Journal of Sustainable Urban & Regional Development Studies (JSURDS)

Abstract Background and Objective: Today decision-makers in dealing with drought consider the integrated management approach of crisis management and risk management simultaneously. So far, Mazandaran province has suffered a lot of damage from drought risk. Therefore, determining the level of vulnerability and type of meteorological drought risk situation in the study area, especially in the last two decades, is the main issue of this study.
Methodology: Methodology in order to determine the meteorological drought situation, the Standard Precipitation Index was used in this study. First, the monthlt rainfall statistics for 17 selected meteorological stations in the region were collected and tested for accuracy, precision and feasibility during the common period of 2000-2020. For each of the station in question the percentage of meteorological drought occurrence was determined on an annual time scale. Then the drought Hazard Index (DHI) was extracted by assigning weights and degrees for each of the different intensities. Also the vulnerability of meteorlogical drought was calculated using physical and socio-economic indicators and then the drought- vulnerable zones were determined. Finally based on the two factors of drought hazard index and vulnerability index, the risk of drought damage was calculated and then the zones at risk of meteorological drought were determined.
Results and Findings: Findings and conclusion the results of the research on drought conditions showed that the most severe droughts occurred in the region in 2000, 2008, 2012, 2014, 2016 and 2017. Based on the drought risk index, the results showed that northern part of the region and its central part with an area equivalent to 24% in the SPI index, 22% in the VCI index (vegetation condition index) and 28% in the VHI index (vegetation health index) and 20%   in TCI index (surface temperature index) the area of Mazadran province are very susceptible to the risk of meteorological drought. 35 percent of the province's area, located in the north of the province, has very high drought vulnerability. The results of this study indicate that the risk and vulnerabilities caused by meteorological drought seriously threaten Mazandaran province. Meteorological drought risk maps can be used as a suitable warning tool in the risk reduction action plan for all policmakers, managers and stakeholders of the studied region. This issue is of particular importance in planning agricultural activities and the optimal use of water resources, especially in this province where the livelihoods of agricultural operators depend on both rainfed and irrigated agriculture.

Abstract Background and Aim: In recent decades, earthquakes have been accompanied by an increase in casualties worldwide in the past hundred years, and in Iran, these casualties have led to about a six percent increase in death and destruction. Therefore, cities, as the sites of these incidents, are of great importance, and enhancing post-earthquake resilience in urban areas is highly significant. Region 1 of Tehran, due to its location on a fault line and various urban challenges, is considered one of the vulnerable areas to earthquakes in the city of Tehran, facing resilience challenges such as high concentration of high-rise buildings, lack of open spaces, and weaknesses in crisis management compared to other areas of Tehran. The aim of this study is to assess the vulnerability of Region 1 to earthquakes with a focus on resilience.
Methods: This research is considered applied in nature and utilizes survey research for data collection, and in terms of data nature, it is quantitative research. The main data collection tool for this research is the TOPSIS questionnaire, which has been adjusted based on the research background and preliminary studies of researchers in the field to align with the conditions and requirements of local management services. The statistical population of the study consists of all experts in the field of crisis management and urban planning, with a sample size of 50 individuals based on Cochran's formula. The present study utilizes the mean test in SPSS software and employs the TOPSIS decision-making method in MATLAB software to measure the level of resilience in the regions of Region 1.
Findings and Conclusion: The research findings indicated that based on urban resilience indicators, five analyzed indicators had the least resilience in both the physical-environmental and institutional dimensions in each region. Ultimately, the results showed that Regions 1, 9, and 8 faced the lowest level of urban resilience against earthquakes in the Region 1 areas.

Abstract Background and Aim:  Kerman is the most earthquake-prone province in the country due to active faults and earthquakes with high human casualties. Of the total area of worn-out tissue in Kerman province, which is about 4062 hectares, of which 1589 hectares are located in the city of Kerman.  The aim of the study is to identify and level the vulnerability of the city's tissues. The issue of the city of Kerman is that there are many vulnerable areas, and identifying vulnerable surfaces and reducing the vulnerability coefficient can help effectively manage the crisis. Methods:  The research method is descriptive-Analytical, the research data is prepared by documentation and field methods and references to organizations. The types of users were examined at the Kerman city level and the ratio of each was obtained.  Some of the human indicators affecting structural resistance in Kerman were examined and described, and the number and percentage of types of structures in Kerman were obtained using GIS software, maps, resources, information and navigation methods, which were given in the relevant table Findings and Conclusion: Results show that in total, 83% of the structures in Kerman have a vulnerability of more than 50%, and 4% of the structures in Kerman have sufficient resistance to a relatively strong possible earthquake. And with the research done, about 53% of the population of Kerman lives in areas with a risk of more than 50%. And finally, factors such as the strength, resistance and formability of the constructive elements were regular, structural hardness and durability, and the presence of continuous load transmission routes were examined to increase structural resistance to earthquakes.

Abstract Background and Aim: Population growth and the expansion of settlements in high-risk region, especially in developing countries is increasing. In urban areas, the normal effects of natural disasters may not be so damaging but when it comes to human societies and human knowledge Become a natural crisis - a technological one Includes a combination of physical injuries and urban dysfunction.considering the location of Ilam province in terms of seismicity and lack of proper location of its settlements and its location on active faults,identify region unfavorable for earthquake hazard and prevent the establishment of human settlements in these areas is essential to reduce risks in the future which can be mentioned as the most important goal of this research.
Methods: The present study has studied the safety of urban planning with the consideration of safety principles.the research a applied developmental approach and a combination research method (descriptive, analytical, and field).
Findings and Conclusion:The have been used to analyze by GIS, Grafer, VISIO, SPSS and TOPSIS models.the results show that average vulnerability caused by earthquakes between (0 and 1) in Ilam province, against 0/4 percent.Dehloran urban region has the highest earthquake vulnerability in the physical index among all of the province's cities.also in terms of study; the amount of TOPSIS achieved In this region is 0/6 percent more and the Shirvan region had the lowest level of 0/11 percent.

Abstract Abstract
Climate change and geographical factors and geographical location on earth have their own precipitation and fluctuations. The geographical features of the place are one of the influencing factors on the rainfall of each region. Also, the role of environmental variables in the amount and distribution of precipitation is undeniable, especially in mountainous areas. Flood vulnerability varies over time and from one region to another, which is due to special natural conditions, human activities, and the risk culture of the society exposed to damage. The effects of environmental factors on climatic elements have caused the increasing use of statistical techniques in climatic studies. Therefore, in the current research, climate change and effective geographical factors in urban floods in Yazd province.In this study, 9 factors of slope, direction of slope, height, network of waterways, rainfall areas, vegetation map, soil map, land use were identified as effective factors for causing floods in the regions. Then the information layers were prepared in the Gis environment. Conclusion According to the conducted research and observations of climate change and geographical factors of the study area, the results show that among the effective factors in causing floods in the study area, the factors of height, slope, amount of rainfall, water network and land use, respectively, are the most important causes of flooding in the region. that the studied area is in a very high-risk category, and the results of the study indicate the high potential of the area in terms of flood risk due to geographical