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Showing 681 results for Type of Study: Research

Mostafa Taghvaee, Sadroddin Motevali, Gholamreza Janbaz Ghobadi,
Volume 25, Issue 77 (6-2025)
Abstract

Cities occupy vast areas. These fields are composed of different topographic and morphological units. As cities develop and expand, their dealings with various units of topography and geomorphology and related topics increase. Geomorphological units are always associated with the dynamism of the natural environment. Any action for the development of cities in some way intersects with the mentioned dynamism and detachment, and consequently with morphological phenomena. In this approach, if some necessary principles and points are not observed, the morphodynamic balance of the environment will be disturbed and the great dangers of most of the equipment and facilities of the city will be threatened. Sometimes the intensity of morphogenesis is so high that it produces irreversible results. The present study is descriptive-analytical in terms of purpose and in terms of data collection method and in the form of a survey or field in which the researcher has made a questionnaire. The purpose of this study is to investigate the role of roughness in coastal city planning using a comparison of AHP and AHP FUZZY hierarchical analysis in Noor city. In addition to the main goal, The results showed that in the early stages of the planning process, simple methods can be sufficient when identifying development options as a focal point. Under these circumstances, the choice of advanced and technologically advanced methods does not necessarily produce different results. However, when planning needs to identify the spatial extent of the desired development area, it would be ideal to consider the intersection area proposed by both methods

Narges Karimi, Farah Habib, ,
Volume 25, Issue 77 (6-2025)
Abstract

A sense of belonging to an environment is an emotional connection that takes place between people and the external environment. Many studies have shown that the existence of this connection and its deepening between the person and the environment has a significant role in promoting the physical environment and the emergence of positive social behaviors. Therefore, recognizing the sense of belonging and the factors affecting it and ways to improve it is one of the issues that can lead to the improvement of living conditions and physical environment. Among the many factors that affect the sense of belonging, the time factor as one of these factors can be effective from two perspectives; Duration of residence and age of the environment. In this study, while researching the effect of each of these factors on the sense of belonging of residents, a comparison between these two factors and the intensity of the effect of each on the sense of belonging has been done. The present study is applied in terms of purpose and descriptive-analytical in terms of method. In order to collect the required data and information, library and field methods and questionnaire tools were used. The statistical population of the study consists of citizens living in the six studied neighborhoods in Zanjan. The sample size was estimated to be 300 people using the Cochranchr('39')s formula. SPSS software was used to analyze the data. The results showed that the sense of belonging in the study areas is moderate to low. The results also showed that the duration of residence and the age of the environment have a positive and significant effect on the sense of spatial belonging and its components. Among the variables, the effect of the environment variable on the sense of spatial belonging is greater than the length of stay, so that the age of the environment predicts 27.1% of the variance of the variable of spatial belonging.

Alijan Shamshirband, Reza Nasiri Larimi, Seyed Mehdi Ahmadi,
Volume 25, Issue 77 (6-2025)
Abstract

One of the areas of activity that is considered in the municipalities of the country, especially in the metropolises, is the acquisition of property, which is handed over to the municipalities in order to realize a detailed plan, a comprehensive urban plan and a plan to improve and renovate worn-out structures. Be. Therefore, annually, in order to develop the city, the municipalities construct or improve roads and construct recreational and cultural places. The purpose of this study is the legal pathology of property acquisition in a dilapidated area of ​​historical value by the municipality of Sari. The present study, in terms of descriptive-analytical nature, is an applied-developmental research based on survey and field methods. The method of collecting the required data for the research was based on the library method, documentary method and field survey method (with a questionnaire) with a sample size of 384 citizens of Sari. Chi-square statistical analysis in SPSS software was used to analyze the data in the present study. The results show that the most important internal damage of the municipality in the acquisition of property located in the dilapidated areas of Sari, respectively, including poor information of laws and legal mechanisms, lack of coordinated executive procedures, lack of continuous tariff updates. The price of real estate is the lack of timely implementation of plans and plans and the lack of legal studies in the preparation of plans. Therefore, Sari Municipality should increase the strengths and reduce the weaknesses and create structural and functional cohesion and internal integration in the ownership of the properties located in the project, rather than inter-sectoral (inter-organizational) and extra-sectoral (extra-organizational) extraversion. To organize the worn-out tissues of Sari city.

