This research was carried out with the aim of understanding the spatial displacement of rainfall nuclei as an effective factor in the future hydrological conditions in Iran. Two types of databases were used to conduct this research. The first type of data is the monthly precipitation of 86 synoptic stations with the statistical period of 1986-1989 and the second type of predicted data from the output of the CCSM4 model under the three scenarios (RCP2.6, RCP4.5, and RCP6) from 2016 to 2036. After collecting and modeling the data, the maps were mapped to the ARCGIS environment. The results of the study showed that the terrestrial nuclei in the whole of Iran's zone in the four seasons will have changes with a negative trend in the future. The coefficient of rainfall variation in the spring, summer, autumn and winter seasons will be 61.4, 101.4, 58.9 and 55.8 percent, respectively. The results of the triple scenario study showed that the displacement of the spring core from all north north of the country to the northwest of the country is limited to the common borders of Iran, Turkey and Armenia (the Maku and Jolfa region), but in summer, the high core The northern shores and parts of the northwest of the country will be transported to the south of the country (around Khash and Saravan). In the autumn, the high-lying zone, which is located throughout the northern part of the country, will move to two distinct nuclei in the central Zagros (Dena and Zadkouh areas) and southwest Khazars (Anzali and Astara areas), and the core of winter from the central Zagros And the Caspian region will be transferred to the northwest of Kurdistan and southwest of West Azarbaijan, which will be seen in all scenarios. Another point is that, in addition to reducing the boulders, in the future, drought areas will cover more of the country.
 

Today, in view of the growing population and population density in urban areas, especially in densely populated and susceptible cities, the need for an inclusive and comprehensive approach to natural disasters and disasters caused by their occurrence has become more evident . Focusing more than the size of the population in specific urban areas, lack of preventive planning and lack of readiness to deal with accidents such as earthquakes, is a very serious and important threat to citizens and the survival of the city. The capital city of Karaj, as one of the major cities in Iran, has a high risk of earthquakes due to the presence of several active faults inside and outside it. Accordingly, investigations of the seismic vulnerability of this city are one of the necessities of Karaj city management. Regarding this, the metropolis of karaj was selected as the study area. The method of research and analysis of information collected based on database-based methods using the ELECTRE FUZZY model and Criteria for building materials, number of floors, quality of buildings, population density, building density, area of parts, width of passageways, geology, distance from faults, distance from medical centers, distance from public space, distance from urban facilities and travel compatibility for research purposes Were used. The results indicate that 6, 8, 1, and 7 areas of Karaj municipality are vulnerable to earthquake, so that more than 70 percent of Karaj city is vulnerable to earthquake vulnerability on low and low floors and Only about 20% of the city of Karaj due to its proximity to the fault and the high density of population, construction and ... is in high and high risk areas. According to the principles of urban planning, the regulations of 2800 can cover earthquake damage in these areas.

In recent years with the development of cities coatings of the Earth's has changed surface.  These changes have caused some urban areas to have a few degrees higher than the surrounding temperature. This phenomenon is known as thermal islands. Mashhad is one of the major metropolises in Iran with the problem of thermal islands. Various parameters affect the formation of thermal islands in this city that should be considered. In this study TM, ETM+ and OLI images were used to obtain surface temperature over the period 1987-2016. The study of temporal variations in surface temperature showed that in the studied period, thermal islands were transferred from outside the city to the city. The model for describing the temperature of the surface of the earth has changed and has diminished from the temperature of the city's moderate and cool temperatures, and in contrast, the amount of high temperatures (thermal islands) has increased significantly. The TOPSIS method was also used to obtain the thermal forming factors. 13 natural and human factors affecting the formation of thermal islands were identified. Each expert opinion factor was used to determine the degree of importance. According to experts, the distance from the sanctuary with a weight of %234 and traffic of %155 is the most important and the height with a weight of %022 is least important in the formation of thermal islands. The final results obtained from this model showed that the factors affecting the formation of thermal islands are well recognized and the temperature decreases with these factors.
 

