In this study, the changes in the Khorramabad storm in the period of 1952 to 2015 have been investigated. For this purpose, data from meteorological codes 06 and 07 were received from the Meteorological Organization of the country, and after identifying the days of winding with dust storms and calculating their monthly frequency, monthly, seasonal and annual time series were analyzed. In this study, descriptive statistics, cluster analysis, linear and polynomial trend analysis, and nonparametric Mann-Kendal test were used to study the frequency variation of dust storms in Khorramabad station. The results of the research showed that the monthly frequency of dust storms in Khorramabad station in the middle of May, July and June is May and July, respectively, and from May to July (May to July), the frequency of storms in the dust and dust Khoramabad station is added that this issue is not related to the district heating and dry season. In the seasonal season other than the autumn, which is not frequent with frequent dust storms, in the rest of the seasons, especially in spring and summer, the seasonal concentration of dust storms in Khoramabad has been intensified. The analysis of the trend of time variation in the occurrence of dust storms in Khorramabad station showed that in most of the months of the year and in the three seasons of spring, summer and autumn, as well as in the annual period, there was a significant change in the frequency of dust storms in Khorramabad station. It is increasing with a relatively steep slope, indicating that in the future, the frequency of dust storms in Khorramabad station will be increased.

The aim of current research is atmospheric hazards climate zoning in Iran Northwest. So meteorological organization data were used in cases such as mean temperature , minimum temperature , maximum temperature, precipitation in monthly and daily scale for 13 synoptic stations in range of East Azerbaijan province, West Azerbaijan province) and Ardebil province during 26 years. (1990-2015) in this research , it was investigated 10 main atmospheric hazards such as famine or drought , hailstone,, heavy snow , thunder storm, severe precipitation, margin precipitation , blizzard , fogging , dust storm in range of Northwest bound. Then happening frequency maps were prepared with separating form for hazards by using Geographic information system. (GIS) Also spatial zoning maps were prepared for every class. Finally by combining all of hazards investigation; it was prepared Northwest region atmospheric hazards extensive map. Results show that, East, Southeast, center and West parts in Northwest region are located among most hazard zones based on happening frequency. But Northeast parts and zones have the least hazards. Also results express that blizzard and dust storm are main atmospheric hazards at Northwest regionThe highest hazard frequency in Northwest region relate to blizzard with 4148 hazards during 1990-2015 study period. The highest blizzard frequency in Ahar station is observed with 514 hazards. The second hazard in Northwest relate to dust phenomenon with 1948 cases. The highest frequency of mentioned case was observed in Maragheh station with 410 hazards. The third case in Northwest relate to thunder storm phenomenon with 1773 hazards. The sixth case relate to icing phenomenon with 1315 hazards meaning. The highest icing frequency is observed in Khalkhal station with 144 hazards. The seventh case relate to hailstone phenomenon at Northwest with 341 hazards. The highest of hailstone frequency is observed in Maragheh station with 56 hazards. The eighth case relate to fogging phenomenon with 333 hazards. The highest of fogging is observe in Ahar station with 135 hazards. The ninth case relate to famine or drought phenomenon at Northwest with 168 hazards. The highest of famine or drought frequency is observed in Urmia and Ardebil stations with 16 hazards totally. The highest margin precipitation is observed in Parsabad station with 19 hazards. The lowest frequency of margin precipitation relate to Makou and Khalkhal stations with 4 hazards totally.

Quite a lot of people are employed in gas production and refining industry in IRAN. In case of weakness or lack of having an effective management, the associated companies will impose heavy damage to the country. In this regard, to achieve consistency and safety in IRAN, ascendancy of management in these companies is one of the main and effective attempts. In order to manage the crisis of technological hazards in south pars gas complex, this study presents a strategic model. To this end, firstly, a review of all research and previous studies is done. The statistical population of this study is 35 persons including managers, safety experts, HSE, and Passive Defense experts. Effective factors on technological hazards management is defined as: leadership and management, human resource, organizational culture, organization agility, organization systems, local infrastructures, production continuity and, continuum inspection is determined through an exhaustive investigation. Subsequently, a questionnaire using Delphi technique is prepared and conducted over the statistical population. The obtained data was analyzed with SPSS and AMOS software, and the results showed that among the other factors, human resource has more considerable effect on crisis management.