- Farhad Judi, - Rahim Sarvar, - Sedigheh Hassani Mehr,
Volume 25, Issue 77 (6-2025)
Abstract

Recognizing and measuring the quality of life in urban areas that are the result of the actions of urban management and other public and private institutions is a very vital issue. Due to the lack of quality of urban life in informal urban settlements, it is possible to provide a roadmap for urban management and awareness of responsible institutions of the current situation and action to achieve the desired situation. The purpose of this study is to assess the quality of life in informal settlements in Miandoab. The research method is descriptive-analytical and based on data collection in the field through a questionnaire. The validity of the instrument and its reliability were confirmed by Cronbach's alpha greater than 0.70. The statistical population of the study consists of 11545 citizens living in informal settlements in Miandoab. The sample size was determined based on Cochran's formula, 313 people. The test results show that four indicators of social, economic, physical and environmental quality of life in informal settlements of Miandoab were significant at a level of less than 0.05. Examination of the direction of significance indicates the inappropriateness of the indicators. The ANOVA test also confirmed that the 10 neighborhoods studied in terms of social, physical and environmental indicators are significantly different at the level of less than 0.05, but in the field of economic indicators (significance level equal to 0.094) there are the same conditions. Assessing the effect of urban management on improving the quality of life through structural equations also confirmed that the rate of explanation for the social index is equal to 0.97; For economic index equal to 0.48; It is equal to 0.93 for the physical index and 0.55 for the environmental index. Therefore, the greatest effect of urban management is on the social index and then the physical.

Moslem Seydi, Kamal Omidvar, Gholamali Mozafari, Ahmad Mazidi,
Volume 25, Issue 77 (6-2025)
Abstract

Abstract
Climate change is an important environmental issue because the melting processes of glaciers and snow density are sensitive to climate change. Today, a variety of satellite sensors such as AVHRR, MODIS, GEOS, MERIS are available for snow monitoring and are widely used to investigate and investigate the fluctuations and changes in snow cover globally. Modis sensor has been considered more because of its global spatial coverage with suitable spatial accuracy and frequent temporal coverage on different scales , Therefore, in the present study, snow products of this sensor were used. In this study, after collecting statistics and data on snow-related days during the statistical period (1989-2018) in three provinces of Kermanshah, Ilam and Lorestan, they were processed using Modis snow cover data in middle Zagros as well as remote sensing techniques, Finally, the snow cover changes in the study area were studied in detail. NDSI index was used in MODIS sensor products to detect snow cover. Consequently, in order to differentiate pixels and identify different phenomena, the received images were processed in GIS environment. .  Investigation of snow cover changes in different seasons using Modis sensor images shows that most of the studied area has a significant decreasing trend, especially in the elevated areas of the study area And only in the western and southwestern regions of the study area, there is no specific decreasing trend. Also, the study of snow covered days during the study period indicates a decrease in middle Zagros snow cover and these changes have been intensified in recent years, especially in snow-covered areas of the region. Also, changes in winter and snow-capped and elevated areas were more and more severe than other seasons and other regions in the study area.           
Seyed Komeil Salehi, Ms Habibeh Nabizadeh, D.r Amineh Anjem Shoa,
Volume 25, Issue 77 (6-2025)
Abstract

The purpose of this study was to investigate the factors affecting the increase in attractiveness of tourism purposes in Tehran. The present research is descriptive-analytical in terms of purpose and method. The data collection tool is a question and interview. The statistical population of the study includes experts and experts in the field of tourism, which was selected using Cochran formula and simple random sampling method, 210 tourism experts were selected as samples. Descriptive tests and logistic regression test were used to analyze the data. The results of this study indicate that from 210 active in Tourism in Tehran, 91 people believed in 43.3%, with attractiveness of tourist destinations in Tehran at high level, 29% believed that the level of charm at the appropriate level and only 27% He believed that the attractiveness of tourist destinations in Tehran is at a low level. The results in the field of effective factors on increasing the attractiveness of intentions due to tourism development also showed that among the four factors intended, respectively, factors of 1) innovative business opportunities with impact coefficients (613/0), 2) assets Natural / cultural and historical city with a coefficient of impact (0.577), 3) Development of tourism infrastructure with an impact coefficient (0.497) and 4) urban development agent with an impact coefficient (0.473) had the most effects on increasing attractiveness Due to tourism development in Tehran.

