Showing 28 results for Ahmadi
Dr Dariush Yarahmadi, Dr Amanolah Fathnia, Mehdi Sherafat,
Volume 20, Issue 56 (3-2020)
Abstract
Abstract
The extention of Snow cover and its spatial and temporal changes considered as a basic parameter in climatic and hydrologic studies. Data from satellite images due to the low cost and the large extention of cover are, effectively help the identifying of the snowy basins. Since the satellites are able to imaging a surface at different times, this will allow snow survey studies to investigate the spatial and temporal distribution of snow. In this research, Snow line changes and the surface temperature line in Alborz Mountains using NOAA-AVHRR satellite images since 2006 from 2015 was studied. The results showed that at the study period, maximum area of snow have been observed in April 2015, with the amount of 12051 square kilometers and the minimum area snow have been observed in June 2008, with the amount of 33 square kilometers. The average of the lowest elevation of snow covered areas, have been observed in April 2007, with the amount of 2662 meters and its highest value have been observed in June 2008 with the amount of 3820 meters. Also the most of the snow line change occurred between the years 2007 to 2008. Moreover, in almost of 15 years, the isoterm of zero degrees Celsius, matches with the snow line and its elevation has changed as the snow area is changed.
Hasan Kamran Dastjerdi, Marjan Badiee Azandehie, Yashar Zaki, Abbas Ahmadi, Narjessadat Hossainy Nasrabady,,
Volume 20, Issue 57 (6-2020)
Abstract
In today's world, the process of globalization and communication and information innovations has brought the "cities" into an actor of national and global competition. No urban point in the world can rely on maintaining its traditional role in the urban hierarchy, as other urban areas compete in a network structure with other cities in order to enhance their position on the network and overcome other competitors. In contemporary cities, forces, activists, and urban actors face a different role in their political, economic, social, and cultural domains, with a view to their modern and highly sensitive interests, and therefore competition between the positive and the negative ones It has emerged or is underway. Given the importance of this, political geographers and geopolitics are studying the important process, which is in fact the "urban geopolitics", created in the wake of urban competition, and with the growing competition of urban action-makers and forwards ahead. , Pay. The present paper uses a descriptive-analytical method to make it clear that urban geopolitics, on the one hand, includes a set of common rivalries, ideas and perceptions of political factions, religious denominations, or other social centers that social groups It brings to the fore and creates a worldview for them. On the other hand, the concept of this survey shows how these perceptions, the field of decision-making by citizens, and the occurrence of competition, change, and sometimes even protests in urban environments. It then changes with inspiration from geopolitical conditions. Hence, a kind of geopolitical measure on a city scale has made cities important actors in diverse geographic areas. The results of this research show that the multi-dimensional phenomenon of the city is studied by political geographers and geopolitics, with emphasis on the pivotal elements of space, politics, power and competition.
Parisa Ahadi, Shahriar Khaledi, Mahmoud Ahmadi,
Volume 21, Issue 60 (3-2021)
Abstract
Dust is referred to sediments of less than 100 microns in size which are transmitted as suspended particles. Dust storms are events which naturally occur in arid and semi-arid areas, especially in subtropical latitudes. One of the most known sources of dust is the west of Asia, including Arabian Peninsula, Syria, Iraq, and Iran, especially Khuzestan Province. The purpose of this study is to investigate the frequency and trend of dust phenomena on hourly, monthly, seasonal and annual scale between 1995 and 2015 in Khuzestan Province. The method in this study is based on statistical computation of dust parameters and also the trend analysis of data based on Mann-Kendall test and spatial distribution maps of dust phenomena. The results suggests that 78.57 percent of dust event are occurred between 9.30 am to 15.30 pm local time, concurrent with peak of sun radiation and earth surface warming, dryness of soil and local pressure difference. The hourly trend analysis is increasing and significant in all hours and the highest increase occurred at 9.30 pm to 12.30 pm.49 percent of dusty days occurred in June, July and May and also 73 percent of them are in spring and summer as following from temperature increase and water and soil resources drying in the province. The seasonal and annual spatial distribution of dust indicates that most of dusty days in all seasons are located in west of province which suggests dominance of external sources as the main source of dust and the importance of topography factor in this area.The Z value spatial analysis suggests high increase of dust event in recent 20 years in southeast, south and central areas of the province and also on last hours of day which demonstrator development of internal sources activities in increasing trend of dust event in recent decades.