A city is a vibrant, dynamic, and evolving phenomenon that grows and spreads over time and space, and is exhausted and degraded.It also faces crises such as natural hazards and artifacts, resulting from human relationships and physical elements, on the one hand, and social, economic, cultural, geographical, political, and historical conditions on the other. The deteriorated urban fabric, which has physical, functional and operational deterioration, are resistant to the above-mentioned crises and has low vulnerability. Therefore, the need of intervening in these fabrics is crucial for balancing, coordinating the foundations of social life, and improving the urban structure. In this regard, in this research, priority is given to the dimension of resilient deteriorated urban fabric based on a disaster resilience of place model which is one of the models of urban resilience measurement. This research is a descriptive-analytical according to method and is developmental-applied research in terms of the purpose. Also, Expert Choice software and AHP model are used to analyze the collected data by using a questionnaire. The results of the research indicate that, in three macro areas of Karaj, Hesarak and Mehrshahr, the physical-environmental resilience dimension has the highest weight and organizational-institutional resilience has the least weight. Overall, regarding prioritization of resilience dimensions, criteria and indicators, an increasing per capita of vital use in study areas, changing the economic structure of residents, as well as increasing the skill and coherence of citizens to deal with hazards and crises are important.

Today, the huge economic damage of natural hazards, especially of the micro-organisms, to human societies has led the concept of economic sustainability to mitigate the effects of crises to become an important area in crisis management. The purpose of this study was to investigate the role of environmental hazards (effluents) on Ahwaz economy. This research can be considered as a type of applied-development research, and is a descriptive-analytical study in a correlation manner. The population of the study consisted of all residents of Ahwaz, in 1395, there were no more than 1302000 people. The sample size was 384, based on the Cochran formula, and randomly available. To investigate the data, the structural equation path analysis was used in Amos18 software. The results indicated that the microprocesses had an effect on the economy of Ahwaz with a coefficient of 0.31 and a significant level of 0.002. Also, the effect of fiery gradients was 0.73, and the significance level of 0.000 on the tax, the microguns, with the coefficient of influence 0.45 and the significance of 0.000 per facility, the effects of the micrographs with the coefficient of 0.55, and the significance of 0.000 on the housing, With a coefficient of influence of 0.17 and a significant amount of 0.008 on transportation. Accordingly, microblogging has the most impact on finance with a coefficient of 0.73, and transportation with a coefficient of influence of 0.17 has had the least effect.

One major issue to be considered in today's cities is their resilience which plays an important role in reducing the damage and casualties caused by various natural hazards. These hazards often have devastating effects on human settlements, and resilient settlements in various managerial, physical, economic, and social aspects is a great way to enhance the effectiveness of cities in dealing with a variety of potential and unexpected crises. In this regard, addressing the resilience of cities in different aspects reveals the importance and necessity of research. The purpose of this study is to investigate the factors influencing the resilience of cities to natural disasters. The research method is applied in terms of purpose and descriptive-analytical in terms of methodology. The statistical population includes specialists and experts. FVIKOR model is used to analyze the components and characteristics, and EDAS method is used to show the condition of areas in terms of resilience. The results from Fuzzy VIKOR show the institutional component in the first place with the most score (zero) and the economic component in the last place with the score of 0.287. Also, the results from EDAS in different aspects of the studied areas show high resilience of districts 2 and 5 and low resilience of districts 4 and 8. Generally, more than 50% of Tabriz districts are less resilient.

Today climate change cause increase in concentration of greenhouse gases has been cause increase extreme events and atmospheric hazards. goal of this research, analyze and review climate future is for atmospheric hazards in sistan region. In this study, to simulate minimum and maximum temperature data used from model data CanESM2 under three scenarios (RCP2.6, RCP4.5, RCP8.5) with SDSM statistical scrolling and to simulate rainfall data from the Hadcm3 model under scenarios (A1B, A2, B1) with statistical scrolling LARS-WG. For this purpose, after calibration, validation and data modeling at the selected station, the performance of the model from the viewpoint of the compliance of the base temperature data (1984-2005) and rainfall (1986-2015) with simulation values (2020-2039) evaluated at a significant level of confidence. To adapt base data to simulated data Used of the three criteria root mean square error (RMSE), coefficient of determination (R2) and mean squared error (MSE). According to simulated data were examined four important atmospheric hazard frost, heat waves, extreme precipitation and drought. The results showed that heat waves and drought in the future are serious threats in the region So that in 2021, under release scenario RCP 2.6, Predicted 32 heat waves and the study area will experience more than five heat waves in the year. In addition, most frequent drought forecast in 2020, under release scenario A1B. Extreme precipitation in some years under scenario B1 can be significant threat in the region. Intensity and abundance annual frost under release scenario RCP2.6 more than other scenarios and lower relative to investigated atmospheric threats.