Aliakbar Jafarloo, Monireh Ghofran, Sahar Nazari,
Volume 25, Issue 77 (6-2025)
Abstract

Considering the recent challenges of urban and rural areas of the country, in the previous years, urban and rural areas of Iran will face uncertainties and major issues. The purpose of the land and the elimination of the challenges of urban and rural issues in the country in the future requires identifying these issues and planning to fix or decrease its effectiveness. Therefore, in this research, using a futuristic approach that has a qualitative-descriptive approach, the purpose of the research was investigated. To achieve this goal, first, with the use of research literature and library studies as well as the help of 70 experts in various fields, first major issues in urban and rural development and land were identified in the horizon of Iran 1420. Subsequently, with the method of qualitative analysis and experts, the strategic scenarios of the country was presented to resolve the challenges of the country in the 1420 horizon. The results of the study showed that the country's study in the horizon of Iran 1420 with sudden abrupt disorders and increased uncertainty alongside economic, social, political, environmental, demographic, geopolitical, climate change, cyberspace, increase inequalities And there will be no predicted and untreated threats. In this regard, 20 future scenarios were designed and designed to address the macro issues presented in the research, which are designed and designed to challenge current assumptions and important questions for the future of the country. These scenarios show a number of strategic considerations for how to prepare the country to meet the developing needs of urban and rural community in the horizon of the country of 1420 in the face of a very dynamic and uncertain future.
 
Abolfazl Meshkini, Mohammad Reza Bahrami,
Volume 25, Issue 77 (6-2025)
Abstract

In the creation of urban space, there is always an exchange of ideas about what the space is now and how it should exist, by those who live in that place. So improvement in its harsh reality is realized in some of their thoughts in the form of a physical change in the current environment - and urban regeneration is one such form. Considering the increase in the number of urban regeneration projects in recent decades, it is very important to pay attention to the social dimensions in it. On this basis, social capital, as one of the social potentials of the neighborhood, is a concept that has gained special importance in regeneration. Considering the necessity of the subject, this research has analyzed the role of social capital on the regeneration of urban neighborhoods. The applied research method is descriptive-analytical in nature and the main goal of this research is to analyze the role of social capital in the regeneration of Islamabad Karaj neighborhood among the residents of the neighborhood. In this regard, the data collection in the theoretical part was based on the documentary method and in the practical part, the survey was based on the questionnaire. The statistical population of this research is made up of people over 15 years of age living in a neighborhood of over 25,000 people using a simple random sampling method, so a sample of 410 people was selected from this population using Cochran's formula. For data analysis, Spearman's correlation coefficient and multiple linear regression were used using spss software. The results showed a strong correlation between social capital and urban regeneration in Karaj neighborhood of Islamabad. The implications of this research on the relationship between social capital and urban regeneration increase the need to pay attention to the components of social capital and adopt policies to maintain and promote it in order to ensure successful urban regeneration in the neighborhood of Islamabad Karaj.