Mr Mohammadreza Mirsaeedi, Dr Moslem Seyed Alhossaini, Dr Fereshteh Ahmadi, Dr Amir Hossain Shabani,
Volume 21, Issue 61 (6-2021)
Abstract
Generally speaking the existence of metropolises, alongwith the high various business districts have led to high valume of travels to these centers.The density and separation of these centers brings about the increase and the decrease of the vehicles. The adoption of location determination strategies and that of the comunicational centers and the city activities has made the cities continue the developement process while cosidering the fairly service destribution and the spatial equalities.The goal of this research is the recognition and determination of the city spatial organization working centers and activity model and the relation of service functioning with one another so that the mono central and poly central cities can have a important effect on the destribution system and service centers and the vast changes of the citizens .The analysis method is a kind of quantity and quality one. In the quality part of that the descriptive statistics ( the geometrical presentation , graphical disparation, the centralism measures) and the Hansen Model. In the areas of planning, a great difference is seen in the levels of land uses so that the land use of higher educations in the western metropolitan city of Mashhad area is 84 percent while that of the eastern area is 3 percent. It is the same about the equipped medicinal, commercial and green space areas.Only in the areas of managerial levels there is a relative balance. Finaly the city is devided by three areas throughwhich while considering the employment , the developement potential and distance , the land use determining rate was found out.
Farnaz Izadi, Atefeh Ahmadi, Farzin Charehjoo,
Volume 21, Issue 62 (9-2021)
Abstract
Future study as an emerging knowledge is the evolutionary form of strategic planning. This knowledge has been used purposefully in recent years to meet the uncertainty and complexity of various dimension of issues and to designing the future of systems. In this regard, Kurdistan province in western Iran, despite the potential and actual capabilities, has not achieved the development appropriate with capacities and there are many structural problems in achieving this purpose. In this regard, the present study has examined the problems and challenges of lack of development in Kurdistan province with a descriptive-analytical and future study approach. The method of data collection is a survey and documentary studies. The problems and challenges and their effects on the development of the province have been identified to achieve results based on a semi-structured interview from elites and experts. MIC MAC software, environmental scanning method, and system analysis are used to analyzing the data. The results of the research in assessing the extent and the way of influencing of issues and challenges on each other and on the future status of development in Kurdistan province, respectively in the direct and indirect effectiveness and impressionability, indicates that water crisis, poverty, lack of development of industry, unbalanced tourism and animal husbandry, environmental degradation and lack of access to health services, unemployment, and improper management of water facilities play a major role in the future of development in Kurdistan province
Nafise Marsousi, Majid Akbari, Nazanin Hajipour, Vahid Boustan Ahmadi,
Volume 21, Issue 63 (12-2021)
Abstract
According the increasing population, especially the urban population in the world and increasing environmental pollution caused by it, The need for urban planning and management approaches based on indicators such as Healthy Cities approach seems inevitable. The purpose of this paper is to analyze the efficiency and ranking of healthy city indicators through 36 indicators (socioeconomic, health services, environmental and health care). research method applied research is descriptive, analytic and development. To analyze the data from the non-parametric linear programming technique of data envelopment analysis, cross ineffective, models and software Dea slover Shannon entropy is used. The geographic area of this study is Khuzestan province and its statistical population is 22 cities according to the census of 2016. The results of this research show that in terms of relative efficiency of Ahwaz city due to the centrality of the province and the availability of infrastructure and sanitary services with a relatively high distance with the highest performance and high level of performance was in the first rank. And the cities of Dezful, Shosh, Khorramshahr, Shoshtar, Abadan, Masjed Soleyman and Behbahan were selected as semi-efficient cities. Finally, it can be concluded that in terms of having the indicators of the healthy city, most of the cities of the province are Inefficient (64%).