Flood plains and adjacent rivers, which, due to their particular circumstances, are considered suitable places for carrying out economic and social activities, are always subject to the dangers of flood events. Hence, in these areas, determination of flood progression and its elevation relative to the surface of the earth, as well as determining the characteristics of the flood during the various return periods, which will be called flood zoning, will be of great importance. In this regard, this research aims at integrating the WMS hydrologic model with ARC GIS software to estimate flood zones in the Damand, Goladdareh, Saadabad and Maghsoud Baik watersheds on the main river of Darband. At first, the river Darband was divided into 19 main sections and in the HEC-RAS model, the river was zoned. In this research, using different digital maps, the flood extent in the riverside lands was calculated for a flood with a return period of 2 to 500 years. The SCS method was also used to increase the accuracy and reliability and also to identify areas susceptible to runoff production. The results of the study show that, due to land use changes, especially in the river basin and the abundant construction of the studied basin, there is no flood control power.

This research aims to study the impact of temperature and wind in the southern low-pressure system and its associated precipitation in the southern regions of Iran. As The southern low pressure system moves eastward, it crosses the southern regions of Iran, causing medium and heavy rainfall in these areas. In this study, two southern low-pressure systems that caused heavy rainfall on March 11, 2015 and January 17, 2000 in southern Iran were selected, analyzed and simulated using the numerical Weather Research and Forecasting (WRF) model. Since the wind and temperature fields play a significant role in the southern low-pressure systems, four experiments were performed for investigating the effects of temperature and wind on the intensification and weakening of the southern system. The simulation results showed that the simulation for the increased (decreased) temperature caused the weakened (intensified) the southern low pressure in the studied area. This result showed that the vertical structure of the southern low-pressure and its physical characteristics are similar to the mid-latitudes cyclones, and these systems were different from the thermal low pressures. The results of wind speed changes showed that the increased (decreased) wind speed simulation caused an increase (decrease) in relative vorticity, thus the southern low pressure was intensified (weakened). In both cases, the rainfall was decreased by the increased temperature simulation, and decreased temperature caused an increase in rainfall. It was also seen that the increase in wind speed caused the special humidity advection to be increased and then the rainfall increased. Also the amount of rainfall decreased when conditions did not provide for the advection of specific humidity or the wind speed reduced.

Abstract In present century the air transportation has had a very important role in relations between different countries of the world ,as exchanging of culture, showing the economical and military power and speeding the vital affairs of a country and in this case airports form a very critical role in the Air Transportation system An airport is the most infrastructural part of the transportation industry in each country. Therefore, recognizing the problems of this sector of the aviation industry is effective on expediting activities related to the transportation of passengers, the development of the flight network, the growth of the physical airport, reduction in air accidents and problems caused by the proximity to residential areas (colliding with residential areas and noise pollution). In this regard, the aim of the present study is to investigate the problems of Mehrabad International Airport as the most important airport for domestic flights from the aerodrome point of view and the flight network based on standard indices of the national aviation industry. Therefore, among the experts of the aviation industry (pilots, officials and personnel working at Mehrabad Airport), 240 individuals were selected as the sample and a researcher made questionnaire was distributed among them. The application of factor analysis model and SPSS and Lisrel software revealed that the most important problems of Mehrabad Airport are proximity to residential areas, causing noise pollution for residents around the airport, adjacent to the military airport, lack of proper distance from other airports, and its role as flight origin for domestic flights in the Iran’s national airline, totally explain 83.79 % of the common variance. Other variables have not been able to justify significant variance.