 
, , Jamaleddin Honarvar,
Volume 25, Issue 77 (6-2025)
Abstract

The Corona virus epidemic has raised many challenges for countries around the world, with the tourism industry not missing. To address these challenges in the tourism industry, recovering and compatibility measures are a matter that requires more attention. Given the importance of this issue, this study examined the resuscitation and recovery of urban and rural tourism during the post -Corona era. The present study is the functionality and method of doing it (qualitative and quantitative). The data collection and information collection tool is exploratory and deep. Research societies are research experts and experts in the field of tourism, which were used by the non -explicit sampling method and targeted 50 deep interviews. The qualitative method of theory, the Stras, and the Corbin were used to analyze the information and answer the research questions. The results of the study show that according to experts, 34 concepts were identified for the restoration and recovery of urban and rural tourism in the post -Corona era. The restoration and restoration of rural tourism is primarily influenced by the holding of small tourism festivals, eco -tourism development, local tours development, promoting agricultural tourism, ecotourism and rural tourism development. While digitalization of tourism services, travel restrictions, expansion of health tourism, tourism cooperation, increased online guides and tour leaders, and expanding virtual trips are the most important measures to restore and restore urban tourism. The results of this study can also be used to restore and restore urban and rural tourism in other parts of the country.

Mr Fazllollah Karimi Ghotbabadi, Dr Ali Zangiabadi,
Volume 25, Issue 77 (6-2025)
Abstract

Earthquakes resilience, which is actually how social, economic, institutional, geographical, etc. capacities of societies are affected by earthquakes, is one of the issues that should be considered in any society. It is worth noting that the type of attitude towards the issue of resilience and how to analyze it on the one hand, plays a key role in how to recognize resilience and its causes, and on the other hand also influences policies and measures to reduce risk and how to deal with it. The purpose of this study is to rank the resilience of new urban Habitations in the ​​Isfahan Metropolitan earthquake risk using a combined index. Due to the studied components and the nature of the subject, the approach of this research is "descriptive-analytical". The statistical population of this study includes 6 new urban Habitations of Shahin shahr, Majlesi, Sepahan shahr, Fooladshahr, Baharestan and Shahid Keshvari. This research is applied in terms of purpose and in the research literature section, information has been collected through the library method. Based on the results of POSET, Majlesi, Baharestan, Foolad shahr, Sepahan Shahr, Shahin Shahr and Shahid Keshvari Habitations with the sum of options 3, 6, 7, 8, 11 and 14 in terms of the combined index of resilience against earthquake risk, respectively. They have 1-6. Therefore, in order to reduce the adverse effects that resilience has on any community, paying attention to the capacities of each Habitation is one of the issues that should be considered in every community to prevent human and financial losses caused by possible accidents.
 
Mr Habib Fasihi, Mis Mina Heydari,
Volume 25, Issue 77 (6-2025)
Abstract

Beauty is among the highest human needs. Man has paid attention to the sense of aesthetics since he built cities.The aim of this study was to compare the two locations of Golestan and Moradab as the two most famous and unenjoyable places in Karaj city in terms of aesthetic indicators of urban spaceThe research method was descriptive-analytical and data were collected on 14 selected components related to urban environment aesthetics by direct observation method and evaluation list expression. For analyzing and comparing the aesthetic level of the two neighborhoods, descriptive statistical parameters have been used and for analyzing spatial inequalities, zoning maps have been drawn in geographic information system and calculations and analysis on related descriptive table. Considering the evaluation of indicators in the range of 1-10 points and the higher score to the higher level of aesthetics, the findings showed that the mean of total indicators in Golestan area was 6.31 and in Moradab area was 2.57. Also, in Golestan neighborhood, mianiyah cultifar is 6.43 and the first quadrant is 4, while in Moradab area these figures are 1.78 and 1, respectively. Spatial analysis of zoning chart showed that in Golestan area there are no indicators, areas that are aesthetically at "very low" and "low" levels, whereas in the lagoon area, no area is located at "high" and "high medium" levels, It can be concluded that Golestan area is at a high level in terms of aesthetic indicators and there is a lot of spatial inequality within and between the two studied sites.