Mr Mahdi Moharreri, D.r Mohammad Naghizade, D.r Fereshte Ahmadi, D.r Shirin Toghyani,
Volume 21, Issue 63 (12-2021)
Abstract
One of the issues facing today's cities in Iran is the issue of maintaining and upgrading existing streets. The way of managing theses streets and dealing with them has caused various problems in different aspects of cities. The purpose of this research is investigating the principles of maintenance and promotion of urban streets with a focus on Islamic teachings and Iranian culture. This research also explains some ways to improve the quality of urban streets using Islamic teachings and Iranian culture. Gathering information was done through observation, field study and documentary studies. Using content analysis methods, documenting and graphical analysis, information and data were analyzed. The quality of the cities depends on the quality of the streets and the quality of the streets is also based on the details of the streets. After designing and constructing urban streets, they need attention, maintenance and promotion in order to be always attractive and desirable for citizens. The results of this study indicate neglecting the indigenous material, art, culture, religion, needs and interests of citizens which has led to the construction of unqualified urban spaces in the metropolitan areas of today's Iranian cities. This research did not seek to provide a template for urban streets designing, but it is in direction of developing principles of planning and designing urban streets based on Islamic teachings and Iranian culture. In addition to having appearances according to Islamic teachings and Iranian culture, desirable street for Iranian citizens should also be Islamic and Iranian internally. With Just the correctness of appearances it can be said that only hypocrisy is obtained, but with internal reforming, honesty can be created in urban spaces.
Abdolmajid Ahmadi, Ebrahim Akbari, Javad Jamalabadi, Maryam Alemohammad,
Volume 22, Issue 64 (3-2022)
Abstract
Awareness of the status of vegetation, land use change and surface temperature in each region, and the timing and location of their changes over time are important for micro and macro planning. In order to make optimal use of land, knowledge of land use changes is necessary, which is usually possible by detecting and predicting land use changes. Measuring the role of researches and researchers has been instrumental in the study of natural resources, especially vegetation, surface temperature and user variations in each location, as well as the availability of information for different times for valuable studies. In this study, ETM and OLI were used to study the process of land use change, vegetation cover, surface temperature, and hazards caused by them in perennial seasons. The results show that the area of use changes over the period 2000-2010 has decreased the area of use of the developed area, agricultural and growing gardens and the area of land and rangelands. Artificial vegetation has risen in aggregate and rangeland lands are showing a decreasing trend. Due to the importance of vegetation and its role in reducing the temperature of the earth's surface, the trend has been decreasing in regions with intensive vegetation and high temperature. Also, in the period from 2010 to 2017, the range was further increased and the city's growth continued sporadically, causing environmental changes and rising temperatures in the city. The change in the city's increased range has increased environmental risks, including the loss of good agricultural land and the increase in the temperature of the city. Due to the fact that most agricultural land is located in the vicinity of the city under cultivation of saffron, which in the warm seasons does not have surface coatings, changes in the type of cultivation can also affect the temperature of the earth.
