hyperion images, or in some areas these parts are not separable from aquaculture land at all, while Hyperion due to having 220 bands and having a higher level of Spectral details have the ability to distinguish between the two classes.

Habibeh Nabi Zadeh, Elham Cheraghi, Seyyed Moein Moosavi Nadoshan,
Volume 24, Issue 74 (9-2024)
Abstract

Considering the factors affecting the conversion of places and destinations to the tourism brand of the prevalence of tourism development in each region. Because these factors play an important role in the conversion of tourism destinations, and on the other hand, the conversion of a destination to its tourism brand is also a factor in developing more tourism in purposes. Considering the importance of this issue, the present study aimed to investigate the factors and stimuli effect on increasing the transformation of urban and rural areas to tourism brand in Guilan province. The present research is in terms of purpose, applied and method of doing it. The data collection tool and the questionnaire and interview information. The statistical population of the research is experts and tourism specialists in Guilan province, using targeted sampling method, 50 experts were selected as samples. To answer the research questions, the binary logistics model and qualitative analysis were used. The results of the research indicate that linear and meaningful communication has existed with the factors and stimuli of the research with the conversion of urban and rural places to the tourism brand. Also, the results showed that among the five factors in question, three factors of diversity of job opportunities, culture and natural assets and local infrastructure have had the most effects on the transformation of urban and rural areas in Guilan province for tourism brand.

- Valiollah Ghasemi Gilvaei, - Afshin Ghorbani Param,
Volume 24, Issue 74 (9-2024)
Abstract

Housing design plays a crucial role in sustainable social development as cities face numerous challenges due to various changes in the physical landscape. Therefore, it is imperative to establish appropriate design indicators for residential towers. This study aims to investigate the design indicators for sustainable social development in residential towers in the metropolis of Tehran. The research method employed is descriptive-analytical and applied in nature. The statistical population for this study consists of architectural experts who are members of the Tehran Organization. According to the Engineering System Organization, the statistical population comprises 22,000 experts and members of the Tehran Engineering System Organization. The sample size was determined to be 384 individuals based on the Morgan table. The results of the Friedman test indicate that designing open spaces for art, culture, games, and entertainment in towers promotes interactions and a sense of belonging, while mitigating the negative effects of industrial life on residents. This aspect was found to have the highest weightage of 17.81. Additionally, the flexibility in tower design and overcoming structural constraints through solutions such as strip design and atrium design, along with facilitating proper access and installation of open spaces, contribute to sustainable development and enhance residents' satisfaction. This indicator obtained a weightage of 17.51. Furthermore, the effective management of towers and the design of suitable social spaces on roofs and ground floors (interactive, sports, cultural, and artistic) have a significant impact on reducing tower-related issues and promoting vitality and public participation. This indicator ranked third with a weightage of 17.42. Consequently, sustainable social development is closely linked to the design of residential towers.

Sayyd Morovat Eftekhari,
Volume 24, Issue 74 (9-2024)
Abstract

One of the consequences of the earthquake can be changes in the elevation levels of the unevenness in the area of occurrence. These changes at the level of the region will not be the same and the amount will be different under the influence of several factors such as: earthquake intensity, landforms, geo-material, and structure geological... The purpose of this research is to measure the geomorphometric changes caused by the earthquake of 17th February 2021 at the level of Dana County using the radar technique differential SAR Interferometry. To achieve this goal, taking into account the appropriate coverage and measurement accuracy of the Sentinel 1 radar satellite images from two image scenes related to the earthquake area for the dates before (2021.02.08) and after the earthquake (2021.02.20) from the organization's website. European Space Agency (ESA) was received, after performing the process and data analysis Differential Synthetic Aperture Radar Interferometry (D-InSAR), it was found that after the earthquake dated 2021,02,17, a part of the studied area was affected by positive elevation changes with a rise of 0.11 cm and Negative changes of -0.6 cm subsidence have been encountered. These positive changes (uplift) are more noticeable near the epicenter of the earthquake in the east of Dena, and the negative changes (subsidence) are quite evident with the Syncline Valley on which Khorasan Rivers is located. And in dealing with the faults, changing the geological structure, geo-material of the region, it has a special irregularity.
Mr Mohammad Reza Salimi Sobhan,, Mrs Zahra Beygom Hejazizadeh , Mrs Fariba Sayadi, Mrs Fatemeh Qaderi,
Volume 24, Issue 75 (12-2024)
Abstract

In examining natural hazards, such as hail, statistical analyzes can play a significant role. Due to the great importance of economic and side losses of hail in the northern part of Zagros with maximum frequency and damage, the necessity of studying its temporal and spatial location is felt very distinctly. Therefore, in order to estimate and estimate the probability of occurrence of this phenomenon, 10 hail data data of 10 synoptic stations of the region were used during the statistical period of 2014- 1992. In choosing the best method for calculating the distribution of precipitation probabilities, different types of probability distributions of discrete random variables were tested by means of both Kolmogorov and Anderson-Darling testsThe results showed that the good Poisson distribution test had a good fit for hail occurrence at a high level of 90.99%. Baneh station with the maximum frequency of hail precipitation has the lowest probability (0.023%) and Pearnshahr station has the most probable days without hail (0.39%). Therefore, the probability of occurrence of hail in Baneh has a higher percentage. In the next round, the negative binomial model satisfies the observations of this type of precipitation well. The calculation of probabilistic distributions by these two methods showed that the probability of occurrence of hail with the frequency of 1 to 6 times and more in the region and the highest probability is related to the frequency of 3 occurrences of 0.20%. At a frequency of 1 to 6 times, the probability of occurrence of this phenomenon is 5 times more than the probability that it will not occur, which indicates the region's high vulnerability to this type of climate risk.

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Ehsan Lashgari Tafreshi,
Volume 24, Issue 75 (12-2024)
Abstract

In the classical view, the political dimension study of space has always been considered as the political geography ontological basic. Gradually from the 1980s with the development of post-positivist perspectives on human geography; Politics affected all social spheres from government and political parties to gender and considered the smallest power relations associated with the political concept. The political issue has rejected the organization of space on the basis of formal logic and has introduced new forms of epistemological reconstruction in the study of the relationship between politics and space. In this article, has been attempted to explain the political epistemological consequences in the study of relationship between politics and space. Research findings indicate that political dimension of space study is needed epistemic relativism in context of the political. In this regard, intersubjective cognition has a special dependence on the historical evolution of space and therefore requires to power factor genealogy. This spatial genealogy is always linked to the conflict that exists in human societies and forms the possibility of space antagonistic cognition. In this regard, the social meaning of geographical space; considered as place of conflict and resistance of marginalized groups and hegemonic forces in society Which reach a kind of adaptive balance within a certain time.  This process is caused, the epistemological model adaptation of cultural geography and political geography with each other.

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