 
Laaya Jalilian, , Mohsen Ahadnejad, Hiwa865@gmail.com,
Volume 25, Issue 77 (6-2025)
Abstract

Policy-making in tourism development planning requires the use of new methods in the field of urban governance. In accordance with this approach, it is necessary to apply policy focusing on the processes of "developing a good governance model for tourism in the post-corona era in Iran" in order to solve the problems caused by this disease, which puts double pressure on the body of the tourism industry, through To reduce the evaluation of tourism governance indicators and provide the basis for their implementation. The method of this research is descriptive-survey and with practical purpose, using documentary studies and field research. We have used the interview tool for the qualitative part (data analysis of the foundation) and studying the appropriate indicators of tourism. The statistical population includes elites and people involved in tourism in the country, and the statistical sample includes 14 of these people, who were selected by a combination of judgmental and snowball sampling methods. In-depth semi-structured interviews were conducted by comparing data in open, central and selective coding until the stage of theoretical saturation and separation of main and sub-categories, and the data theory method of the Strauss and Corbin Foundation (1998) was used to analyze the obtained data. has been The results of this research, according to the identification of the indicators of meritocracy and the introduction of the causal conditions of the use of meritocracy in Iran's tourism industry, lay the groundwork for the formation of consequences such as; Improving the business environment, especially after the recession crisis of this industry due to the spread of Covid-19, creating a competitive advantage, etc. through providing suitable platforms, including: organizational measures, strengthening and improving infrastructure, technological capabilities, etc. and using information and communication management strategies, marketing strategies, supervision and monitoring, etc., which are displayed as a model.
 

Zohreh Maryanji, Fatemeh Sotoudeh, Meysam Toulabi Nejad, Ziba Zarrin,
Volume 25, Issue 77 (6-2025)
Abstract

Understanding and predicting future climatic conditions and characteristics is essential because of their importance in all aspects of life. This study seeks to examine the process of modifying temperatures in the Hamedan region by using Downscaling data to predict the public circulation data and its changes. The Lars Explore Downscaling Model has been used to fine-tune the data of the General Transport Model (HADGEM2-ES) and the paired model (CMIP5) and under the three release scenarios RCP2.5, RCP4.5, and RCP8.5). Estimates of the correlation of simulated data and actual data show values of more than 0.95 for all months. P_value also showed the statistical tests of model output, acceptable values in model performance in production and simulation. As a result, the data were extracted from 2011 to 2050. Data were examined in three intervals to detect trend changes. The results show that in the optimistic scenario (RCP2.5) there is no tangible trend in the mean and minimum temperature, while in the RCP4.5 and RCP8.5 scenario there are significant trends in temperature data and accordingly increase the minimum temperature, according to the increase in the minimum temperature, according to the increase in the minimum temperature, according to the increase 1 degree in the average temperature. It shows severe climate change that, especially in the cold season, changes the type of precipitation. Also, based on the data process, the significant increase in the average annual and monthly scale temperature in all three scenarios under study will indicate the environmental crisis ahead.

Mrs Fatemeh Vatanparast Galeh Juq, Dr Bromand Salahi, Batoul Zeinali,
Volume 25, Issue 77 (6-2025)
Abstract

In this research, the effect of two indicators OMI and RMM of Maden Julian fluctuation on the frequency of dust storms in Abadan, Ahvaz, Bostan, Bandar Mahshahr, Dezful, Ramhormoz and Masjed Soleyman located in Khuzestan province during six months (April to September) of the statistical period (1987 - 2021) was reviewed. Pearson's correlation coefficients between dust data and indicators were investigated and its results were calculated in the form of income zoning maps and the frequency percentage of each indicator for positive and negative phases. The results of the research findings indicate that there is a direct and significant relationship between the positive and negative phases of both indicators with dust, except for Dezful station in the positive phase of OMI and the negative phase of RMM and the highest correlation coefficient for Bandar Mahshahr and Dezful station is between -0.7-20.77 is in the positive phase of the RMM index. The relationship between the Madden Julian Oscillation and dust showed that between 51 and 59 percent of dust storms occurred in the negative phase of the OMI index and 40 to 49 percent in its positive phase. In the RMM index, 56 to 63 percent of dust storms occur in its negative phase and 37 to 50 percent in its positive phase. In fact, the negative phase of the RMM index has a higher percentage of dust storms than the negative phase of the OMI index. According to the results of the Monte Carlo test, the displacement of the positive and negative phases of the RMM index significantly leads to the occurrence of dust storms for most of the stations in Khuzestan province. Tracking the paths of dust entering Khuzestan province with the HYSPLIT model shows the movement of particles from Iraq, Arabia and the eastern parts of Syria towards the studied area.