Ahadollah Fatahi, Afsaneh Ahmadi, Vahid Riahi, Hamid Jalalian,
Volume 22, Issue 64 (3-2022)
Abstract
The diversification of economic activities in rural areas is considered as a strategy where rural households increase their income sources. The villages of Saqez city, despite having high environmental potential and capacity in different sectors, such as agriculture, have a poor livelihood and economic status. Therefore, the present article seeks to answer the following questions: What are the appropriate strategies for diversifying economic activities in the villages of Saqiz? The present study was conducted through descriptive-analytic method. In a survey method, SWOC analysis model and QSPM evaluation matrix, we presented appropriate strategies. To design a strategic model and determine the ranking of factors 20 from experts and also to factor out the factors of 300 villagers in the area. The study sample is selected as sample. The results of the SWOC model show that the existence of an appropriate ecosystem in the region for tourism development, the existence of four climates in the region and the possibility of cultivation in each season, as well as the presence of the leading farmers in the region, are the most important strengths against the weakness of the financial and economic context of many Villagers and traditional exploitation are the most important internal weaknesses for diversifying economic activities in the study area. Also, the results of this model indicate that in the external environment 34 opportunities have been identified, the attention of the authorities to the conversion and complementary industries, the border area and the suitable field for exporting agricultural products to the Iraqi countries, are the most important external opportunities and in contrast to 36 challenges and limitations. The key factors of the migration and exodus of elite educated to Tehran and neighboring provinces, climate change and increasing natural hazards such as floods and droughts are the most important external barriers affecting the diversification of economic activities in the villages of the study area. Also, the results indicate It gives diversification of the activities of the economy The studied villages should be focused on strengths and opportunities.
Reyhaneh Salehabadi, Mr Mohammad Reza Hafeznia, Mr Seyyed Hadi Zarghani, Syrus Ahmadi,
Volume 22, Issue 66 (9-2022)
Abstract
The national strength of algebraic aggregation is a large number of positive and negative factors that are composed of numerous sources and resources. One of the important sources of national power in the world today and in the post-Cold War period is economic power, which is itself the bedrock of other superstructures, such as political, military, and so on. This research uses descriptive-analytical method and using library resources and field research to answer this question. What are the most important variables and indicators that shape economic power of countries? The findings of the research by examining library documents show that the four main components of economic power including infrastructure, production exchange, production level and financial resources can affect economic power. Meanwhile, 61 variables related to quadruple components were identified. Then, by using the Likert spectrum questionnaire, internal knowledge was measured to measure the importance of each of these variables. Accordingly, economic infrastructure, high-tech exports, food imports and international currency reserves were of high importance. On the other hand, variables such as the share of the poor in the consumption of national income, economic competition, foreign ownership, and commercial costs of violent crimes were of minor importance. Finally, it can be argued that countries have an obligation to take into account the factors and variables in the economic dimension to achieve their national interests and interests.
Esmaiel Safaralizadeh, Majid Akbari, Vahid Boostan Ahmadi, Chamran Mousavi,
Volume 22, Issue 66 (9-2022)
Abstract
the development of sustainable urban development depends on providing relative prosperity, citizen participation and increasing social awareness for all members of society. The purpose of this paper is to measure social capital indices and its relationship with sustainable urban development in urban areas of Ahwaz. The present study is a descriptive-correlational one from a methodological point of view. From a single point of view, it is based on structural equations which has been done in Ahwaz in 2018. In this regard, library studies have been used to explain the literature and theoretical foundations and field method has been used to study the case study. Data collection tool is a researcher-made questionnaire. Structural equation modeling and confirmatory factor analysis were used to analyze the descriptive-inferential statistics data and SPSS and Amos software were used. The statistical population of the study was 384 citizens of Ahwaz city and the sampling method was random. The results of this paper showed that social capital and Sustainable Urban Development status are different between Ahwaz city areas. In other words, high social capital among the citizens of Ahwaz is a means of enhancing the sustainable urban development and structural dimensions of the city including economy, community, institutions, space and environment. The implications of this research for the strong link between social capital and sustainable urban development, the need to pay attention to the components of social capital and to adopt policies to maintain, enhance and enhance social capital to ensure sustainable urban development in the geographical area of Ahvaz. It looks great.
