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Assessing the degree of sustainability and analyzing the factors affecting the achievement of sustainable development in urban areas of Mahshahr port
Behroz Ghadar, Sadegh Besharatifar, Zarin Forougi Forougi,
Volume 26, Issue 80 (4-2026)
Abstract
Abstract
 Evaluation of indicators of sustainable development, as the axis of human excellence, is the dominant basis of urban planning and land management and has a decisive role in spatial dispersion and the formation of environmental behavior of human societies. The method of this research is descriptive-analytical and its main tool is a researcher-made questionnaire. Data were collected using library and survey methods (questionnaire tool). The statistical population is 35 neighborhoods of Bandar Mahshahr that the sample size through Cochran's formula with 95% confidence level using the number of households in Mahshahr 382 people who through simple random sampling in the neighborhood has distributed a questionnaire.  Based on the research criteria, the results show that the neighborhoods of Bandar Mahshahr are in a state of instability and the severity of instability is different between them.  So that in the selected indicators from the 35 neighborhoods, only neighborhoods 1, 2, 6, 15, 16, 17, 19 are at a stable level and other neighborhoods (28) are in an unstable situation, this situation is affected by their position in  It is the spatial structure of the city, which has led to the formation of neighborhood inequalities in terms of indicators of social stability and segregation.  The results of route analysis have shown that all economic, social, physical, environmental and spatial justice indicators have a positive and significant effect on sustainable development of Mahshahr city, among which the economic index has the greatest effect on sustainable development of urban areas.
 Keywords: evaluation, sustainable development, neighborhoods, planning, Mahshahr
Identification and zoning of landslide-prone areas in Khalkhal city
Ph.d Elnaz Piroozi, Ph.d Sayyad Asghari Saraskanrood, Ph.d Batool Zeinali,
Volume 26, Issue 80 (4-2026)
Abstract
Landslides are among the most common and destructive natural hazards that change the shape of the earth's surface, and reviewing the damages caused by landslides, the need to investigate the factors influencing the occurrence of this phenomenon and predict its occurrence. proves that Khalkhal City, due to its special geological, climatic, and geomorphological characteristics and human activities, has been affected by the risk of landslides for a long time. Therefore, considering the importance of the issue; The purpose of this research is to produce a landslide risk map in this city. In this regard, first, the distribution map of landslides and influencing variables, including; DEM, slope, aspect, land use, lithology, distance from fault, distance from river, distance from road, and rainfall were provided. Next, after the fuzzy membership and determining the weight values of each factor using the CRITIC method, the landslide susceptibility map was prepared using the MARCOS multi-criteria decision-making method. The results of the study showed, respectively; that The factors of slope, land use, and lithology with weight coefficients of 0.148, 0.139, and 0.132 have the greatest influence on the occurrence of landslides in the region. According to the results of the research, respectively; 707.14 and 512.87 square kilometers of the area of the city are in high-risk and very high-risk categories, and these areas are areas that need management work and the implementation of protection projects. Also, considering the use of the ROC curve method the area under the curve (0.89), and the correlation of 0.83% between the final map obtained from the research and the distribution of sliding surfaces, the accuracy of the MARCOS method in identifying and zoning prone areas The risk of landslides in Khalkhal city is great.
 

Statistical analysis of Iran's heavy rains during sudden stratospheric warming
Miss Sorayya Derikvand, Dr Behrooz Nasiri, Dr Hooshang Ghaemi, Dr Mostafa Karampoor, Dr Mohammad Moradi,
Volume 26, Issue 81 (6-2026)
Abstract
sudden stratospheric warming has an obvious effect on the Earth's surface climate. In this research, the changes in precipitation during the occurrence of this phenomenon have been investigated. For this purpose, after revealing the warmings that occurred during the studied period (1986-2020), 18 warmings were identified. The 5th decile and 9th decile of precipitation were calculated for the precipitation data of 117 stations. And the size of the difference from the normal rainfall was checked in two ways. First, the precipitation at the time of warming was compared with the long-term average, and then the trend of changes in precipitation at three times before thewarming, at the same time as the warming, and after the warming was finished. Finally, these results were obtained. Warmings according to the month in which they occur; They have a different effect on the amount of precipitation. In the sudden stratospheric warming that occurred in December, January and February, the northwest experiences the most rainfall changes and is above normal, and the probability of rainfall above the 9th decile increases up to 65%. Western and southwestern regions also have higher than average rainfall and the probability of heavy rainfall is high. Precipitation on the shores of the Caspian Sea shows an inverse relationship with sudden stratospheric warming, so in all the investigations of this research, the lack of precipitation at the time of warming in these areas is significant. Southern regions have less than normal rainfall in all sudden stratospheric warming events. The center of Iran has higher than average rainfall in the sudden stratospheric warming months of March. Eastern Iran also has heavy rains compared to normal during the sudden stratospheric warming months of March.

 
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