Mis Ameneh Alibakhshi, Dr Mohammadreza Pourmohammadi, Dr Rasoul Ghorbani,
Volume 25, Issue 77 (6-2025)
Abstract

In recent decades, one of the main challenges in regional development studies is trying to understand the economic and cultural differences between the national and regional levels, so that the obstacles facing regional development can be removed.  One of the systems that plays an important role in the development of regions is the regional innovation system. For this purpose, the aim of the current research is to identify the key drivers effective on regional innovation in the metropolis of Tabriz. In this regard, the current research is applied in terms of purpose and descriptive-analytical in terms of nature. In order to collect the required information, both library and field methods have been used. The statistical population of the research includes 32 qualified people in the industry, university and government sectors who were selected by purposeful sampling. Mic Mac software was also used for data analysis. The findings of the research show that out of a total of 71 influential factors, 13 factors include the appropriate culture of productivity, laws and regulations, the existence of a teamwork culture between activists and established industrial units, information and communication technology infrastructure, sufficient funding for university research infrastructure, and higher education. patent programs, higher education policy, performance evaluation and reward system, financial support, special and flexible tax system for research and development, the existence of joint research centers between universities and industry and the level of interaction and cooperation between universities and industry, a key role in innovation They have an area of Tabriz metropolis.
 
Elham Homayooni, Dr Elham Pourmahabadian, Sina Razaghiasl,
Volume 25, Issue 77 (6-2025)
Abstract

How to design the work environment has a direct relationship with the increase or decrease of construction performance, and there are factors that if not taken into account in the design of the work environment, the administrative work will not be done properly, and in this case, it is faced with a decrease in administrative productivity. The environmental characteristics of work spaces and their impact on employees are of particular importance. On the other hand, in order to increase the productivity in the organization, we need to provide several conditions, the most important of which is the human factor, and the motivated human force to perform its duties is the most important productivity factor. The main goal of this research is to explain the optimal design model of municipal administrative spaces with an existential approach influenced by the geography of Shahrekord. Therefore, in this research, the question of what is the optimal model for designing municipal office spaces with an existential approach influenced by the geography of Shahrekord has been investigated. The research method was "descriptive-analytical" in the stage of theoretical foundations and "survey method" in the stage of expressing the findings, and the environmental variables of the office spaces, which were adapted to the indicators of existential psychology, were questioned in this questionnaire. Are after answering and completing the questionnaires by the study community, the data and information obtained from the questionnaires are analyzed in Amos and spss analytical software. The results of the research on office buildings have shown that the most important environmental parameters affecting the performance of human resources in office environments are: color, lighting, noise pollution level, visibility and scenery, indoor air quality and thermal comfort. Design, flexibility, communication, arrangement of work space and furniture, humidity, etc., which can be classified into two groups of psychological and physical components.
 

Majid Goodarzi, Ali Ashkboos, Behnam Mohammadi,
Volume 25, Issue 77 (6-2025)
Abstract

The intermediate development approach suggests that empty lands and the inner destructive structure of cities should be targeted for development instead of taking the peripheral lands of the cities under construction. Considering this importance, in this article, an attempt has been made to identify and prioritize the obstacles to the intermediate development of Zabol using Chang’s technique. The present applied study employed a descriptive-analytical research method and library and survey research (field studies) data collection techniques. The statistical population for identifying the obstacles of intermediate development consisted of all the residents of Zabol city in 2023. The sample size was calculated as 384 via Cochran’s formula. The purposive sampling method was employed to collect the data. Cronbach’s alpha coefficient calculated the research instrument’s reliability as 0.80. The obstacles were identified using a sample t-test in SPSS, and the upcoming obstacles were prioritized. The required data were collected from the existing facts of the city and through a questionnaire distributed among 20 related experts. Then, data and information were analyzed using Chang’s technique (AHP-FUZZY). The research results showed that the most important obstacle to implementing the intermediate development plan of Zabol city is the economic index, with a final weight of 483.
 