Mrs Malihe Mohamadnia, Dr Abolghasem Amirahmadi, Dr Mohamadali Zanganeasadi,
Volume 22, Issue 66 (9-2022)
Abstract
The purpose of this research is to use granulometric analyzes in desertification studies in Gonabad city, To achieve this goal, after the preparation of geomorphological maps of the region, 14 sediment samples were taken from the erosion-sensitive facies of the region. In the laboratory, a series of sieve with a diameter of 2000, 1000, 500, 250, and 64 micrometers, and a container Gatherings of sediment smaller than 64 μm were screened. The results showed that the highest frequency of particle diameter in sand samples was in the 250-225 micron class. And, given the average particle relationship with their transport intervals, it can be concluded that the distance between the particles was close to a point. Variants of different samples varied from 1.502 to 1.319. The most prevalent plots of ridge and the smallest slopes with low slope were the highest. In surveys in the skidding section, precipitates were mostly positive tilted, indicating the prevalence of fine particles in the region.
Abolghasem Amir Ahmadi, Leila Goli Mokhtari, Naemi Tebar Mahnaz,
Volume 23, Issue 70 (9-2023)
Abstract
The purpose of this study was to identify evidence of late Quaternary glaciers in the northern highlands of Binalood. Topographic maps, satellite imagery and climatic data are the tools and data used in this study. Arc gis 10.4 software was used for data analysis. Quaternary glacier evidences were identified based on four types of evidences including morphic indices, climatic evidences, geomorphological evidences and laboratory indices. Using morphic indexes, the curve lines were identified on topographic maps of satellite imagery, ice-dominated areas, and the effects of 28 glacial circuses. Climatic evidence shows that not only was Quaternary at about 7 degrees cooler than the present time, but its precipitation was almost twice as high as at present. On the other hand, glacier circles, moraines, thales and glacial mounds were the most prominent geomorphologic evidence of glaciers in the Binaloud Heights. Finally, granulometric laboratory indices supplementing the evidence of glaciers have confirmed the existence of glacial sediments at the Binaloud Heights. Also, using Wright's method, the permanent snow boundary line during the reign of Binalood Heights Glaciers was estimated at 2600 m.
Reyhane Salehabadi, Syrus Ahmadi, Afshin Motaghi,
Volume 23, Issue 71 (12-2023)
Abstract
Borders are known as places where government institutions implement their own law in a variety of ways and forms. Given the different approaches to border control and management, it can be seen that this issue is still viewed as a security issue in developing countries, including Iran, and most of the approaches related to this are from a purely security perspective. The boundary view must be multidimensional and comprehensive. In this study, we seek to answer the questions of how land border management can be done. And which of the indicators of border management is more weighty and important? Therefore, the research method is a combination of Kendall, Demetel and AHP methods. The findings of the study show that we have five main components of border management in economic, cultural-social, civil, security-military and integrated management, and each of the seven components. Using these techniques, it can be stated that indicators such as identifying and identifying opportunities and identifying their fertility factors (0.1), studying and understanding the geographical location and spatial conditions of border regions (0.099), can be determined and determined. Identifying threats and identifying their roots and factors (0.098) and excluding border areas of isolation (0.096) are the most important. Therefore, it can be concluded that border management should be considered in combination with other factors, ie the application of only one approach, such as economic or security, cannot solve the problems of the country's border regions.