An earthquake, though a natural phenomenon that can be very destructive, But urban planning and management can play an important role in the damage it poses. Today, risk analysis is one of the basic needs for planning in general and urban planning in particular. From the perspective of many researchers, urban regeneration is one of the most important issues for sustainability. It serves as a way to strengthen communities by using their capacities. From the issue of choice in the city of Ilam, Ilam is located in the Zagros zone. So that the Zagros area has the highest earthquake with magnitude 4 to 4/5 richter has. According to the necessity of this research, a combination of methods (descriptive, exploratory, surveying, and analytical). In terms of the nature of research, it has a developmental-applied approach in line with the overall objective of urban spatial management planning research from the perspective of resilience is a city of Ilam. Based on the VIKOR statistical statistic, Bootstrap and Bootstrap simulation have been used. Visio, Grafer, SPSS, MINITAB and GIS software have been used to complete the research. Results of the findings were based on Bootstrap simulation and based on the 196 cells studied, distributed among 14 urban districts; The minimum residual cell in the city of Ilam has been around 0.07 percent. Therefore, the dispersion and status of the Ilam city variables can not be confirmed at urban confidence level of 95%. Based on the VIKOR model of the 4th region, the least resiliency and the region of 2 is the highest Ilam city resilience. Also, the regression model calculations have shown that the applied model is a good predictor of the urban regression variable. Because the significance of the present study is less than 0.05.

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. 

Evaluating environmental impact can help urban and regional planner and manager to understand the impacts of development plans on human well-being and environmental health. Therefore, it can enable them to prevent environmental pollution and degradation. This descriptive- analytical research aimed to assess environmental, physical, economic and socio-cultural impacts of Talesh Industrial Estate on Kashli village as the nearest settlement to the estate. Data were collected using a questionnaire. The variables are set in 29 items and were evaluated in 11 ranges by 270 sample people on the basis of a model adopted from Pastakia method. Findings showed that the industrial estate had more positive consequences than negative ones. Positive and negative consequences are more prominent in economic dimension and in environmental dimension respectively. Of the 29 impacts evaluated, the estate has had 16 positive and 13 negative impacts.

Rural services and the power and location of rural services are one of the important issues in planning. In examining patterns and systems of rural services, the status and importance of each village in terms of utilizing a variety of rural services and its ability to receive or transfer Services are considered as an essential element and element. The spatial analysis of services can be described and explained in the context of distributive justice. The rural areas of the Tankeman district of the Alborz province have faced rural immigration in recent years, while faced with challenges in terms of enjoying some rural services. In order to plan and optimize the rural service system in this section, it is necessary first of all to evaluate the situation of each village in terms of utilizing rural services. Based on this, by providing a questionnaire from 16 selected villages in this section, the status of each village was evaluated for different types of rural services based on the number of existing services and the decision matrix was formed and then through Antherapy method, the weight of each specified service and then prioritized by using COPRAS  model. The results show that the main village has basic services. But they are facing challenges with modern and new services. Accordingly, the villages of Bakhtiar, Nukand and Mohammad Abad Khalisheh, Kareem Abad, Qasem Abad and Dengizak have the most benefit from rural services, and this situation follows a cluster pattern.

 Both visual and service quality of urban landscape play an important role in the process of visual visibility assessment and effectiveness of these services as well. Given the fact that the existence of dead, cold, and soulless spaces in cities is affected by heterogeneity and visual contamination that is free from eye-catching and desirability. Therefore, this research seeks to evaluate the visual quality of the urban landscape of the Eil Goli district of Tabriz through the scale of the SERVQUAL tool. Understand the gap between the current situation and the expectations of Tabriz people on the 45-meter of El-Goli Boulevard towards the visual quality of the urban landscape; to realize the views and preferences of Tabriz citizens regarding the visual quality of urban landscape for the 45-meter El-Goli Boulevard in order to eliminate the weaknesses while improving its visual quality, taking into account the priorities and preferences of the people and to provide informative background for decision makers to improve the urban landscape design of Tabriz. So, data collection is carried out through the various sources in a comparative-analytical manner, using the documents, records and reports. The research statistical society includes citizens, specialists and experts and managers of the Department of Parks and Municipality of District 2 in this area which totally 310 questionnaires used for data collection. A questionnaire, expert analysis and library analysis will be carried out in the field observations for two sides of the El-Goli 45-meter Boulevard. The SPSS software, Klomgroph-Smirouph and One-way ANOVA used for analyses, checking the normal distribution of variables and comparing the five dimensions of service quality respectively. The results of the study indicate the relative satisfaction of the three groups under study. Also, some suggestions presented in order to increase urban satisfaction for the 45-meter boulevard of El-Goli, Tabriz city