Mis Zakeyeh Aftabi, Phd Morad Kaveyani Rad, ,
Volume 25, Issue 77 (6-2025)
Abstract

 Water is a strategic and rare resource that has been severely limited in recent years due to various national and transnational variables and has severely affected the areas of security, stability, development and prosperity in countries. The high impact of water in the aforementioned areas has placed water at the center of foreign policy and hydropolitical relations of many countries, including South West Asia. In recent years, despite the issue of the water crisis and its role in the relations between Iran and Iraq in scientific, political and media circles, the dimensions of this issue remain unknown and different interpretations have been given. The current research, which is of a research nature and the required inputs were collected in a library method with the aim of obtaining a qualitative understanding of the dimensions and angles of the hydropolitical relations between Iran and Iraq, is based on the fact that, in addition to identifying the content and methodological features, the research gaps To identify the existing in this field with qualitative meta-analysis method. Using the qualitative meta-analysis method, this research has examined 34 researches conducted in the period of 2014-1402 in the form of domestic scientific-research articles, dissertations and articles in prestigious international journals. The results of the research showed that a comprehensive study has not been conducted that has investigated and analyzed the various dimensions of the hydropolitical relations between Iran and Iraq. In this regard, the lack of accurate and real data and the weakness of the theoretical-cognitive foundations of the research are among the shortcomings of the research conducted in the field of relations between the two countries.

Zahra Hedjazizadeh, Sayyed Mohammad Hosseini, Ali Reza Karbalaee, Shokofe Layeghi,
Volume 25, Issue 77 (6-2025)
Abstract

Drought is a natural hazard that annually causes significant economic, social, environmental, and life-threatening damage in vast areas of the Earth. The damages caused by this phenomenon are intangible but very extensive and costly, which, if necessary, remote sensing techniques can be a useful tool in monitoring drought due to high temporal accuracy, wide spectral coverage, ease of access, no need for atmospheric correction and ground referencing. In recent years, the province of Hamedan has faced many problems due to frequent droughts. Therefore, the present study focused on investigating and monitoring drought in Hamedan province using the Temperature Condition  index and its impact on the vegetation cover of the province using Advanced Very High Resolution Radiometer (AVHRR) and National Oceanic and Atmospheric Administration (NOAA) remote sensing data. First, the relevant data was extracted from the Nova star database, and finally, the spatiotemporal behavior of the vegetation cover drought index was examined on 1528 pixels in Hamedan province. The spatial resolution of the data used in this study is 4 kilometers.  First, the relevant data were extracted from the Navstar database and ultimately, the spatiotemporal behavior of the drought index and vegetation cover was examined. The results indicate that drought has significantly increased the vegetation cover of Hamedan province based on remote sensing data. Kendall's coefficients indicate the presence of decreasing trends in vegetation cover at a 95 Percent confidence level. Only in May, June, and December has there been a slight decrease in vegetation cover within the extent of drought in the province. The spatial behavior analysis of the drought index on vegetation cover showed that February, March, as well as April have experienced more severe droughts within Hamedan province.

Hassan Heidari, Ebrahim Mesgari,
Volume 25, Issue 77 (6-2025)
Abstract

Understanding the daily weather types of any place location plays an important role in identifying its long-term climate. In this study, we employed the Wos classification method, along with a comprehensive climatology approach, to examine key variables such as minimum, average, and maximum temperatures, as well as cloud cover and daily precipitation. Data spanning from 1985 to 2021 were collected from 39 synoptic stations that had a good distribution in the country and had complete statistics, and weather types were identified using coding techniques. The findings revealed that the predominant temperature types in the country are predominantly hot and very hot, with sub-codes indicating generally low to moderate cloud cover and no precipitation. Moreover, the utilization of Ward's clustering method enabled us to identify three distinct climatic groups. The geographical characteristics of each place, such as location, altitude, latitude, proximity to the sea, and synoptic characteristics based on their influence, have the most important effect on the regional separation of groups in the country. The results of this research can be used to determine the weather calendar of each region during different time periods in many fields of agriculture, tourism, etc.


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