Akbar Mirahmadi, Hojjatollah Yazdan Panah, Mehdi Momeni,
Volume 24, Issue 72 (3-2024)
Abstract
In recent years, the technology of crop production has been greatly expanded using satellite data. Today, Landsat 8 and OLI sensor data, with a spatial resolution of 30 meters, allow the discovery of factors that control phenology on a local scale. In this study, the remote sensing indices - NDVI, EVI, Greenness, and Brightness - obtained from the OLI sensor and the GCC index obtained from digital camera images were used to estimate the phenological stages of the rapeseed plant. The Savitzky-Goli filter was used to remove outlier data and to produce smooth curves of time series of plant indices. The results showed that the curves obtained from the indices of NDVI, EVI, GCC show all four stages of remote sensing phenology – green-up, dormancy, maturity, and senescence - well, but the Greenness index did not show the dormancy stage well. The Brightness index curve shows the inverse behavior to other curves. According to Pearsonchr('39')s correlation test, GCC index data are correlated with NDVI and Brightness index data .we used the ratio threshold, rate of change and first derivative methods, to estimate "start of season" and "end of season" and the results showed that the first derivative and ratio threshold methods with an average difference of 18 and 19 days in the "start of the season" and the rate of change method, with an average difference of 8 days, has the best performance in estimating the “end of the season”. Also, the Brightness index with an average difference of 16 days and the EVI index with an average difference of 7 days have the best performance in estimating "start of season" and "end of season", respectively.
Sanam Afaridi, Fereshte Ahmadi, Ali Soltani, Mahmood Mohamdi,
Volume 24, Issue 73 (6-2024)
Abstract
Optimal condition of accessibility and rapid, easy, and safe travel to health_ treatment land uses can be performed by the systematic analysis of transportation sub-systems like behavior. Developed countries are in essential need of proper transportation system for better accessibility. This paper aims to develop model, considering mode chains as well as the individual characters. This study benefits the analytic and quantitative research methods in developing mode choice model to evaluate the movement pattern of travel to health care centers in Shiraz central district (district 1). Each mode is the dependent variable whereas the socioeconomic characters are the independent variables. Filled questionnaire and geographical information system is used in collecting data. To generate the model, multinomial logit model was used that shows public transport like metro and bus are not the popular modes in access to hospitals. Movement pattern cognition in accessibility to special urban land uses, has an efficient role in urban policies and planning, which can be generalized and indigenize to healthcare travel behavior in other geographical areas. Results show that car ownership will increased the private car travel rate 8 times according to beta coefficient.. Taxi is the mode which is used in all three travels. People with lowest range of income and education use bus as their mode. Besides metro travel also has significant relation with low level of income and increase the travel rate 9 times.
Keywords: logit Model, Hospital, vehicle, travel mode, Shiraz City.
Ms Parisa Ghorbani Sepehr, Dr Zaki Yashar, Dr Seyed Abbas Ahmadi,
Volume 24, Issue 75 (12-2024)
Abstract
Due to its location in low latitudes, Iran is among the countries that has not been spared from the security consequences of climate change. The present study seeks to answer two questions: 1) What are the security consequences of climate change on Iran and which components have the greatest impact on Iran? 2) Which of the pillars of good governance as a solution has the greatest impact on reducing the effects of climate change on Iran?
In this study, the study population is elites and experts familiar with the subject of the study, 100 of whom were selected for snowball sampling and a researcher-developed questionnaire was used to collect data. Data were evaluated using SPSS and MINITAB software. The results of the studies according to the obtained P-value which is equal to 0.000 and is less than 0.05 alpha, indicate the difference between the natural and human consequences of climate change in Iran. The results of the Tukey test indicate that the natural consequences of climate change with an average of 4.0584 are in group A and the human consequences with an average of 3.4460 are in group B. Also, the results of Friedman test on the effect of good governance in controlling and reducing the security consequences of climate change in Iran show that accountability with an average of 5.79 in the first place, rule of law with an average of 5.62 in the second place. and accountability of officials with an average rating of 5.32 are in third place.
Hamed Heidari, Darush Yarahmadi, Hamid Mirhashemi,
Volume 24, Issue 75 (12-2024)
Abstract
Human interventions in natural areas as a change in land use have led to a domino effect of anomalies and then environmental hazards. These extensive and cumulative changes in land cover and land use have manifested themselves in the form of anomalies such as the formation of severe runoff, soil erosion, the spread of desertification, and salinization of the soil. The main purpose of this study is to reveal the temperature inductions of the land cover structure of Lorestan province and to analyze the effect of land use changes on the temperature structure of the province. In this regard, the data of land cover classes of MCD12Q2 composite product and ground temperature of MOD11A2 product of MODIS sensor were used. Also, in order to detect the temperature inductions of each land cover during the hot and cold seasons, cross-analysis matrix (CTM) technique was used. The results showed that in general in Lorestan province 5 cover classes including: forest lands, pastures, agricultural lands, constructed lands and barren lands could be detected. The results of cross-matrix analysis showed that in hot and cold seasons, forest cover (IGBP code 5) with a temperature of 48 ° C and urban and residential land cover (IGBP code 13) with a temperature of 16 ° C as the hottest land use, respectively. They count. In addition, it was observed that the thermal inductions of land cover in the warm season are minimized and there is no significant difference between the temperature structure of land cover classes; But in the cold season, the thermal impulses of land cover are more pronounced. The results of analysis of variance test showed that in the cold period of the year, unlike the warm period of the year, different land cover classes; Significantly (Sig = 0.026) has created different thermal impressions in the province. Scheffe's post hoc analysis indicated that this was the difference between rangeland cover classes and billet up cover.
Dr Esmaeil Najafi, Mr Abolfazl Faraji Monfared, Dr Mehdi Ahmadi,
Volume 25, Issue 76 (3-2025)
Abstract
The expansion of arid and semi-arid regions in Iran has caused that most of the mentioned phenomena to be seen in the study area. Alluvial Fans are the landforms that are spread in different areas.
Identifying the productive processes and assessment of their effects can help to manage natural hazards, as well as help the land use planning. In the present study, the tectonic activity at the surface of alluvial fans in the south of Kharqan Mountain in the northeast of Hamadan province was studied. The studied Alluvial Fans were located in the south of the Kharqan Mountain in the northeast of Hamadan province. First, the process of development of Alluvial Fans in the area using different maps was investigated (consisting of two Gozel Valley, Celery conifers, and several small Alluvial Fans), and the available evidence on the tectonics of alluvial Fans in the area were studied. The obtained results of the research show that in parts of area such as the eastern of the gozel valley cones the tectonics is active, and the areas such as alluvial Fans that be located between the Gozel Valley was inactive. Other evidence in the bed of the Gozel Alluvial Fans shows the changes in terrain due to the activity of faults in the eastern part of the study area, which changed the pattern of waterway movement in the riverbed and led to the destruction and exploration of the river. Also, the drainage pattern and sediment depth at the surface of alluvial fans were due to tectonic activities in alluvial fans. The prepared geological logos show the slow and active periods in different geological periods in the region. Therefore, it started with a long slow period, then continued with tectonic activities and fluctuations.
Mr Syrous Ahmadi Nohdani, Mr Aziz Nasirzade, Miss Reyhane Salehabadi,
Volume 25, Issue 76 (3-2025)
Abstract
When empires and great nations decline, there are many reasons why there is a connection between them. Empire is considered as a regulating power in the world that by studying history, one can discover the existence of several important empires in different eras. Given that empire is related to geopolitical knowledge and its constituent concepts (power, politics and space), it can be studied and explored from this perspective. The purpose of this study is a geopolitical analysis of the collapse of empires. This descriptive-analytical study uses the field method to investigate the geopolitical factors of the collapse of empires (Persia, Rome, Byzantium, Ottoman, British, Russian, Spanish and Arab). The statistical population is 50 experts in the field of geopolitical studies. To test the conceptual model of the research, Demetel method has been used. Findings show that variables such as incompetence and lust of rulers, collapse of the domestic economy, increase and corruption of the male government, oppression and slavery, internal riots, etc. show high interaction and strong systemic relationship with other variables. That is, as long as a country has faced these challenges in terms of manpower and governance, it has not been able to survive in the face of other problems caused by these factors, and these factors have led to crises and the collapse of the empire.
